汽修专业通识题库word版(2014.7.5)(1)(1)

汽修专业通识 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 库word版(2014.7.5)(1)(1) 汽车检测与维修技术专业通识题库 一、单选题 1(大众车系电路图上的统一代码“30”的含义是什么。( A ) A(常电源线 B(大容量电器电源线 C(小容量电器电源线 D(搭铁线 2(讨论丰田车系电路图时，甲技师说“B+”表示电源端，乙技师说“E”表示搭铁端，请问谁的说法正确。 ( C ) A(甲正确 B(乙正确 C(甲、乙都正确 D(甲、乙都不正确 3(一般来说，电路图中导线颜色“W”指什么颜色,( B ) A(红色 B(白色 C(黑色 D(蓝色 4(在读取传感器波形时，如没有合适的测点，可用以下哪种方法操作,(B ) A(破皮选择测点 B(选用跨接线 C(剪断导线 D(不能操作 5(OBD-?诊断座第16号端子是( A )。 A(电源端子 B(信号传输端子 C(搭铁端子 D(信号采集端子 6(故障代码可用以下哪种设备调取,( C ) A(万用表 B(示波器 C(综合故障诊断仪 D(尾气分析仪 7(排除故障后，如不清除故障码，运行发动机后故障警告灯( B )。 A(不亮 B(继续点亮 C(先亮后灭 D(先灭后亮 8(丰田车系STA是什么信号,( B ) A(空调开关信号 B(启动信号 C(空档开关信号 D(电源电压信号 9(属于稀混合气的是( A )。 A(过量空气系数大于1 B(过量空气系数小于1 C(过量空气系数等于1 D(过量空气系数不为1 10(当流量增大时，空气流量计电压信号应( B )。 A(变小 B(变大 C(不变 D(上下波动 11( 丰田8A节气门位置信号电压随节气门开度增大，应( D )。 of vision Yibin formation in the Center surrounded by, organic dispersion band of bead-space layout structure, as leading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden Sands area on a long-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-center" strategic vision of space frame. Yibin Center City development construction steering extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the construction of peripheral green space and protection of historical A(变小 B(不变 C(视情而定 D(增大 12(用万用表交流电压档测量磁电式曲轴位置传感器信号电压时，( D )。 A(信号电压不变 B(电压随转速的增大而减小 C(信号电压先变大，后变小 D(电压随转速的增大而增大 13(在暖机过程中，ECU主要根据哪个传感器控制怠速阀的开度。( C ) A(进气温度传感器 B(节气门位置传感器 C(水温传感器 D(转速传感器 14(以下哪个汽车品牌采用了V-TEC技术。( C ) A(丰田 B(宝马 C(本田 D(日产 15(以下哪项不属于汽油机能正常起动必须具备要素。( D ) A(正确的点火正时 B(合适比例混合气 C(正确气缸压缩压力 D(水温高于零摄氏度 16(装有油压调节器的燃油供给系统，进气压力越高，油压( A )。 A(越高 B(越低 C(不变 D( 视情而定 17(火花塞被浸湿时，可采用以下哪种断油控制清除。( C ) A(超速断油 B(减速断油 C(清除溢流断油控制 D(减转矩断油控制 18(发动机运行过程中，仪表盘上的发动机故障警告灯点亮时， 说明 关于失联党员情况说明岗位说明总经理岗位说明书会计岗位说明书行政主管岗位说明书 ( C )。 A(发动机控制系统在自检 B(发动机控制系统运行正常 C(发动机控制系统出现故障 D(没有特殊含义 19(对于常规故障，在动手拆卸和测试之前，应将故障原因设定范围尽可能( B )。 A(扩大 B(缩小 C(保持 D(视情而定 20(在释放燃油系统的残余压力时，甲技师说，要拔下油泵继电器，待发动机运行至熄火;乙技师说， 只需拆下油管，放掉燃油即可。请问谁的说法正确。( A ) A(甲正确 B(乙正确 C(甲乙都正确 D(甲乙都不正确 21(技师甲说:发动机在大负荷工况下需要较大的点火提前角。技师乙说:发动机在高转速工况下需要 较大的点火提前角。请问谁说法的正确。( B ) A(技师甲 B(技师乙 C(两人说得都对 D(两人说得都不对 2e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 22(在讨论闭环控制时，甲同学说空燃比的闭环控制元件是氧传感器;乙同学说点火系统的闭环控制元件是爆震传感器，请问谁正确。( C ) A(甲同学说得对 B(乙同学说得对 C(两人说得都对 D(两人说得都不对 23(装在排气管上的传感器是( B )。 A(水温传感器 B(氧传感器 C(转速传感器 D(空气流量计 24(电控燃油喷射系统用英文表示为( D )。 A(ESA B(ISC C(EGR D(EFI 25(节气门位置传感器安装在什么位置。( B ) A(进气管内 B(节气门轴上 C(气缸体上 D(排气管上 26(技师甲说燃油滤清器脏堵会引起燃油压力降低，技师乙说燃油滤清器脏堵会引起发动机加速性能下降。请问谁正确。( D ) A(甲正确 B(乙正确 C(甲乙都不正确 D(甲乙都正确 27(甲乙技师在讨论L型燃油喷射系统中哪个是作为燃油喷射的主控制信号传感器时，甲说是空气流量计，乙说是进气歧管压力传感器。( A ) A(甲正确 B(乙正确 C(甲乙都不正确 D(甲乙都正确 28(甲乙技师讨论进气温度传感器通常采用什么热敏电阻，甲技师说采用正温度系数热敏电阻，乙技师说采用负温度系数热敏电阻。请问谁正确。( B ) A(甲正确 B(乙正确 C(甲乙都不正确 D(甲乙都正确 29(甲乙技师讨论汽油辛烷值对点火提前角的影响时，甲技师说汽油辛烷值越高，抗爆性越好，点火提前角可增大;乙技师说汽油辛烷值越高，抗爆性越差，点火提前角应减小。请问谁的说法正确。( A ) A(甲正确 B(乙正确 C(甲乙都不正确 D(甲乙都正确 30(讨论诊断仪时，技师甲说，综合故障诊断仪可以显示数据和故障码，并能执行其他诊断任务;技师乙说，诊断仪也可以诊断不同车辆上的电子控制系统。请问谁的说法正确。( C ) A(甲正确 B(乙正确 C(甲、乙都正确 D(甲、乙都不正确 31(发生机械伤人事故首先要打的电话是( D )。 ction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead3of peripheral green space and protection of historical A(122 B(119 C(110 D(120 32(在讨论发动机启动前检查时，甲说要检查机油液位，乙说要检查轮胎气压，请问下列说法正确的是。( A ) A(甲正确 B(乙正确 C(甲、乙都对 D(甲、乙都错 33(在讨论喷油器清洗机的功能时，甲说它可以检查喷油器的雾化情况，乙说它可以检查喷油器是否泄漏，请问谁的说法正确。( A ) A(甲正确 B(乙正确 C(甲、乙都对 D(甲、乙都错 34(在示波形图上点火线全部低于正常值，以下哪种情况不会导致这种现象产生。( C ) A(点火电压太低 B(混合气太稀 C(点火时间太早 D(分火头漏电 35(讨论混合气过稀的原因，甲说可能是空气流量计故障，乙说可能是燃油压力过低，请问谁的说法正确。( C ) A(甲正确 B(乙正确 C(甲、乙都对 D(甲、乙都错 36(下列哪个部件异常不会导致起动机不工作。( B ) A(启动继电器 B(油泵继电器 C(启动保险 D(点火开关 37(在检修丰田车系油泵电路时，甲说油泵保险损坏会导致油泵不工作，乙说EFI保险损坏也会导致油泵不工作，请问正确的是( C )。 A(甲正确 B(乙正确 C(甲、乙都对 D(甲、乙都错 38(ECU的STA端子在哪种情况时有电压( B )。 A(怠速工况 B(起动工况 C(小负荷工况 D(大负荷工况 39(丰田车系ECU的哪个端子在接收到开关ON的信号时，会控制EFI继电器，给ECU提供+B电源。( B ) A(BATT B(IGSW C(MREL D(E 40(某发动机设计有预置油压功能，起动发动机前如果点火开关处于ON的位置，燃油泵会( D )。 A(持续运转 B(不运转 C(运转10S后停止 D(运转3S后停止 4e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 41(在分解发动机的过程中，发现火花塞的端头成雪白色，下列哪项是正确的。( B ) A(正常 B(发动机过热 C(混合气浓度太高 D(高压点火线漏电 42(检修丰田车系节气门位置传感器时，技师甲说节气门位置传感器信号输出端子VTA与E2端子之 间的电压值应随节气门开度的增大而增大，技师乙说应该变小，请问谁的说法正确。( A ) A(甲正确 B(乙正确 C(甲、乙都对 D(甲、乙都错 43(当接通启动开关后，发动机能转动，但转动无力，达不到启动所需转速。说明( A )。 A(蓄电池存电不足 B(启动传动装置有故障 C(飞轮齿圈有故障 D(导线断路 44(若汽油发动机混合气过浓，燃烧后，排气管排烟颜色应为( B )。 A(蓝色 B(黑色 C(白色 D(无色 45(date的英文意思是。( B ) A(大小 B(日期 C(数量 D(多少 46(corporation的英文意思是。( B ) A(社会 B(公司 C(销售部 D(维修部 47(WARNING的英文意思是。( C ) A(注意 B(当心 C(警告 D(警号 48(passenger car的英文意思是。( A ) A(轿车 B(概念车 C(公交车 D(跨界车 49(ignition system的英文意思是。( B ) A(启动系 B(点火系 C(制动系 D(照明系统 50(running gear的英文意思是。( C ) A(传动系 B(传动系 C(行驶系 D(运动系 51(cranking shaft的英文意思是。( A ) A(曲轴 B(曲杆 C(连轴 D(连杆 5of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 52(OHV的英文意思是。( D ) A(气门 B(阀门 C(气阀 D(顶置气门 53(MPFI的英文意思是。( B ) A(少点燃油喷射 B(多点燃油喷射 C(燃油喷射器 D(燃油器 54(differential的英文意思是。( D ) A(减速器 B(加速器 C(变速器 D(差速器 55(hydraulic power assisted steering的英文意思是。( D ) A(液压助力转向 B(转向盘 C(电压助力转向 D(电动助力转向 56(Neural的英文意思是。( C ) A(倒档 B(驻车 C(空挡 D(停靠 57(A?C的英文意思是。( A ) A(空调 B(自动化 C(电气化 D(充电 58(distrbutor的英文意思是。( B ) A(充电器 B(分电器 C(蓄电器 D(电动机 59(maximum speed的英文意思是。( A ) A(最高车速 B(最低车速 C(最大速度 D(最小速度 60(audio system的英文意思是。( A ) A(音响系统 B(音乐系统 C(自动系统 D(电动系统 61(ABS的英文意思是。( B ) A(制动系统 B(防抱死制动系统 C(防抱死系统 D(制动附加系统 62(license plate的英文意思是。( A ) A(牌照 B(保险杠 C(仪表板 D(符号 63(Cigar lighter的英文意思是。( C ) 6e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(尾灯 B(大灯 C(点烟器 D(阅读灯 64(ID card No的英文意思是。( C ) A(证件 B(地址 C(身份证号 D(身份 65(amount的英文意思是。( C ) A(质量 B(核对 C(数量 D(部分 66(Repair man的英文意思是。( A ) A(维修人员 B(管理人员 C(销售员 D(服务员 67(starter signal的英文意思是。( B ) A(发现信号 B(启动信号 C(停止信号 D(加速信号 68(检测仪屏幕上的FULL的英文意思是。( A ) A(全屏 B(截图 C(图形显示 D(记录 69(DTC的英文意思是。( D ) A(故障 B(诊断 C(故障诊断 D(故障诊断码 70(tighten的英文意思是。( D ) A(牢固 B(可靠 C(收紧 D(紧固 71(circuit的英文意思是。( B ) A(开关 B(线路 C(短路 D(线圈 72(在讨论传动系的作用时，技师A说传动系可以把发动机的动力传递给驱动轮;技师B说传动系是 用来控制传到驱动轮上的动力，以保证汽车安全转向。谁说的对,( C ) A(技师A说的对 B(说的对 C(技师A和B都说的对 D(技师A和B说的都不对 73汽车传动系的功用是将发动机发出的动力按需要传给( A )。 A(驱动轮 B(转向盘 C(变速器 D(离合器 74(从结构上看，膜片弹簧式离合器的膜片弹簧，除具有压紧弹簧的作用外，还兼有( B )的作用。 7of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(分离轴承 B(分离杠杆 C(减震 D(变形 75(下列哪个部件属于离合器的从动部分( B )。 A(离合器盖 B(从动盘 C(压盘 D(压紧弹簧 76(离合器踏板自由行程过大会造成( A )的故障。 A(分离不彻底 B(打滑 C(结合不柔顺 D(漏油 77(手动变速器中为防止自动脱档及自动挂档的装置是( A ) A(自锁 B(互锁 C(倒档锁 D(差速锁 78(汽车变速器( B )的主要作用是改变转矩、转速和旋转方向。 A(变速操纵机构 B(变速传动机构 C(安全装置 D(齿轮 79(手动变速器一般由壳体、同步器、( A )和操纵机构组成。 A(变速传动机构 B(齿轮 C(输入轴 D(输出轴 80(为防止变速器工作时，由于油温升高、气压增大而造成润滑油渗漏现象，在变速器盖上装有( A )。 A(通气塞 B(卸油阀 C(安全阀 D(泄压阀 81(锁环式惯性同步器加速同步过程的主要原因是( D )。 A(作用在锁环上的推力 B(惯性力 C(摩擦力 D(以上各因素综合 82(同步器目前应用最为广泛的是( C )同步器。 A(常压式 B(自行增力式 C(惯性式 D(分开式 83(汽车变速器的操纵机构有( B )种锁止装置。 A(2 B(3 C(4 C(5 84(下面A、B、C、D是某三档变速器的各档传动比，则最有可能是倒档传动比的是( D )。 A(I=2.4 B(I=1 C(I=1.8 D(I=3.6 85(手动变速器互锁装置的作用是( C )。 A(防止误挂倒档 B(防止变速器自动换挡或自动脱档 8e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(防止同时换入两个档 D(减少零件磨损和换档噪声 86(自动变速器位于P位时，( C )不能转动。 A(变矩器 B(油泵 C(输入轴 D(输出轴 87( 自动变速器无前进档，甲说:可能前进离合器打滑，乙说:可能是前进离合器油路严重泄漏。 ( C ) A(甲正确 B(乙正确 C(两人均不正确 D(两人都正确 88(万向传动装置一般由( B ) 等组成。 A(万向节、传动轴、主减速器 B(万向节和传动轴 C(输入轴和传动轴 D(主减速器和差速器 89(万向节叉轴过渡区有划痕，产生应力集中，会引起传动轴( D )。 A(磨损 B(弯曲 C(扭曲 D(断脱 90(下列哪项不是汽车行驶系的功用( D ) A(接受发动机转矩并产生驱动力 B(承受汽车的总质量 C(缓冲减振 D(控制汽车的行驶方向 91(轿车车架一般是采用( A )车架 A(无梁式 B(中梁式 C(综合式 D(边梁式 92(越野汽车的后桥属于( C )。 A(转向桥 B(转向驱动桥 C(驱动桥 D(支持桥 93(前轮前束由( B )。 A(调整转向节臂来保证 B(调整转向横拉杆来保证 C(调整转向节来保证 D(调整转向直拉杆来保证 94(悬架把车架和车轮( B )的联接起来。 A(刚性 B(弹性 C(塑性 D(柔性 95(以下那个部件不属于转向传动机构( C ) A(转向摇臂 B(转向节臂 C(转向轮 D(转向横拉杆 96(齿轮齿条式转向器的齿轮齿条成( C )啮合 A(有间隙 B(边度 9of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(无间隙 D(滑动 97(下列哪个故障不会导致动力转向助力不足。( D ) A(液压油面过低 B(转向泵泵油能力不足 C(转向器内泄露过大 D(转向器齿条调整过松 98(下面哪个信号不是电动助力转向系统ECU需要的。( D ) A(车速传感器 B(方向盘转角传感器 C(方向盘转速传感器 D(转速传感器 99(汽车高速行驶时感到方向不稳、摆振的原因是( D )。 A(前束过大 B(车轮外倾角过大 C(主销后倾角过大 D(轮胎动不平衡 100(汽车涉水后，制动效能( B )。 A(不受影响 B(下降 C(严重下降 D(不能恢复 101(汽车制动时，制动力的大小取决于( D )。 A(真空助力器的力 B(制动力矩 C(轮胎与地面的摩擦力 D(轮胎与地面的附着条件 102(关于ABS，下列说法哪个错误。( C ) A(可将车轮滑动率控制在较为理想的范围内 B(可使制动力最大 C(在积雪路面，可使制动距离缩短 D(可提高轮胎寿命 103(下列那个不是产生ABS间歇性故障的原因( D )。 A(插头接触不良 B(制动管路中存在空气 C(系统电压不稳定 D(电磁阀损坏 104(驻车制动器和车轮处于一体，制动力作用在( C )上。 A(转向器 B(车桥 C(车轮 D(悬架 105(盘式制动器最显著的优点是( B )。 A(制动力大 B(热稳定性好 C(具有助式作用 D(维修复杂 106(驾驶过程中，急踩刹车，车轮抱死，可以初步判定:( C )。 A(真空助力泵不工作 B(车速传感器工作异常 C(ABS不工作 D(制动液不够 107(具有防滑控制制动系统的汽车，其防滑调节是在以下何种情况下起作用( C )。 A(低速 B(高速 C(任何车速 D(ABS不工作时 10e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 108(汽车车辆识别代码(VIN)总共有( B )代码组成。 A(16位 B(17位 C(18位 D(19位 109(汽车布置形式FR表示( A )。 A(发动机前置、后轮驱动 B(发动机前置、前轮驱动 C(发动机后置、后轮驱动 D(发动机中置、后轮驱动 110(汽车动力性指标主要有最高车速、( B )、最大爬坡度。 A(平均车速 B(加速时间 C(平均加速度 D(制动协调速度 111(柴油机排放的主要有害成是( D )。 A(CO B(HC C(NOX D(炭烟 112(汽车行驶时，如驱动力和行驶阻力相等，汽车处于( C )状态。 A(加速行驶 B(减速行驶 C(等速行驶 D(变速行驶 113(发动机是将某一种形式的能量转变成( C )的机器。 A(势能 B(电能 C(机械能 D(热能 114(发动机按照进气系统是否采用增压方式可分为增压式和( A )发动机。 A(非增压式 B(电动式 C(机械式 D(水冷式 115(过量空气系数是指( A )。 A(实际进入气缸内的空气量与喷入气缸内的燃料完全燃烧所需理论空气的质量比 B(气缸内的实际空气量与吸入气缸内的可燃混合气的质量比 C(气缸内的实际空气量与喷入气缸内的燃油量的质量比 D(气缸内的可燃混合气量与喷入气缸内的燃油量的质量比 116(下列说法正确的是。( D ) A(一根曲轴的曲柄数目等于气缸数 B(一根曲轴的连杆轴颈数目等于气缸数 C(一根曲轴的主轴颈等于气缸数 D(许多曲轴的内部开有机油道 117(四行程发动机一个工作循环曲轴旋转二周，凸轮轴旋转( B )。 A(2周 B(1周 C(1,2周 D(4周 118(二冲程发动机完成一个工作循环需要活塞运动( C )行程。 A(1个 B(1(5个 C(2个 D(4个 119(发动机排量指各缸的( B )之和。 opera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead11of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service func A(气缸总容积 ,(气缸工作容积 ,(燃烧室容积 D(进气量 120(下列说法正确的是。( B ) A(干式气缸套外壁直接与冷却水接触 B(干式气缸套壁厚比湿式气缸套薄 C(干式气缸套安装后比湿式气缸套强度和刚度差 D(干式气缸套比湿式气缸套散热好 121(提高( A )可以提高充气效率。 A(进气终了压力 B(进气终了温度 C(排气终了压力 D(排气终了温度 122(6135Q柴油机的缸径是( D )。 A(61mm B(613mm C(13mm D(135mm 123(根据GB/T725—1991规定:内燃机型号中部由( A )、冲程符号、气缸排列形式符号和缸径符号等组成。 A(缸数符号 B(车身符号 C(厂家代号 D(车型符号 124(内燃机气缸活塞的运动是( A )。 A(往复直线运动 B(往复旋转运动 C(振动 D(摆动 125(当活塞从上止点向下止点运动时，其速度变化规律是:从零开始，逐渐增大，临近中间时为( B )，然后又逐渐减少到零。 A(最小值 B(最大值 C(为零 D(不变 126(气缸体上部有一个或数个为活塞在其中运动作导向的圆柱形空腔，称为( B )。 A(气体 B(气缸 C(圆柱体 D(曲轴箱 127(龙门式曲轴箱的特点是( A )。 A(曲轴轴线高于缸体下平面 B(曲轴轴线低于缸体下平面 C(曲轴轴线与缸体下平面在同一平面上 D(没有任何关系 128(气缸修理尺寸=汽缸( B )磨损直径+镗、磨余量。 A(最小 B(最大 C(平均 D(有效 129(发动机气缸磨损的检验，主要测量其( D )。 A(直线度和同轴度 B(平行度和平面度 C(垂直度和圆跳动 D(圆度和圆柱度 130(气缸盖的主要作用之一是封闭( B )。 A(上部 B(缸体 C(气缸 D(曲轴箱 131(在将气缸盖用螺栓固定在气缸体上，拧紧螺栓时，应采取下列哪种方法( A )。 A(由中央对称交叉地向四周分几次拧紧 B(由中央对称地向四周分一次拧紧 C(由四周向中央分几次拧紧 D(由四周向中央分1次拧紧 132(湿式气缸套压入后，与气缸体上平面的关系是( A )。 structure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead12e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban gree A(高出 B(平齐 C(低于 D(没要求 133(油底壳的主要功用是储存( D )和封闭机体或曲轴箱。 A(汽油 B(柴油 C(冷却水 D(机油 134(在打开气缸盖罩时，应有一付防漏油的塑料胶圈，其为( A )性件，在维修工序当中应更换。 A(1次 B(2次 C(多次 D(没要求 135(在装复油底壳时应对紧固螺丝施加( A )的扭力，不可太紧防挤伤密封垫。 A( 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 B(较小 C(较大 D(没要求 136(一般柴油机活塞顶部多采用( C )。 A(平顶 B(凸顶 C(凹顶 D(A和B和C均可 137(下列说法正确的是( C )。 A(活塞顶的记号用来表示发动机功率 B(活塞顶的记号用来表示发动机转速 C(活塞顶的记号可以用来表示活塞及活塞销的安装和选配要求 D(活塞顶的记号用来表示连杆螺钉拧紧力矩 138(活塞顶上标有一定的记号，装配时记号必须朝向发动机的( A )。 A(前方 B(后方 C(不同的发动机有不同规定 D(中间 139(连杆大头与曲轴的连杆轴颈相连。大头一般做成( B )。 A(整体式 B(分开式 C(干式 D(湿式 140(( D )的主要作用是刮油和辅助密封。 A(气环 B(扭曲环 C(桶面环 D(油环 141(将机油泵入燃烧室最严重的活塞环是( A )。 A(矩形环 B(扭曲环 C(锥面环 D(梯形环 142(活塞销与活塞销座孔及连杆小头的连接方式有( A )。 A(全浮式和半浮式 B(锁销式和锁孔式 C(固定式和活动式 D(连杆式和连轴式 143(当活塞环有三道气环时，各开口应相互错开( B )。 A(90? B(120? C(180? D(360? 144(?形发动机曲轴的曲拐数等于( B )。 A(气缸数 B(气缸数的一半 C(气缸数的一半加l D(气缸数加1 145( 四冲程直列四缸发动机发火次序——发火间隔角应为( A )。 A(180º B(270º C(360º D(540º 146(曲轴弯曲常采用冷压校正法，校正后还应进行( A )。 tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead13of peripheral green space and protection of historicalction A(时效处理 B(淬水处理 C(正火处理 D(表面热处理 147(( A )的功用是按照发动机要求，定时开闭进、排气门，吸入新鲜气体，排除废气。 A(配气机构 B(燃油供给系统 C(冷却系统 D(曲柄连杆机构 148( 当采用双气门弹簧时，两气门的旋向( B )。 A(相同 B(相反 C(无所谓 D(不一定 149(下述各零件不属于气门传动组的是( C )。 A(摇臂 B(推杆 C(气门弹簧 D(挺柱 150 ( 在发动机中，( D )用来密封气道。 A(凸轮 B(挺住 C(推杆 D(气门 151(当发动机冷却液的温度超过90?C时，冷却水( B ) 。 A(全部进行小循环 B(全部进行大循环 C(大、小循环同时进行 D(不一定 152(总成送修时应在装合状态，附件、零件均不得( B )。 A(拆换和变形 B(拆换和短缺 C(损伤和短缺 D(损伤和变形 153(现代汽车电控燃油喷射系统中，燃油压力调节器的作用是( B )。 A(保持供油压力不变 B(保持喷油器内外压差恒定 C(减少燃油脉动 D(储存压力 154( 发动机在冷车时较难起动，最可能的故障是( D )。 A(进气温度传感器故障 B(进气歧管绝对压力传感器故障 C(节气门位置传感器故障 D(发动冷却液温度传感器故障 155(对于进厂大修发动机，检验接受时不需要进行的环节有( C )。 A(检验评定技术状况 B(填写进厂检验单 C(分解发动机 D(签定修理 合同 劳动合同范本免费下载装修合同范本免费下载租赁合同免费下载房屋买卖合同下载劳务合同范本下载 156(在发动机润滑系中，凸轮轴轴颈采用( B )润滑。 A(飞溅 B(压力 C(自然 D(滴油 157(发动机润滑系中润滑油的正常油温为( D )。 A(40~50? B(50~70? C(70~90? D(大于100? 158(机油粗滤器上装有旁通阀，当滤芯堵塞时，旁通阀打开，( C )。 city to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead14e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade ci A(使机油不经过滤芯，直接流回油底壳 B(使机油直接进入细滤器 C(使机油直接进入主油道 D(使机油流回机油泵 159(转子式机油泵工作时，( A )。 A(外转子转速低于内转子转速 B(外转子转速高于内转子转速 C(内、外转子转速相等 D(内、外转子转速不确定 160(正常工作的发动机，其机油泵的限压阀应该是( A )。 A(经常处于关闭状态 B(热机时开，冷机时关 C(经常处于溢流状态 D(热机时关，冷机时开 161(发动机润滑系中，润滑油的主要流向是( B )。 A(机油集滤器?机油泵?粗滤器?细滤器?主油道?油底壳 B(机油集滤器?机油泵?粗滤器?主油道?油底壳 C(机油集滤器?机油泵?细滤器?主油道?油底壳 D(机油集滤器?粗滤器?机油泵?主油道?油底壳 162(下列符号中表示强制国家标准的是( C )。 A(GB/T B(GB/Z C(GB D(GB/A 163(下列图样比例当中表示放大比例的是( C )。 A(1:1 B(1:2 C(2:1 D(2:2 164(机械图样中一般不标注单位，默认单位是( A )。 A(mm B(m C(cm D(um 165(机械图样中重合断面图的轮廓线用( D ) 画出。 A(粗实线 B(细实线 C(细点画线 D(波浪线 166(机械图样中汉字应写成( C )体，采用国家正式公布的简体字。 A(新宋 B(隶书 C(长仿宋 D(方正舒 167(下列投影法中不属于平行投影法的是( A )。 A(中心投影法 B(正投影法 C(斜投影法 D(以上都不对 168(在三视图中，主视图反映物体的( B )。 A(长和宽 B(长和高 C(宽和高 D(以上都不对 169(三视图是采用( A )得到的。 district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead15of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera A(中心投影法 B(正投影法 C(斜投影法 D(以上都不对 170(132?0(0125的公差为( D )。 A(0(0125 B(-0(0125 C(0 D(0(025 171(零件图主视图选择原则主要是( C )。 A(形状特征原则 B(加工位置原则 C(工作位置原则 D(以上答案均正确 172(在零件图中，尺寸基准根据其作用分为( A )两类。 A(设计基准和工艺基准 B(长宽高基准 C(主要基准和辅助基准 D(合理基准和不合理基准 173(表面粗糙度中，Ra的单位为( D )。 A(米 B(厘米 C(毫米 D(微米 174(图样中的尺寸一般以( D )为单位时，不许标注其计量单位付号，若采用其他计量单位时，必 须标明。 A(Km B(dm C(cm D(mm 175(图样是工程技术界的(B ),它既是人类语言的补充，也是人类的智慧和语言在更高发展阶段上 的具体体现。 A(文字 B(语言 C(图片 D(尺度 176 (已知空间点A(10，15，0 )，该点在( A )上。 A(H面 B(Y轴 C(V面 D( W面 177(三投影面体系由三个相互( A )的投影面所组成。 A(垂直 B(倾斜 C(平行 D(交叉 178(在机械图样中在绘制三视图时以主视图为准，俯视图在它的( A )。 A(下面 B(左面 C(前面 D(右面 179(在机械图样中用于确定线段的长度、圆弧的半径或圆的直径和角度的大小等的尺寸称为( A )。 A(定形尺寸 B(长度尺寸 C(高度尺寸 D(宽度尺寸 180(下面选项中全是基本体的是( D )。 A(棱柱、棱锥、圆台、球 B(棱锥、圆台、圆锥、球 C(棱台、棱锥、棱柱、圆台 D(棱柱、球、棱锥、圆锥 structure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead16e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban gree 181(在机械图样中组合体的三视图中不可见部分的轮廓线用( B )表示。 A(粗实线 B(虚线 C(点画线 D(细实线 182(在机械图样中表示组合体外形大小的尺寸( C )。 A(定形尺寸 B(定位尺寸 C(总体尺寸 D(参考尺寸 183(在机械图样中画旋转剖视图时应( B )。 A(先旋转后剖切 B(先剖切后旋转 C(只剖切不旋转 D(以上说法都不正确 184(普通螺纹的代号用( B )表示。 A(Tr B(M C(R D(F 185(在机械图样中单个齿轮的规定画法一般用( B )个视图表达。 A(一 B(二 C(三 D(四 186(在机械图样中外螺纹在规定画法中小径用( B )绘制。 A(粗实线 B(细实线 C(波浪线 D(中心线 187(螺纹的公称直径指的是( A )。 A(大径 B(小径 C(中径 D(直径 188(普通平键的( C )是工作面。 A(底平面 B(顶平面 C(两侧面 D(后端面 189(圆柱齿轮传动用于两( C )轴间的传动。 A(相交 B(平行 C(交叉 D(垂直 190(滚动轴承是( B )部件。 A(装配 B(组合 C(标准 D(非标准 191(键、销都属于( B )。 A(一般零件 B(标准件 C(零部件 D(常用件 192(螺纹的螺距用字母( A )表示。 17of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(P B(T C(N D(S 193(普通螺纹常用于( D )。 A(连接管道 B(传递动力 C(单方向传递动力 D(连接零件 194(在装配图中，当不需要确切地表示滚动轴承的形状和结构时，可采用( A )来绘制。 A(简化画法和规定画法 B(视图 C(剖视图 D(断面图 195(两圆柱齿轮轴线之间的最短距离称为 ( D )。 A(全齿高 B(齿距 C(分度圆 D(中心距 196(铸件必须有( A )。 A(铸造圆角 B(倒角 C(退刀槽 D(凸台 197(合理的标注尺寸要求( B )。 A(尺寸链要封闭 B(尺寸链中有一个开口环 C(主要尺寸间接获得 D(不考虑测量问题 198(,×Φ,表示直径为,?均匀分布的四个( C )。 A(螺孔 B(沉孔 C(光孔 D(锥销孔 199(表面质量要求越高，( B )。 A(表面粗糙度取值就越大 B(表面粗糙度取值就越小 C(加工工艺越简单 D(加工成本越低 200(基本偏差是指( C )。 A(上偏差 B(下偏差 C(靠近零线的偏差 D(远离零线的偏差 201(生产实际中，基准制优先采用( B )。 A(基轴制 B(基孔制 C(间隙配合 D(过渡配合 202(圆柱度公差属于( D )。 A(定向公差 B(定位公差 C(跳动公差 D(形状公差 203(为了便于读图和图样管理，装配图上所有的零、部件都必须编写序号，并在标题栏上方编制相应 的( D )。 18e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(标题栏 B(序号 C(技术要求 D(明细栏 204(同一零件在各视图上的剖面线方向和间隔( A )。 A(必须一致 B(必须相反 C(可以不一致 D(任意方向 205(轴套类零件有径向尺寸和轴向尺寸。径向尺寸的设计基准为( C )。 A(左端面 B(右端面 C(轴线 D(轴肩 206(力学中的平衡，是指物体相对地面保持( D )的状态。 A(静止 B(匀速直线运动 C(等加速运动 D(A和B 207(力对物体的作用效果取决于力的( D )。 A(大小 B(方向 C(作用点 D(三要素 208(力可用一条有向线段来表示，所以力是( A )。 A(矢量 B(代数量 C(箭头量 D(以上都不正确 209(工程上常将受两个力作用而平衡的构件称为( A )。 A(二力构件 B(平衡构件 C(对称构件 D(以上都不正确 210(两物体间的相互作用力总是相等、反向、共线，这个公理是( B )。 A(二力平衡公理 B(作用力与反作用力公理 C(平行四边行公理 D(约束与反约束公理 211(平面汇交力系的平衡条件是( B )。 A(主矩为零 B(合力为零 C(主矩和主矢均为零 D(以上都不正确 212(一物体受到两个共点力的作用，无论是在什么情况下，其合力( D ) 。 A(不大于两个分力大小的和 B(至少比一个分力大 C(不小于两个分力大小的差 D( 随两个分力夹角的增大而增大 213(力矩的国际制单位是( C )。 A(N B(Kgf C(N(m D(N/m 214(一般规定:力矩使物体绕矩心作( A )方向转动时，力矩为负。 19of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(顺时针 B(逆时针 C(平面内 D(垂直平面 215(固定端约束的约束反力是( C )。 A(沿公法线方向指向物体 B(方向不定，用两个垂直分力来表示 C(两个正交分力和一个力偶 D(一个力偶，限制物体的转动 216(在机械工程中,机构和机器统称为( A )。 A(机械 B(构件 C(部件 D(运动副 217(组成机械的独立运动单元是( B )。 A(零件 B(构件 C(部件 D(机器 218(两构件直接接触并能保持确定相对运动的构件组合称为( C )。 A(运动链 B(部件 C(运动副 D(铰链 219(凸轮副属于( A )。 A(高副 B(低副 C(移动副 D(转动副 220(在自行车中,脚踏板与车身所组成的的运动副为( C )。 A(移动副 B(高副 C(转动副 D(螺旋副 221(具有确定相对运动构件的组合称为( C )。 A(机器 B( 机械 C(机构 D( 构件 222(下面不属于虚约束特点的是( D ) 。 A(对机构的运动没有影响 B(改善机构的受力情况 C(增加构件的刚度 D(实际约束 223(铰链四杆机构中的曲柄是作( A )运动。 A(整周回转 B(往复摆动 C(往复直线 D(间歇运动 224(在曲柄摇杆机构中，若曲柄为主动件，且作等速转动时，则从动件摇杆一般作( B )。 A(往复等速转动 B(往复变速转动 C(往复变速摆动 D(往复等速摆动 225 (平面四杆机构中，是否存在死点，取决于( B )是否与连杆共线。 A(主动件 B(从动件 city to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead20e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade ci C(机架 D(摇杆 226(机构压力角α愈( B )，传动角γ愈大，机构传力性能愈好。 A (大 B(小 C(接近20? D(接近30? 227( 以下属于凸轮机构的应用的是( A )。 A(内燃机的配气机构 B(缝纫机脚踏板机构 C(汽车自动卸料机构 D.内燃机的曲柄连杆机构 228(下面属于齿轮传动机构的特点是( A )。 A(瞬时传动比恒定 B(传递动力小 C(传动效率低 D(适用于远距离传动 229(一对齿轮传动，若两齿轮齿数Z1=25,Z2=60，则齿轮传动的传动比为( C )。 A(0.4 B(2 C(2.4 D(4.1 230(齿轮传动的传动比，与两齿轮的( C )成反比。 A(模数 B(压力角 C(齿数 D(齿距 231(外啮合圆柱齿轮传动,其主、从动轮的转向是( B )。 A(相同 B(相反 C(同时指向节点 D(遵循左右手定则 232(一对渐开线标准齿轮在标准安装情况下,中心距等于两齿轮的( A )半径之和。 A(分度圆 B(基圆 C(齿根圆 D(齿顶圆 233(满足正确啮合条件的一对直齿圆柱齿轮，其模数( A )相同。 A(一定 B(不一定 C(一定不 D(以上都不正确 234(汽车变速箱的齿轮为硬齿面齿轮，常采用20CrMnTi来制造，应进行( D )，使齿面具有足够 的硬度。 A(调质 B(正火 C(表面淬火 D(渗碳淬火 235(对于硬度和冲击韧性要求不高的一般机械，常采用45钢作为齿轮材料，并进行( A )处理。 A(调质或正火 B(退火 C(表面淬火 D(渗碳淬火 236(与直齿圆柱齿轮相比,斜齿圆柱齿轮最大的优点是( A )。 A(传动平稳,承载能力强 B(传动比大 21of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(不产生轴向力 D(以上都不正确 237(齿轮传动的润滑剂一般采用( B )。 A(润滑脂 B(润滑油 C(固体润滑剂 D(气体润滑剂 238(我国使用的工频交流电的频率为( C )。 A(45HZ B(60HZ C(50HZ D(55HZ 239(表示直流电用文字符号是( C )。 A(AC B(VC C(DC D(WC 240(正弦量的三要素( A )。 A(最大值 、角频率、 初相位 B(瞬时值、 周期、 初相位 C(有效值、 周期 、相位差 D(最大值 、角频率、 周期 241(某电阻两端电压为40V，通过电阻的电流为0(5A，则导体的电阻为 ( A )Ω。 A(80Ω B(600Ω 400Ω C(200Ω D( 242(一只电阻的阻值为3Ω，另一只为6Ω，将两电阻并联起来，其电阻值为( B )。 A(4Ω B(2Ω C(1Ω D(10Ω 243( 下列设备中，( D )通常作为电源。 A(起动机 B(电动机 C(鼓风机 D(发电机 244(汽车上常用的发电机是( B )。 A(单相交流发电机 B(三相同步交流发电机 C(直流发电机 D(三相异步交流发电机 245(熔断器在电路中主要起( B )作用。 A( 断路保护 B(过载保护 C(欠压保护 D(过压保护 246(二极管的特性是( A )。 A( 单向导电性 B( 通直流阻交流 C( 放大作用 D( 滤波 247(标有“220V ，40W”的灯泡，其中220V是指交流电压的( D )。 A( 平均值 B( 瞬时值 C( 最大值 D( 有效值 248(若三极管发射结和集电结均处于反向偏置，是( A )状态。 n spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead22e system, promoting the construction of peripheral green space and protection of historical A( 放大 B( 截止 C( 饱和 D( 都不对 249(发动机点火系中的( A )能把低压电转变成高压电。 A( 分电器 B( 电容器 C( 附加电阻 D( 点火线圈 250(点火系能产生足以击穿( C )间隙的电压。 A( 点火线圈 B( 附加电阻 C( 火花塞 D( 断电器 251(一般电路的基本组成有电源，开关，连接导线和( D ) A( 熔断器 B( 电容器 C( 电阻器 D( 负载 252(直流电动机相对交流电动机特有的装置是( B ) A( 电枢绕组 B( 换向器 C( 定子绕组 D(转子绕组 253(汽车在大雨天行驶时，刮水器应工作在( C )。 A( 点动档 B( 间歇档 C( 快速档 D( 慢速档 254( 汽车稳压电路的作用是当负载发生变化时，使其输出( B )保持稳定。 A( 电流 B( 电压 C( 电功率 D( 以上都不对频率 255(人体可长时间承受( D )以下工作电流。 A( 100mA B(80mA C( 50mA D(30mA 256(我国安全用电规定安全电压为( C )以下。 A( 56V B( 60V C( 36V D(80V 257(双极型晶体管是由( B )PN结构成的一种半导器件。 A( 1个 B(2个 C(3个 D( 4个 258(晶体三极管工作在放大状态的条件是( B )。 A( 发射结正偏,集电结正偏 B( 发射结正偏,集电结反偏 C( 发射结反偏,集电结反偏 D(发射结反偏,集电结正偏 259(汽车上常用的硅整流交流发电机采用的是( D )整流电路。 A( 单相半波 B(单相全波 ction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead23of peripheral green space and protection of historical C(单项桥式 D(三相桥式 260(晶体三极管在数字电路中主要起( C )作用。 A( 放大 B(饱和 C(开关 D(整流 261(十进制数8换算成二进制数是( D )。 A( 1010 B(1001 C(1100 D(1000 262(交流电通过全波整流电路后,所得到的输出电压是( D )。 A( 交流电压 B(稳定的直流电压 C( 脉冲电压 D(脉动的直流电压 263(晶闸管由( C )个PN结组成。 A( 1 B(2 C( 3 D(4 264(三极管如果作开关使用一般工作在( C )。 A( 截止或放大区 B(放大或饱和区 C( 截止或饱和区 D(以上都不对 265(三个阻值相同的灯泡作星形连接时，在三相四线制供电线路中，如果中线断开，则( D )。 A(3个灯泡都变暗 B(3个灯泡都变亮 C(3个灯泡都不亮 D(3个的灯泡亮度不变 266(电流的单位是( D )。 A(I B(V C(Ω D(A 267(在纯电容电路中电流超前电压( D )。 A(π/6 B(π/4 C(π/3 D( π/2 268(三极管放大作用的实质，下面说法正确的是( B )。 A( 把小能量放大成大能量 B(把小电流放大成大电流 C( 把小电压放大成大电压 D(把小功率放大成大功率 269( 整流的目的是( A )。 A( 将交流变为直流 B(将高频变为低频 C( 将正弦波变为方波 D(以上都不对 270(直流稳压电源中滤波电路的作用是( C )。 A( 将交流变为直流 B(将高频变为低频 C( 将交、直流混合量中的交流成分滤除 D(以上都不对 271(采用差分放大电路是为了 ( B )。 A( 加强电路对称性 B(抑制零点漂移 C( 增强放大倍数 D(以上都不对 n spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead24e system, promoting the construction of peripheral green space and protection of historical 272(在三相交流不对称负载星型连接中，中线的作用是 ( B )。 A( 使不对称的相电流保持对称 B( 使不对称的相电压保持对称 C( 使输出功率更大 D( 线电压与相电压同相 273(R、L、C串联电路产生谐振的条件是( B )。 A( R=XL=XC B(XL=XC C( R=XL D(R=XC 274(二极管导通后，当流过它的电流增加一倍时，它两端的电压将( B )。 A( 增加一倍 B(略有增加 C( 增加一倍以上 D(成比例增加 275(一三极管三个极的对地电位分别是6V，5(4V，9V，则该管是( A )。 A( NPN硅管 B(NPN锗管 C( PNP硅管 D(PNP锗管 276(每一级电压放大倍数均为50，则两级放大电路总电压放大倍数是( D )。 100 A( 50 B( C( 1000 D(2500 277(利用二极管的( C )可以将交流电变成直流电。 A( 放大特性 B(稳压特性 C( 单向导电性 D(滤波作用 278(在逻辑功能上，具有约束条件的触发器，只有( A )触发器。 A( RS B( JK C( D D(T 279(变压器一次、二次绕组的电压与一次、二次绕组的匝数成( A ) 关系。 A( 正比 B( 反比 C(对称 D( 不确定 280(电流的正方向规定为( C )移动的方向。 A( 负电荷 B(负离子 C( 正电荷 D(任意电荷 281(电阻串联后总电阻( A )。 A( 增大 B(减小 C( 不变 D(不能确定 282( 一个电热器从220V的电源取用的功率为1000W，如将它接到110V的电源上，则取用的功率为 (B )。 A( 125 B(250 C( 500 D(1000 tion efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead25of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constru 283(若交流电路的电流相位比电压相位超前，则电路呈( C )。 A( 电阻性 B( 电感性 C( 电容性 D( 纯电容性 284(就放大作用而言，射极输出器是一种( A )。 A( 有电流放大作用而无电压放大作用的电路 B( 有电压放大作用而无电流放大作用的电路 C( 电压和电流放大作用均没有的电路 D( 以上都不对 285( ( D )触发器可以构成移位寄存器。 A( 基本RS触发器 B( 主从RS触发器 C( 同步RS触发器 D( 边沿D触发器 286(555定时器不可以组成( D )。 A( 多谐振荡器 B(单稳态触发器 C( 施密特触发器 D(JK触发器 287(多谐振荡器有( C ) 。 A( 两个稳态 B(一个稳态 C( 没有稳态 D(不能确定 288(随机存取存储器具有( A )功能。 A( 读/写 B(无读/写 C(只读 D(只写 289(多谐振荡器可产生的波形是( B )。 A( 正弦波 B( 矩形脉冲 C( 三角波 D( 锯齿波 290(以下表达式中符合逻辑运算法则的是( D )。 A( A+A=2A B( 1+1=10 C( 0<1 D( A+1=1 291(T触发器的功能是( D ) 。 A( 翻转、置“0” B( 保持、置“1” C( 置“1”、置“0” D( 翻转、保持 292(汽车电子控制系统一般由( A )、ECU和执行机构组成。 A( 传感器 B( 火花塞 C( 点火线圈 D( 继电器 293(电子控制点火系统由( B )直接驱动点火线圈进行点火。 A( ECU B( 点火控制器 C( 分电器 D( 转速信号 n spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead26e system, promoting the construction of peripheral green space and protection of historical 294(起动时点火提前角是固定的，一般为( A )度左右。 A( 10 B( 15 C( 20 D( 30 295(下列不属于温度传感器的是( D )。 A( 热电偶 B( 热电阻 C( 热敏电阻 D( 热缩管 296(电控发动机凸轮轴位置传感器向ECU输入凸轮轴位置信号，是点火控制( B )。 A( 修正信号 B( 主控信号 C( 一般信号 D( 警告信号 297(EGR控制系统的功能是将适量的废气重新引入气缸参加燃烧，以减少( D )排量。 A( CO B( CO 2 C( HC D( NOx 298(对喷油量起决定性作用的是( B )传感器。 A( 水温传感器 B(空气流量传感器 C( 氧传感器 D( 节气门位置传感器 299(下列不属于进气管绝对压力传感器的是。( D ) A( 压敏电阻式 B( 电容式 C( 膜盒式 D( 热盒式 300(一般来说，缺少了( C )信号，电子点火系统将不能点火。 A( 进气量 B( 水温 C( 转速 D( 上止点 301(氧化锆式氧传感器只有在自身温度在( D )以上时才会正常工作。 A( 90?C B( 50?C C( 815?C D( 300?C 302(在装有( A )系统的发动机上，发生爆震的可能性增大，更需要采用爆震控制。 A( 涡轮增压 B( 废气再循环 C( 排气制动 D( 可变配气相位 303(碰撞强度传感器按安装位置分为( D )和前碰撞传感器。 A( 后碰撞传感器 B( 左碰撞传感器 C( 中央碰撞传感器 D( 右碰撞传感器 304(火花塞金属垫型爆燃传感器是在火花塞的垫圈部位装上( A )。 A( 压电元件 B( 压敏电阻 C( 光敏电阻 D( 磁感线圈 305(空燃比处于理想状态时，即过量空气系数为( D )。 A( 0(96 B( 0(98 C( 0(99 D( 1 ction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead27of peripheral green space and protection of historical 306(热线式空气流量计检测时，对着进气口吹气，输出电压信号会( A )。 A(增大 B(不变 C(减小 D(不确定 307(发动机怠速运转时，进气歧管内的压力变( C )，真空度变( )。 A( 小，小 B(大，大 C(小，大 D(大，小 308(凸轮轴位置传感器安装在凸轮轴前端，用于产生( B )信号。 A(判缸 B(点火 C(转速 D(电流 309(温度的国际单位是( C )。 A(摄氏度 B(华氏度 C(开尔文 D(度 310(霍尔式曲轴位置传感器的工作原理是( B )。 A(热电效应 B(霍尔效应 C(光电效应 D(压电效应 311(在装备电子控制自动变速器的汽车上，( B )传感器信号是变速器换挡和变矩器锁止的主要信 号。A(凸轮轴位置 B(节气门位置 C(曲轴位置 D(空气流量 312(氧化钛式氧传感器的外侧处于尾气中，内侧导入空气，两侧氧气的浓度之差会产生电动势，其中 内侧为( B )。 A(阴极 B(正极 C(阳极 D(负极 313(汽车空调控制按键“AUTO”表示( A )。 A(自动控制 B(停止 C(风速 D(温度控制 314(下列汽车空调部件中，不是热交换器的是( D )。 A(供暖水箱 B(冷凝器 C(蒸发器 D(鼓风机 315(汽车A/C工作时，每个制冷循环包括压缩、冷凝、膨胀、( A )四个工作过程。 A( 蒸发 B(做功 C(进气 D(排气 316(汽车空调系统经维修后，长时间给系统抽真空的目的是( C )。 A(使水分变成液体便于抽出 B(使空气被彻底抽出 C(使水分变成蒸气便于抽出 D(使水分变成固体便于抽出 317(在( C )状况时，自动空调电脑会切断压缩机电磁离合器的电流。 A(车外温度=设定温度值 B(车外温度?设定温度值 C(车内温度?设定温度值 D(车内温度?设定温度值 318(甲说:氯是组成R-12制冷剂的一种成分，对臭氧层有害;乙说:臭氧层对防止紫外线是重要的。 city to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead28e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade ci 请问谁的说法正确( C )。 A( 甲正确 B(乙正确 C( 甲乙正确 D(甲乙不正确 319(甲说:肥皂水检漏只能用于空调系统低压侧;乙说:空调系统不工作时，肥皂水检漏既可用于低 压侧也可用于高压侧。请问谁的说法正确( B )。 A(甲正确 B(乙正确 C(两人均正确 D(两人均不正确 320(当空调系统改换了制冷剂时，甲说:用于R-12的O形圈不须更换;乙说:用于R-134a系统的O 形圈也可用于R-12系统。请问谁的说法正确( D )。 A(甲正确 B(乙正确 C(两人均正确 D(两人均不正确 321(甲说真空泵用来清除系统中的湿气;乙说真空泵用来抽出系统中的空气。请问谁的说法正确 ( C )。 A( 甲正确 B(乙正确 C( 两人均正确 D(两人均不正确 322(若有液态制冷剂溅入人的眼睛，则应立即采取的安全措施是请问谁的说法正确( D )。 A( 立即召集有关人员开现场会说明意外事故确实会发生 B( 保持受伤者情绪稳定并使其确信事故不严重 C( 批评受伤者太不小心 D( 立即将大量的冷水清洗受伤者的眼睛 323(甲说:空调系统电路中可变电阻的作用是使鼓风机能无极变速;乙说:可变电阻的作用是能为鼓 风机提供几个档位的速度控制。请问谁的说法正确( B )。 A( 甲正确 B( 乙正确 C( 两人均正确 D( 两人均不正确。 324(甲说:车厢内的湿度是由调节冷却的空气与从加热器芯来的热空气来控制的;乙说:车厢内只需 维持适当的温度，湿度无需调节。请问谁的说法正确( A )。 A( 甲正确 B( 乙正确 C( 两人均正确 D( 两人均不正确。 325(空调器运行后，储液干燥器外壳有一层白霜，说明( B )。 A( 制冷剂过量 B( 干燥器脏堵 C( 制冷剂泄漏 D( 干燥器老化 326(测量空调系统压力时，如果低压侧压力偏低，高压侧压力正常。甲说:表明制冷剂充注不足;乙说:表示高压侧有堵塞现象。请问谁的说法正确( B )。 A( 甲正确; B( 乙正确 29of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C( 两人均正确; D( 两人均不正确。 327( 冷凝器将制冷剂热量散发到汽车外的空气中，使高温，高压的气态制冷剂冷凝成( B )液 体。A( 高压 B( 低压 C( 保压 D( 中压 328(蒸发器作用是将经过节流( A )后的液态制冷剂在蒸发器内沸腾汽化。 A( 降压 B( 升压 C( 保压 D( 高压 329(轿车空调蒸发箱总成，具有冷，暖及( C )三种功能。 A( 除湿 B( 除尘 C( 除霜 D( 除雾 330(液体制冷剂在蒸发器中低温下吸收被冷却对象的热量而( C )。 A( 液化 B(硫化 C( 汽化 D( 雾化 331(膨胀阀的感温包中填入的物质是( A )。 A( 制冷剂 B( 空气 C( 水 D( 氧气 332(维修汽车空调制冷系统，当手动高、低压阀均关闭时，可检测( B )侧的压力。 A(高压 B(高、低压 C(低压 D(以上都不对 333(制冷剂在蒸发器中的过程是( A )。 A( 吸热汽化过程 B(降温冷凝过程 C( 吸热冷凝过程 D(降温汽化过程 334(汽车空调系统的冷凝器一般安装在 ( C )。 A( 乘员舱内 B( 仪表盘下面 C( 发动机散热器的前面 D( 蒸发器附近 335(对制冷系统抽真空时，压力表的高压手阀和低压手阀的状态是( A )。 A( 都打开 B( 都关闭 C( 高压手阀打开 、低压手阀关闭 D(高压手阀关闭、低压手阀打开 336(轿车空调总成，具有制冷、采暖及( D )三种功能。 A( 除湿 B( 除尘 C( 除霜 D( 通风 337( 开汽车空调时，鼓风机只有高速而无低速，可能的原因是:( C )。 A( 鼓风机损坏 B(空调开关损坏 C( 调速电阻损坏 D(电磁离合器损坏 n spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead30e system, promoting the construction of peripheral green space and protection of historical 338(汽车空调压缩机冷冻机油的作用有( D )。 A( 润滑 B(降噪 C( 冷却、密封 D(以上都是 339(有些汽车空调将高、低压保护开关安装在储液干燥器上，在系统工作正常的情况下，高、低压保护开关的状态 ( D )。 A( 高压开关闭合，低压开关断开 B( 低压开关闭合，高压开关断开 C( 高、低压保护开关均断开 D( 高、低压保护开关均闭合 340(在讨论蒸发器温控开关的功用时，甲认为蒸发器的出风口的温度高于规定值时，压缩机才投入工 作;乙认为温控开关是对压缩机转速的高低进行控制，温度越高压缩机的转速越高。请问谁的说法 正确( A )。 A( 甲正确 B( 乙正确 C( 乙都不正确 D( 甲乙都正确 341(在过低的环境温度下，制冷显然是浪费的，为防止误操作，很多汽车空调电路上设置有( C )。 A( 水温开关 B( 除霜开关 C( 环境温度开关 D( 过热开关 342(汽车自动空调的控制系统可以进行 ( D )。 A( 温度控制 B( 鼓风机转速控制 C( 进气控制 D( 以上都是 343(在发动机不工作时加注制冷剂，应该( B )。 A( 从低压侧注入 B( 从高压侧注入 C( 可以从高、低压两侧任意注入 D(必须同时从高、低压两侧注入 344(下列部件中( D )是空调系统中吸热的部件。 A( 贮液干燥器 B( 暖风器 C( 冷凝器 D( 蒸发器 345( 针对巡航系统，甲技师说，车速传感器故障会导致巡航系统失效;乙技师说，巡航开关故障会导致巡航系统失效。请问谁的说法正确( C )。 A( 甲对 B( 乙对 C( 甲乙都对 D( 甲乙都不对 346(安全气囊的线束为了与其它线束区别一般做成( B )。 A( 红色 B( 黄色 C( 蓝色 D( 绿色 347(安全气囊为了防误爆，一般采用( B )。 district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead31of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera A( 一级门限控制 B( 二级门限控制 C( 三级门限控制 D(四级门限控制 348(安全气囊引爆时的最小安全距离为( C )。 A( 2米 B( 5米 C( 10米 D( 15米 349(一般安装在汽车驾驶室内前上方的后视镜是( A )。 A( 内后视镜 B( 外后视镜 C( 下视镜 D(化妆镜 350(( B )是ABS 中的主要执行器。 A( 电子控制单元 B( 制动压力调节器 C( 车轮转速传感器 D( 以上均不是 351(安全气囊能在汽车发生( B )时起保护司机和乘客的作用。 A(翻车时 B(前方严重碰撞时 C(前方轻度碰撞时 D(后方严重碰撞时 352(丰田车系电路图中统一符号“B+”的含义是什么( C )。 A(开关电源 B(搭铁 C(常电源线 D(信号线 353(大众车系电路图上统一代码“15”的含义是什么( A )。 A(开关电源 B(搭铁 C(常电源线 D(信号线 354(在查看插头端子编号时，母插头是如何查找的( A )。 A(从左上往右下 B(从右上往左下 C(从下往上 D(对角数 355(当点火开关置于“ON”时，故障警告灯( B )。 A(不亮 B(点亮 C(先亮后灭 D(先灭后亮 356(以下哪项是发动机电脑的英文缩写( A )。 A(ECU B(MAP C(MAF D(MPI 357( 节气门体内如有积垢或结胶，必要时可用( D )。 A(玻璃液清洗 B(喷油器清洗液清洗 C(肥皂水清洗 D(化油器清洗剂清洗 358(不需要外加电源的曲轴位置传感器是( A )。 A(电磁感应式 B(霍尔式 C(光电式 D(翼片式 32e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 359(步进电机是如何实现转子正反转的。( B ) A(改变线圈通电电流大小 B(改变线圈通电电流方向 C(改变通电线圈数 D(改变线圈通电顺序 360(VTEC技术改变的是( B )。 A(配气相位 B(气门升程 C(点火提前角 D(点火闭合角 361(如ECU没有收到转速信号，则发动机( B )。 A(能启动 B(无法启动 C(启动后熄火 D(怠速抖动 362(拆下压力调节器上的真空软管，这时燃油压力应( C )。 A(降低 B(不变 C(升高 D(视情而定 363(超速断油控制的目的是( C )。 A(降低车速 B(节约燃油 C(避免发动机“飞车”损坏机件 D(减少有害气体的排放 364(当不正常信号持续一定时间或多次出现时，ECU将( D )。 A(不会点亮故障警告灯 B(停止发动机运转 C(停止喷油 D(点亮故障警告灯 365(甲技师说，当仪表盘上的红色故障警告灯点亮时，说明发动机控制系统出现故障;乙技师说，在 调码之前可将蓄电池从电路中断开。请问谁的说法正确( A )。 A(甲正确 B(乙正确 C(甲乙都正确 D(甲乙都不正确 366(当怀疑是由于线路接触不良或元件安装不牢引发的故障时，可采用以下哪种方法再现故障( A )。 A(振动法 B(加热法 C(电器全部接通法 D(水淋法 367(当故障只在雨天、洗车后或高湿度时出现时，可采用以下哪种方法再现故障( D )。 A(振动法 B(加热法 C(电器全部接通法 D(水淋法 368(将电动汽油泵置于汽油箱内部的目的是( C )。 A(便于控制 B(降低噪声 C(防止气阻 D(没有特殊含义 369(以下属于执行器的是( D )。 A(水温传感器 B(空调开关 33of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(转速传感器 D(怠速控制阀 370(以下属于传感器的是( B )。 A(点火器 B(空调开关 C(喷油器 D(怠速控制阀 371 (在MPI(多点汽油喷射系统)中，汽油被喷入( D )。 A(燃烧室内 B(节气门后部 C(进气总管 D(进气歧管 372(进气歧管压力传感器安装在发动机的( D )。 A(进气歧管上 B(发动机机体上 C(节气门体前方的进气管道上 D(节气门体后方的进气管道上 373(进气流量传感器安装在发动机的( A )。 A(空气滤清器和节气门之间的进气管道上 B(发动机机体上 C(节气门体前方的进气管道上 D(节气门体后方的进气管道上 374(在电控燃油喷射系统中，( C )控制是最基本也是最重要的内容。 A(进气温度 B(进气量 C(喷油量 D(节气门开度 375(冷却液温度传感器线路断路，ECU检测到的信号电压为( B )。 A(0V B(5V C(12V D(不能确定 376(采用三元催化转换器必须安装( C )。 A(前氧传感器 B(后氧传感器 C(前、后氧传感器 D(以上都不正确 377( 单缸独立点火的特点是。( A ) A(每一个气缸都配有一个点火线圈 B(每两个气缸共用一个点火线线圈 C(所有气缸共用一个点火线圈 D(以上都不正确 378(以下关于故障诊断仪KT600功能不正确的是( D )。 A(读取故障代码 B(清除故障代码 C(读取数据流 D(尾气分析 379(车间管理6S中的SECURITY表示( A )。 A(安全 B(素养 C(整理 D(整顿 380(下列哪个项目不可以用尾气分析仪检测。( D ) A(CO B(HC C(NO D(HO x 2 34e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 381(下列哪一项不是喷油器清洗机的功能。 ( D ) A(检查各缸喷油量的差别 B(检查喷油器的雾化情况 C(检查喷油器滴漏 D(检查喷油压力 382(发动机中出现有故障的喷油器，不可能会出现( D )。 A(怠速时发动机熄火 B(发动机加速缓慢 C(发动机喘振 D(燃油压力上升 383(在对燃油泵电路进行检修时，可以用故障诊断仪的哪个功能对电路进行模拟测试。( B ) A(调取故障代码 B(元件动作测试 C(清除故障代码 D(调取历史故障代码 384(在燃油泵的就车检查中，将点火开关转至哪个位置。( C ) A(OFF B(ACC C(ON D(STA 385(下列哪个原因不会引起汽油发动机爆震。( B ) A(点火过早 B(发动机运转温度太低 C(发动机内积炭过多 D(发动机所用燃油的辛烷值低 386(下列不可能导致发动机加速不良的故障有( D )。 A(汽油泵的泵油量不足 B(燃油品质差 C(点火能量不够 D(变速器操纵杆变形 387(离合器安装扭转减振器是防止( B )。 A(曲轴共振 B(传动系共振 C(离合器共振 D(传动轴共振 388(在多轴驱动的汽车上，为了将变速器输入的动力分配到各驱动桥，变速器之后需安装有 ( A )。 A(分动器 B(万向传动装置 C(驱动桥 D(离合器 389(变速器要实现无冲击换挡，必须使待啮合齿轮的( C )相等。 A(受力 B(齿数 C(转速 D(圆周速度 390(车轮前束是为了调整( C )所带来的不良后果而设置的。 A(主销后倾角 B(主销内倾角 C(车轮外倾角 D(车轮内倾角 391(筒式减振器的主要作用是( B )。 A(调整车身高度 B(加速振动的衰减 C(导向作用 D(平衡作用 392(汽车行驶速度越高，转向时电控转向助力系统产生的助力作用( A )。 35of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(越小 B(越大 C(相同 D(不确定 393(鼓式车轮制动器的旋转元件是( B )。 A(制动蹄 B(制动鼓 C(摩擦片 D(制动底板 394(鼓式制动器最显著的优点是( A )。 A(制动力大 B(热稳定性好 C(结构简单 D(维修方便 395(制动管路泄漏和储液罐制动液不足，造成( A )。 A(制动失灵 B(制动拖滞 C(制动噪音 D(制动跑偏 396(制动时汽车跑偏的根本原因是( A )。 A(左右车轮制动力不相等 B(前束值不适当 C(路面附着力左右不一致 D(制动时车轮抱死 397(国产汽车编号规则中，第二、三位数字，表示( B )代号。 A(汽车类别 B(车辆参数 C(产品序号 D(企业自编 398(离合器从动盘安装在( B )上。 A(发动机曲轴 B(变速器输入轴 C(变速器输出轴 D(变速器中间轴 399(离合器主动部分是由( C )压盘、离合器盖等组成。 A(分离轴承 B(分离叉 C(飞轮 D(操作机构 400(( C )会造成汽车离合器压盘及飞轮表面烧蚀。 A(严重打滑 B(分离不彻底 C(动平衡破坏 D(踏板自由行程过大 401(下列哪个齿轮传动比表示超速档。( C ) A( 2.15 :1 B(3:1 C(0.85 :1 D(1.5:1 402(两轴式变速器的特点是输入轴与输出轴( C )，且无中间轴。 A(重合 B(垂直 C(平行 D(相交 403(惯性式同步器与常压式同步器一样，都是依靠( B )作用实现同步。 A(锁环 B(摩擦 C(齿圈 D(接合套 36e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 404(对于五档变速器而言，传动比最大的前进档是( A )。 A(一档 B(二档 C(四档 D(五档 405(A340E自动变速器无前进档，则说明可能是由于( A )打滑严重。 A(前进离合器 B(单向离合器 C(锁止离合器 D(制动器 406(下列哪项不属于汽车行驶系的组成部分( D )。 A(车架 B(悬架 C(车轮 D(动力装置 407(东风EQ1092型汽车车架是采用( D )车架 A(无梁式 B(中梁式 C(综合式 D(边梁式 408(越野汽车的前桥属于( B )。 A(转向桥 B(转向驱动桥 C(驱动桥 D(支持桥 409(东风EQ1092型汽车的前桥属于( A )。 A(转向桥 B(转向驱动桥 C(驱动桥 D(支持桥 410(汽车直线行驶时，对转向系的一个重要要求是( C )。 A(转向盘摆动 B(驾驶员随时修正方位 C(车轮自动回正 D(轻便 411(转向盘的自由行程一般不超过( B )。 A(5-10度 B(10-15度 C(10-20度 D(15-25度 412(动力转向油泵磨损会导致( A )。 A(转向沉重 B(转向异响 C(油液产生泡沫 D(汽车跑偏 413(电液式动力转向系统的动力源来自( B )。 A(电动机 B(液压泵 C(机油泵 D(电动汽油泵 414(全电子式动力转向系统的动力源来自( A )。 A(电动机 B(液压泵 C(机油泵 D(电动汽油泵 415(汽车行驶速度越低，转向时电控转向助力系统产生的助力作用( B )。 A(越小 B(越大 C(相同 D(不确定 416(以下那个是导致转向沉重的主要原因( C )。 A(前束太大 B(外倾角太大 C(主销后倾角太大 D(转向半径不正确 37of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 417(前轮前束的主要作用为( C )。 A(汽车转向轻便 B(稳定力矩，保证直线行驶的稳定性 C(补偿轮胎侧滑的不良后果 D(适应载荷变化引起的轮胎异常磨损 418((D )系可按需要使汽车减速或在最短距离内停车。 A(转向 B(行驶 C(传动 D(制动 419(下列选项中，可作为汽车制动效能评价指标的是( A )。 A(制动距离 B(制动释放时间 C(制动时间 D(制动协调时间 420(汽车驻车制动器又称( B )。 A(行车制动器 B(手制动器 C(脚制动器 D(以上答案都不对 421(ABS制动装置优点是提高制动过程中的( A )，缩短制动距离，防止侧滑和甩尾，减少轮胎磨 损。 A(方向稳定性 B(转向力矩 C(力 D(时间 422(ABS制动系统就是将滑移率控制在( C )左右，使制动效果最好，以确保行车安全。 A(0(3 B(0(1 C(0(2 D(0(5 423(( C )是防抱死制动系统的缩写。 A(ASR B(EBD C(ABS D( VDC 424(ABS失效后汽车( B )。 A(无常规制动 B(有常规制动 C(会造成间歇故障码 D(以上均错 425(盘式制动器固定在汽车车轮上的旋转元件是( D )。 A(钳形支架 B(制动块总成 C(活塞 D(制动盘 426(对液压制动的汽车连续踏几次制动踏板，始终到底且无力是因为( A )。 A(制动主缸皮碗损坏、顶翻 B(制动蹄片和制动鼓间隙过大 C(制动系统渗入空气或制动液气化 D(制动液牌号不对 427(左右车轮制动蹄回位弹簧拉力相差太大，会导致制动系( C )。 38e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(制动失效 B(制动失灵 C(制动跑偏 D(制动发响 428(汽车制动过程中如果只是后轮制动到抱死滑移而前轮还在滚动，则汽车( B )。 A(失去转向性能 B(侧滑甩尾 C(正常转向 D(调头 429(汽车制动过程中如果只是前轮制动到抱死滑移而后轮还在滚动，则汽车( A )。 A(失去转向性能 B(侧滑甩尾 C(正常转向 D(调头 430(制动时左右车轮制动力不相等会使汽车( A )。 A(跑偏 B(制动距离过长 C(路面附着力左右不一致 D(制动时车轮抱死 431(乘用车主要用于载运乘客及其随身行李物品的汽车，包括驾驶员座位在内最多不超过( C )个座位。 A(7 B(8 C(9 D(10 432(汽车的主要性能指标包括( B )、经济性能、制动性能、通过性能、汽车有害气体排放等。 A(舒适性 B(动力性能 C(安全性 D(有用性 433(发动机按完成一个工作循环所需行程数分为四行程和( A )发动机。 A(二行程 B(三行程 C(四行程 D(五行程 434(由于二行程发动机换气过程中新鲜气体损失较多，废气排除也不彻底，且气孔占据了一部分活塞行程，作功时能量损失较大，经济性( A )。 A(较差 B(较好 C(很好 D(一般 435(( C )的功用是按照发动机要求，定时开闭进、排气门，吸入新鲜气体，排除废气。 A(曲柄连杆机构 B(燃油供给系统 C(配气机构 D(冷却系统 436(发动机的工况是指发动机( A )。 A(工作状况 B(环境温度 C(负荷 D(车速 437(CA488汽油机表示其冷却方式为( D )。 A(油冷 B(风冷 C(自然冷 D(水冷 39of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 438(发动机作功行程中气体压力越大，发动机动力( A )。 A(越大 B(越小 C(不变 D(为零 439(气缸磨损最大的地方位于( D )。 A(上止点 B(下止点 C(第二缸 D(第一道活塞环上止点顶边稍下处 440(检查气缸体内部有无裂纹，就采取( B )。 A(敲击法检查 B(水压试验检查 C(气压试验检查 D(放射线同位素法检查 441(气缸盖经过修磨后，它的压缩比会( A )。 A(增大 B(不变 C(减小 D(都有可能 442(对于铝合金气缸盖，为了保证它的密封性能，在装配时，必须在( B )状态下拧紧。 A(热状态 B(冷状态 C(A，B均可 D(A，B均不可 443(为了保证活塞能正常工作，冷态下常将其裙部沿径向做成( B )的椭圆形。 A(长轴在活塞销方向 B(长轴垂直于活塞销方向 C(A、B均可 D(A、B均不可 444(活塞刮伤主要是由于活塞与气缸壁的配合间隙( A )，使润滑条件变差，以及气缸内壁严重不清洁，有较多和较大的机械杂质进入摩擦表面而引起的。 A(过小 B(过大 C(一般 D(为零 445(连杆由小头、杆身和大头三部分组成。连杆小头与( B )相连。 A(活塞头部 B(活塞销 C(活塞销座孔 D(活塞裙部 446(连杆杆身常做成( A )形断面。 A(工字 B(V C(矩 D(? 447(当连杆弯、扭变形并存时应( A )。 A(先校扭后校弯 B(先校弯后校扭 C(报废连杆 D(同时进行 448(活塞环在自然状态下是一个( B )。 A(封闭的圆环形 B(开口的圆环形 C(封闭的椭圆形 D(开口的椭圆形 40e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 449(( C )环会产生“泵油作用”。 A(扭曲环 B(油环 C(矩形环 D(梯形环 450(发动机曲轴现广泛采用( B )，可满足强度和刚度要求以及较高的耐磨性。 A(合金钢 B(球墨铸铁 C(灰口铸铁 D(特殊合金钢 451( 发动机曲轴轴颈磨损量检查可用( A )进行 。 A(千分尺 B(游标卡尺 C(百分表 D(厚薄规 452(曲轴与凸轮轴的转速比是( C )。 A(1?1 B(1?2 C(2?1 D(3?1 453(进、排气门在作功上止点时( D )。 A(进气门开、排气门关 B(进气门关、排气门开 C(进气门开、排气门开 D(进气门关、排气门关 454( 下面哪种凸轮轴布置型式最适合于高速发动机( B )。 A(凸轮轴下置式 B(凸轮轴上置式 C(凸轮轴中置式 D(顶置气门式 455(发动机一般排气门的锥角较大，是因为( A )。 A(排气门热负荷大 B(排气门头部直径小 C(配气相位的原因 D(没原因 456(下列( B )是软水。 A(自来水 B(河水 C(江水 D(海水 457(水冷却系中，冷却水的大小循环路线由( C )控制。 A(风扇 B(百叶窗 C(节温器 D(分水管 458(发动机的曲柄连杆机构采用( D )相结合的润滑方式。 A(压力润滑和滴油润滑 B(压力润滑和自然润滑 C(飞溅润滑和自然润滑 D(压力润滑和飞溅润滑 459(活塞与气缸壁之间的润滑方式是( B )。 A(压力润滑 B(飞溅润滑 C(脂润滑 D(压力润滑和飞溅润滑同时进行 460(电容式传感器不能通过改变( B )来改变电容量。 41of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(极板间距 B(磁通量 C(极板相对有效面积 D(介质的介电常数 461(电感式传感器不能测量( D )。 A(压力 B(位移 C(重量 D(温度 462(直接测量进入发动机的空气质量流量，不需要进行进气温度修正的传感器是( C )。 A(叶片式 B(光学卡门漩涡式 C(热膜式 D(超声波卡门漩涡式 463(确定发动机基本点火提前角的信号除进气量信号外，还有( A )信号。 A(发动机转速 B(冷却液温度 C(节气门位置 D(起动开关 464(NO是空气中的氮气与氧气在( D )条件下形成的。 x A(低温低压 B(高温低压 C(低温高压 D(高温高压 465(ECU根据( B )信号对点火提前角实行反馈控制。 A(车速传感器 B(爆震传感器 C(水温传感器 D(节气门位置传感器 466(一般汽车空调工作时，压缩机电磁离合器能按照车厢内温度的高低，自动分离和吸合，是受( D ) 控制。 A(低压保护开关 B(高压保护开关 C(A/C开关 D(温控开关 467(汽车空调制冷压缩机，一般来说，排气管比吸气管的直径要( C )。 A(大些 B(一样大 C(小些 D(大小不一定 468(引起制冷系统发生异响的原因主要发生在( A )。 A(压缩机 B(冷凝器 C(低压开关 D(蒸发器 469(氟利昂制冷剂R12的危害是( C )。 A(有辐射 B(有毒性 C(破坏大气臭氧层 D(破坏自然生态 470(在制冷循环蒸发过程的后期，制冷剂应呈( B )态，被吸入压缩机。 A(液 B(气 C(半液半气 D(固 471(甲说:空调系统的问题能引起冷却系统问题;乙说:冷却系统问题能引起空调系统的问题。请问 42e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 谁的说法正确,( B ) A(甲正确; B(乙正确; C(两人均正确; D(两人均不正确 472(空调系统工作时，若蒸发器内制冷剂不足，离开蒸发器的制冷剂会是以下哪一种状态( C )。 A(高于正常压力，温度较低 B(低于正常压力，温度较高 C(高于正常压力，温度较高 D(低于正常压力，温度较低。 473(空调与暖风系统延时继电器的作用是( D ) 。 A(在发动机冷却液达到预定温度之前防止加热循环 B(在发动机冷却液达到预定温度之前防止制冷循环; C(在关闭点火钥匙后将各风门回复到原位 D(在发动机起动后转速稳定之前延迟空调系统的启动。 474(空调系统BI-LEVEL档可将车内空气输送至 ( D ) 。 A(面板和下节气风门 B(面板和除霜节气风门 C(除霜和下节气风门 D(面板、下风口和除霜节气风门。 475(甲说:充注制冷剂过多可能引起压缩机噪声;乙说:加注压缩机油过多可能引起压缩机噪声。请问谁的说法正确,( C ) A(甲正确 B(乙正确 C(两人均正确 D(两人均不正确。 476(甲说:用手握住膨胀阀的感温包会导致系统的压力变化;乙说:冷却膨胀阀的感温包会使系统压力发生变化。请问谁的说法正确,( C )。 A(甲正确 B(乙正确 C(两人均正确 D(两人均不正确 477(用无压力的制冷剂润滑油容器给空调系统加油时，应该在( C ). A(充入制冷剂的过程中加入 B(测试系统是否泄漏之前加入 C(排空和抽真空操作之间加入 D(抽真空和加注制冷剂的操作之间加入 478(当诊断散热器电动风扇不工作的故障时，甲说:从电源引一根线到风扇电机，如果风扇能运转则必须更换温度开关;乙说:将温度开关短路，如果风扇能运转则必须更换此开关。请问谁的说法正确( B )。 A(甲正确; B(乙正确; C(两人均正确; D(两人均不正确。 479(在修理冷凝器时，甲说:可用溶剂清洗散热片之间的灰尘;乙说:可用梳子校直冷凝器的散热片。请问谁的说法正确( C )。 A(甲正确; B(乙正确; C(两人均正确; D(两人均不正确。 tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead43of peripheral green space and protection of historicalction 480(在修理空调压缩机离合器时，甲说:要在转盘和衔铁之间涂一层轻质润滑油;乙说:要用塞尺检查转子与衔铁之间的间隙。请问谁的说法正确( B ) A(甲正确; B(乙正确; C(两人均正确; D(两人均不正确。 481(制冷压缩机主要是吸入低温( C )的制冷剂蒸气。 A(高压 B(中压 C(低压 D(负压 482(压缩机将压缩后的高温高压的( B )制冷剂排出，送到冷凝器向外放热。 A(液态 B(气态 C(固态 D(液气混合 483(汽车低速行驶时，空调压缩机有较强的制冷能力，高速行驶时，要求低( B )。 A(油耗 B(耗能 C(损耗 D( 功耗 484(斜盘式压缩机采用往复式双头活塞，依靠斜盘旋转运动，使双头活塞获得( A )的往复运动。 A(轴向 B(径向 C(横向 D(纵向 485(在巡航控制系统中，为保证车速稳定，必须使( D ) 。 A(节气门开度不变 B(进气量不变化 C(旁通阀开度恒定 D(节气门开度允许作小幅度变化 486(在检测丰田车系SRS系统前要将蓄电池负极拆下( C )以上，主要是让备用电源彻底放电，防止操作过程中导致安全气囊误引爆。 A(60秒 B(10秒 C(20秒 D(40秒。 487(安全气囊是辅助安全系统，简称( B )。 A(ECU B(SRS C(IPC D(VTEC 488(在汽车没有发生碰撞的情况下，安全气囊的使用年限为( C )。 A(5,6年 B(15,20年 C(7,15年 D(9,10年 489(安全传感器也叫保险传感器，安装在安全气囊ECU的内部，通常有( B )。 A(一个 B(二个 C(三个 D(四个 490(安全气囊的气体发生器是利用( D )反应产生氮气充入气囊。 A(化学 B(物理 C(复合 D(热效 491(安全气囊的备用电源的储能元件是( A )。 A(电容 B(电感 44e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(电池 D(电阻 492(全球定位系统简称( C )。 A(AHS B(ITS C(GPS D(SRS 493(将蓄电池的电能转化成化学能的过程称为( D )过程。 A(施电 B(漏电 C(放电 D(充电 494(ESP 系统的功能是控制( C )，把车轮侧偏角限制在一定范围内，以抵消汽车的不稳定运动。 A(车辆的横摆力矩 B(车辆的纵摆力矩 C(车辆的制动力矩 D(发动机输出转矩 495(当ESP 检测到车辆侧向滑动时，ESP将向发动机控制模块发送一个信息，请求利用牵引力控制系统中的发动机转矩控制功能，( D )发动机的输出转矩。 A(稳定 B(限制 C(减小 D(不变 496(( D )参数不是主动式空气悬架系统的控制参数 。 A(车身高度 B(弹簧刚度 C(减振器阻尼系数 D(空气压力 497(汽车行驶时，驾驶员轻踏制动踏板产生轻微制动时，制动防抱死装置(ABS)将( D )。 A(处于减压状态 B(处于保持状态 C(减压与保持交替进行 D(不起作用 498(接通点火开关时，安全气囊指示灯亮6—10S然后熄灭，这表明( C )。 A(安全气囊控制系统有故障 B(指示灯有故障 C(安全气囊控制系统正常 D(传感器有故障 499(当交流发电机的转子转速升高时，其定子绕组感应产生的电动势将( B )。 A(降低 B(升高 C(不变 D(不确定 500(电子控制喷射系统燃油的计量与控制是通过( B )来完成的。 A(机械传动 B(电子控制单元 C(液力控制 D(电机 二、多选题 1(汽车电路图可分为( ABC )。 A(线路图 B(电路原理图 C(线路简图 D(接线图 2(在查找对应导线时，可用以下哪些方法?( AB ) A(查看端子编号 B(查看导线颜色 C(查看导线长短 D(查看导线粗细 3(下列传感器哪些不是由ECU提供基准电压( AB )。 45of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(磁电式转速传感器 B(凸轮轴位置传感器 C(进气温度传感器 D(水温传感器 4(关于导线颜色的描述哪些是正确的?( ABC ) A(“B”，黑色 B(“R”，红色 C(“W”，白色 D(“G”，棕色 5(下列关于导线“B-R”颜色的描述正确的是。( AD ) A(B是主色 B(B是辅色 C(R是主色 D(R是辅色 6(讨论丰田车系电路端子时，甲技师说“B+”是电源端子，乙技师说“E”是常电端子，下列选项正确的 是( AC )。 A(甲正确 B(乙正确 C(乙不正确 D(甲不正确 (讨论大众车系电路图时，甲技师说“30”是常电源端子，乙技师说“15”是控电端子，丙技师说“31”是7 搭铁端子，下列选项正确的是( ABC )。 A(甲正确 B(乙正确 C(丙正确 D(都不正确 8(在查看插头端子编号时，甲技师说母插头的查找方式从左上往右下，乙技师说公插头是左上往右下 数，下列选项正确的是( AC )。 A(甲正确 B(甲不正确 C(乙不正确 D(乙正确 9(下列哪些项目不可以通过OBD-?诊断接口完成( CD )。 A(读取故障码 B(读取数据流 C(读取电流 D(读取电压 10(甲技师说，当KT600缺电时，可从蓄电池取电;乙技师说，也可以直接从诊断接口取电。下列选 项正确的是( AC )。 A(甲正确 B(甲不正确 C(乙正确 D(乙不正确 11(以下关于故障代码说法正确的是( BC )。 A(由5位数字组成 B(可用综合诊断仪调取 C(蓄电池断电后自动清除 D(P表示底盘控制系统 12(下列哪种情况故障灯会点亮?( CD ) A(机油压力异常 B(油压异常 C(点火信号异常 D(进气压力信号异常 13(在讨论故障指示灯时，甲技师说当系统无故障时，故障警告灯不亮，乙技师说喷油器机械故障时故 46e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 障警告灯也不亮，下列选项正确的是( AB )。 A(甲正确 B(乙正确 C(甲不正确 D(乙不正确 14(以下哪些说法是正确的?( ABD ) A(冷启动供给的是极浓的混合气 B(暧机过程中空燃比应逐渐增大 C(小负荷工况供给的是较稀的混合气 D(发动机减速时应该供给较稀的混合气 15(可燃混合气对发动机哪些性能有影响。( ABC ) A(动力性 B(经济性 C(排放性 D(通过性 16(以下工况哪些属于过渡工况。( ABC ) A(冷启动工况 B(暧机工况 C(加速和减速工况 D(全负荷工况 17(以下工况哪些属于稳定工况。( ABC ) A(怠速和小负荷工况 B(中等负荷工况 C(大负荷和全负荷工况 D(加速和减速工况 18(热式空气流量传感器一般有哪几种形式。( CD ) A(卡门式 B(翼片式 C(热线式 D(热膜式 19(以下关于热式空气流量计说法正确的有。( AC ) A(怠速时输出信号为低电压 B(加速时输出信号电压变化缓慢 C(节气门开度增大时，信号增大 D(节气门开度增大时，信号变小 20(节气门位置传感器的三个端子分别是( ACD )。 A(供电端子 B(怠速端子 C(信号端子 D(接地端子 21(关于丰田8A发动机节气门位置传感器说法正确的是( ABCD )。 A(怠速触点用于提供怠速信号 B(供电电压为5V C(节气门全闭时，IDL-E2端子间应导通 D(节气门打开时，IDL-E2端子间应不导通 22(发动机运行时，当电脑接收到怠速信号且车速为零时，以下说法正确的是。( AD ) A(处于怠速工况 B(处于减速工况 C(喷油器停止喷油 D(无功率输出 23(曲轴位置传感器功能有。( ABD ) A(计算转速 B(计算转角 47of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(计算车速 D(确定上止点 24(曲轴位置传感器信号有异常，则可能的原因有以下哪几种。( ABCD ) A(信号盘安装不正确 B(信号盘缺齿 C(齿槽中填有异物 D(线路间隙性接触不良 25(常用的转速传感器有。( BCD ) A(翼片式 B(霍尔式 C(光电式 D(电磁感应式 26(点火系统必须满足的要求有。( ABCD ) A(提供足够高的次级电压 B(以最佳时刻进行点火 C(火花要具有足够的能量 D(应按发动机的工作顺序点火 27(关于点火系统检修说法正确的是( ABCD )。 A(高压线可通过测量电阻值来判断是否良好 B(可用跳火试验进行点火判断 C(可用二级管试灯进行点火控制信号检查 D(可以用示波器读取点火波形 28(下列不属于点火系统元器件的是( AC )。 A(灭火器 B(点火线圈 C(点烟器 D(点火模块 29(甲技师说，电脑没有收到反馈信号时，喷油器会停止喷油，乙技师说，没有点火信号时，点火系统 不会点火，下列选项正确的是( AC )。 A(甲正确 B(甲不正确 C(乙正确 D(乙不正确 30(以下哪些情况，会使怠速提高?( ABD ) A(开空调 B(电器负荷增大 C(水温升高 D(自动档汽车挂前进档 31(以下哪些系统故障会引起怠速不稳?( ACBD ) A(进气系统 B(燃油系统 C(点火系统; D(发动机机械系统 32(关于怠速控制说法正确的是。( ACBD ) A(怠速高，油耗增加 B(怠速低，油耗降低 C(怠速过低，排放增加 D(怠速过低，发动机运转不稳 33(可变气门正时技术的优点有。( AD ) A(改变了发动机中低转速下的转矩输出 B(增强了驾驶的操纵灵活性 C(改变了气门的大小 D(发动机功率可设计得更高 48e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 34(可变配气技术包括。( AD ) A(可变气门正时 B(可变点火提前角 C(可变点火闭合角 D(可变气门升程 35(发动机正常启动应具备的条件有。( ABCD ) A(正确的点火正时 B(合适比例混合气 C(正确气缸压缩压力 D(点火能量充足 36(汽油机气缸压缩压力试验操作内容有。( ABC ) A(节气门全开 B(拔上喷油器插头 C(拆下火花塞 D(拆下喷油器 37(气缸压力过低原因有( ABD )。 A(活塞环磨损 B(气门关闭不严 C(进气管漏气 D(气缸垫损坏 38(电喷发动机没有高压火花的原因有( BCD )。 A(空气流量计故障 B(曲轴位置传感器故障 C(点火控制器故障 D(发动机ECU故障 39(如点火正时不正确原因有( ABC )。 A(正时齿轮安装不正确 B(正时皮带跳齿 C(传感器信号盘安装不正确 D(气门关闭不严 40(油压调节器上的三个通口分别接( ACD )。 A(进油管 B(排气管 C(回油管 D(真空管 41(油压调节器的作用有( ABC )。 A(调节油压 B(缓冲油泵压力脉动 C(缓冲喷油器喷油引起的压力波动 D(调节喷油量 42(若燃油系统保持压力过低，应检查下列哪些项目?( BC ) A(电动汽油泵保持压力 B(汽油压力调节器保持压力 C(喷油器有无泄漏 D(汽油滤清器是否堵塞 43(甲技师说，油压调节器真空管破裂会导致油压升高，乙技师说，装有油压调节器的燃油系统，喷油 量取决于喷油器通电时间，下列选项正确的是( AB )。 A(甲正确 B(乙正确 C(甲不正确 D(乙不正确 44(减速断油控制的目的是( CD )。 A(降低水温 B(降低车速 C(节约燃油 D(减少有害气体的排放 49of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 45(甲技师说，火花塞被浸湿时，可采用清除溢流控制清除，乙技师说，当发动机转速超过允许的极限 转速时，电脑中断燃油喷射，下列选项正确的是。( AB ) A(甲正确 B(乙正确 C(甲不正确 D(乙不正确 46(以下哪些情况会点亮发动机故障警告灯?( BD ) A(氧传感器信号在0.1-0.9V之间反复变化 B(水温传感器输出电压信号低于0.1V C(不正常信号偶尔出现一次 D(Ne信号丢失 47(发动机自诊断系统功能有。( ABCD ) A(判断电控系有无故障，并存储故障码 B(自动启动失效保护功能 C(点亮故障警告灯 D(自动启动应急备用系统 48(故障诊断与排除的基本原则有。( ABCD ) A(先外后内 B(先思后行 C(先简后繁 D(代码优先 49(关于蓄电池，以下说法正确的是。( ABD ) A(蓄电池搭铁极性切不可接错 B(严禁在发动机高速运转时断开蓄电池 C(蓄电池亏电时可强行起动发动机 D(有故障码时，不要断开蓄电池 50(关于线束连接器，以下说法正确的是( BC )。 A(如不方便打开锁扣，可破皮测量 B(维修中要注意连接器的锁扣型式 C(安装时要插接到位，锁扣锁住 D(如打不开锁扣，可用力拉扯 51(关于燃油压力试验，以下说法正确的是( BCD )。 A(拆缸油路时，可不进行油压释放 B(释放油压时，可拔下油泵继电器 C(释放油压时，可拔下油泵保险 D(释放油压时，可拔下油泵插头 52(关于跳火试验，以下说法正确的是( AB )。 A(从火花情况可判断跳火能量是否良好 B(跳火时可用备用火花塞 C(跳火时可将火花塞远离缸体 D(不跳火就更换火花塞 53(间歇性故障诊断的方法有( ABCD )。 e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead50 A(振动法 B(加热法 C(电器全部接通法 D(道路实验法 54(某汽油喷射系统的汽油压过高，以下说法不正确的是( ACD )。 A(电动汽油泵的电刷接触不良 B(回油管堵塞 C(汽油压力调节器密封不严 D(油泵内泄 55(下列哪个因素会引起燃油压力过低。( ABCD ) A(燃油泵故障 B(燃油压力调节器出故障 C(燃油滤清器堵塞 D(燃油泵滤网堵塞 56(技师甲说在进行发动机进气管真空测试时，发动机应预热并在正常怠速状态运转;技师乙说应将真 空表连接到位于节气门后方的真空源上来测量。下列选项正确的是。( AB ) A(甲正确 B(乙正确 C(甲不正确 D(乙不正确 57(下列属于点火系统控制内容的是( ABD )。 A(爆震控制 B(闭合角 C(喷油量 D(点火提前角 58(以下不属于执行器的是( ABC )。 A(凸轮轴位置传感器 B(空调开关信号 C(转速传感器 D(怠速控制阀 59(以下不属于传感器的是( ACD )。 A(点火器 B(空调开关 C(喷油器 D(怠速控制阀 60(装在进气管上的传感器有( AD )。 A(进气温度传感器 B(空调开关 C(转速传感器 D(空气流量计 61(汽车发动机的控制系统有( ABCD )。 A(燃油喷射控制系统 B(点火控制系统 C(怠速控制系统 D(进排气控制系统 62(电控点火系统最基本的功能有( ABC )。 A(点火提前角控制 B(通电时间控制 C(爆燃控制 D(进气控制 63(汽车发动机的传感器有( ABCD )。 A(空气流量计 B(曲轴位置传感器 C(进气温度传感器 D(爆震传感器 64(发动机电控系统主要由什么组成( ACD )。 51of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(信号输入装置 B(电控点火系统 C(执行元件 D(电子控制单元 65(发动机电控系统的执行元件主要有( ABCD )。 A(喷油器 B(点火器 C(怠速控制阀 D(节气门控制电动机 66(在目前应用广泛采用间歇喷射方式的多点电控燃油喷射系统中，按各缸喷油器的喷射顺序可分为 ( BCD )。 A(连续喷射 B(同时喷射 C(分组喷射 D(顺序喷射 67(电控燃油喷射系统由( ABC )组成。 A(空气供给系统 B(燃油供给系统 C(控制系统 D(点火控制系统 68(属于空气供给系统元器件有( ABCD )。 A(空气滤清器 B(空气流量计 C(节气门体 D(进气管 69(属于燃油供给系统元器件有( ABCD )。 A(电动汽油泵 B(油管 C(燃油滤清器 D(喷油器 70(电控燃油喷射系统按进气量的计算方式不同可分为( CD )。 A(A型 B(C型 C(D型 D(L型 71(燃油泵电路控制的方式有( ABC )。 A(ECU控制 B(燃油泵开关控制 C(燃油泵继电器控制 D(传感器控制 72(三线式节气门位置传感器三条引出线分别表示( ABC )。 A(电源线 B(信号线 C(搭铁线 D(控制线 73(进气歧管压力传感器的作用是( BC )。 A(直接检测进气管的空气量 B(检测进气歧管的真空度 C(将压力信号转变成电信号输送给ECU D(检测进气温度 74(进气歧管压力传感器的类型有( ABC )。 A(半导体压敏电阻器式 B(真空膜盒式 C(电容式 D(开关式 52e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 75(空气流量计的类型有( ABC )。 A(叶片式 B(热式 C(卡门漩涡式 D(半导体式 76(空气流量计的作用( BC )。 A(检测进气歧管的真空度 B(直接测量进入气缸内空气质量 C(将进气量信号转换成电信号输入ECU D(检测进气温度 77(用来检测进气量的传感器有( BD )。 A(发动机转速 B(空气流量计 C(进气温度传感器 D(进气压力传感器 78( 在电控燃油喷射系统中的喷油控制有( AB )。 A(喷油正时控制 B(断油控制 C(燃油泵控制 D(喷孔截面 79(发动机运转过程中，喷油器的总喷油量由( ABC )组成。 A(喷油时间 B(基本喷油量 C(喷油量的修正量 D(喷油截面大小 80(关于丰田8A发动机节气门位置传感器信号说法正确的是( AB )。 A(随着开度增加，输出电压升高 B(随着开度增加，输出电压升高 C(随着开度增加，输出电压降低 D(随着开度增加，输出电压降低 81(节气门体主要由( ABC )组成。 A(位置传感器 B(节气门 C(怠速空气道 D(空气流量传感器 82(节气门位置传感器主要有( BCD )。 A(翼片式 B(触点式 C(线性式 D(综合式 83(曲轴位置传感器主要类型有( BCD )。 A(光电式 B(电磁式 C(霍尔式 D(触点式 84( 发动机上的温度传感器主要有( ABCD )。 A(排气温度传感器 B(冷却液温度传感器 C(进气温度传感器 D(机油温度传感器 85(冷却液温度传感器可以安装在发动机的哪些部位?( ABC ) A(缸盖的水套上 B(缸体的水套上 53of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(发动机的出水口处 D(以上都不正确 86(下面哪些原因会造成电控发动机混合气偏浓?( BC ) A(燃油压力低 B(水温传感器输出电压偏低 C(燃油压力高 D(燃油滤清器堵塞 87(氧传感器类型有( BC )。 A(氧化镁传感器 B(氧化锆传感器 C(氧化钛传感器 D(以上都不正确 88(喷油器按结构不同可分为( BCD )。 A(滑阀式喷油器 B(轴针式喷油器 C(球阀式喷油器 D(片阀式喷油器 89(按喷油器电磁线圈电阻值大小不同，可分为( BC )。 A(高电阻型23,28欧姆 B(高电阻型13,18欧姆 C(低电阻型1,3欧姆 D(低电阻型10,13欧姆 90(对于喷油器一般要进行哪几个方面的检查。( ACD ) A(喷油器电阻检查 B(喷油器压力的检查 C(喷油器滴漏检查 D(喷油器喷油量检查 91(电动燃油泵按其结构不同一般可分为( ABCD )。 A(滚柱式 B(叶片式 C(齿轮式 D(涡轮式 92(电动燃油泵按其安装方式的不同，可分为( AD )。 A(内装式 B(叶片式 C(齿轮式 D(外装式 93(汽油机电控点火系统的功能主要有( ABC )。 A(点火提前角控制 B (通电时间控制 C(爆燃控制控制 D(以上都不正确 94(电喷发动机点火系统组成主要包括( ABCD )。 A(点火线圈 B(高压线 C(火花塞 D(点火控制器 95(现在电喷发动机点火系统常用的配电方式主要有( BD )。 A(双缸独立点火 B(双缸同时点火 C(单缸同时点火 D(单缸独立点火 96(关于双缸同时点火控制，下面说法正确的是( ABC )。 A(点火线圈每产生一次高压电，使两个气缸的火花塞同时跳火 B(一个气缸处于压缩行程，是有效点火 54e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(一个气缸处于排气行程，是无效点火 D(两个气缸都处于压缩行程，都是有效点火。 97(关于点火提前角，下面说法正确的是( ABC )。 A(发动机转速升高，点火提前角增大 B(进气歧管压力高，点火提前角小 C(汽油辛烷值越高，点火提前角增大 D(以上都不正确 98(用于修正点火提前角的传感器有( ABCD )。 A(冷却液温度传感器 B(进气温度传感器 C(空调开关信号 D(爆燃传感器 99(万用表的使用注意事项有( ABC )。 A(测量电流时，不能换量程 B(选量程时，应该先大后小 C(测量电阻时，不能带电测量 D(选量程时，应该先小后大 100(讨论万用表使用时，技师甲说可以使用电阻档测元件电阻，技师乙说可以使用电阻档测量电流， 下列选项正确的是( AB )。 A(甲正确 B(乙错误 C(甲、乙都对 D(甲、乙都错 101(汽车维修常用万用表有( AB )。 A(数字式万用表 B(模拟式万用表 C(机械式万用表 D(多功能万用表 102(汽车维修常万用表能测量( ABCD )。 A(电阻 B(电流 C(电压 D(三极管 103(故障诊断仪KT600供电方式有( ABCD )。 A(OBD数据线供电 B(蓄电池电源电缆供电 C(点烟器电源电缆供电 D(稳压电源电缆供电 104(下列哪项不是故障诊断仪KT600的功能。( CD ) A(读取故障代码 B(读取故障代码 C(检测异响 D(燃油修正 105(汽车维修车间安全生产的注意事项有( ABCD )。 A(注意防火 B(切勿搬运太重的物品 C(佩戴劳保用品 D(举升车辆前先检查举升机状况 106(汽车专用示波器可以检查哪些元件?( ACD ) A(爆震传感器 B(高压线圈电阻 55of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(空气流量计 D(转速传感器 107(汽车尾气尾气分析仪可检测( ABCD )。 A(CO B(HC C(NO D(HOx2 108(在讨论喷油器清洗机的功能时，甲说它可以检查喷油器的电阻，乙说它可以检查喷油器是否滴漏， 下列选项正确的是( BC )。 A(甲正确 B(甲错误 C(乙正确 D(乙错误 109(不是混合气过稀的原因有( BD )。 A(汽油滤芯堵塞 B(燃油压力过高 C(喷油器堵塞 D(爆震传感器异常 110(混合气过浓的原因有( AC )。 A(喷油器漏油 B(燃油压力过低 C(燃油压力过高 D(汽油滤芯堵塞 111(技术员甲说燃油压力过高会导致混合气过稀，技术员乙说汽油滤芯堵塞会导致混合气过稀，下列 选项正确的是( AB )。 A(甲错误 B(乙正确 C(甲、乙都对 D(甲、乙都错 112(丰田8A发动机喷油器不工作可能的原因有( ABC )。 A(主继电器损坏 B(喷油器保险损坏 C(ECU损坏 D(油泵保险损坏 113(下列哪个部件异常会导致起动机不工作?( BD ) A(启动继电器 B(启动保险 C(P/N开关 D(油泵继电器 114(自动档的车辆，档位处于哪个位置起动机才可以工作?( BD ) A(R档 B(N档 C(D档 D(P档 115(关于电控发动机起动困难的原因，甲说可能是水温传感器故障，乙说可能是空气流量传感器故障。 下列选项正确的是( AB )。 A(甲正确 B(乙正确 C(甲、乙都对 D(甲、乙都错 116(导致发动机怠速不稳可能的原因有( ABD )。 A(油泵泵油压力不足 B(喷油器滴漏 C(主继电器断路 D(进气管漏气 56e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 117(导致发动机加速不良故障可能的原因有( ABD )。 A(空气流量计损坏 B(油压调节器损坏 C(喷油器电源保险丝烧毁 D(汽缸磨损量过大 118(导致发动机点火系统不工作故障可能的原因有( ABC )。 A(初级点火线圈短路 B(点火信号异常 C(ECU损坏 D(油泵继电器异常 119(起发动机无法启动故障可能的原因有( ABC )。 A(EFI继电器故障 B(主继电器故障 C(油泵继电器故障 D(风扇继电器故障 120(在讨论启动前检查时，甲说要检查机油液位，乙说要检查蓄电池电压，下列选项正确的是( AC )。 A(甲正确 B(甲错误 C(乙正确 D(乙错误 121(检测汽车线路断路时常用的方法( ABC )。 A(测量电压法 B(跨接线法 C(测量电阻法 D(测量电流法 122(“汽车”可英语 ( ABC ) 表示。 A(automobile B(vechicle C(car D(sedan 123(变速器可以用下列哪些 单词 英语单词 下载七年级上册英语单词表下载英语单词表下载深圳小学英语单词表 下载高中英语单词 下载 表示( AC ) 。 A(gear box B(camshaft C(transmission D(clutch 124(在英语中表示“安全气囊”的是( AC ) 。 A(SRS B(AC C(airbag D(EBD 125(key的中文含义有( AB ) 。 A(钥匙 B(键 C(代码 D(模式 126(在英语中表示“故障”的是( ABCD ) 。 A(malfunction B(trouble C(failure D(fault 127(汽车底盘由( ABC )、制动系四大系统组成。 A(传动系 B(行驶系 C(转向系 D(变速器 57of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 128(汽车行驶的驱动条件是汽车的驱动力应( A )或( C )行驶阻力之和。 A(大于 B(小于 C(等于 D(不确定 129(汽车传动系的布置形式有( ABCD )、4WD 等几种形式。 A(FR B(FF C(MR D(RR 130(汽车传动系的功用是( ABCD )。 A(将发动机发出的动力传递给驱动轮 B(具有减速、变速、倒车作用 C(具有中断动力、轮间差速作用 D(具有轴间差速作用 131(离合器由( ABC ) 、( )、( )、分离机构 和操纵机构五部分组成。 A(主动部分 B(从动部分 C(压紧装置 D(膜片弹簧 132(离合器的自由间隙是指离合器处于正常接合状态时，在( BC )与( )之间所预留的间 隙。 A(主动部分 B(分离轴承 C(分离杠杆内端 D(从动部分 133(变速器的功用有( ABCD )。 A(变速变矩 B(动力输出 C(汽车倒驶 D(中断动力传递 134(变速器操纵机构内锁止装置有( ACD )。 A(互锁 B(挂锁 C(自锁 D(倒档锁 135(同步器类型有( ABC )。 A(惯性式 B(常压式 C(自增力式 D(摩擦式 136(自动变速器的组成有( ABCD )。 A(液力变矩器 B(液压控制系统 C(齿轮变速传动装置 D(电子控制系统 137(自动变速器的换挡执行元件包括( ABC )。 A(制动器 B(离合器 C(单向离合器 D(液力变矩器 138(万向传动装置由( AD )组成。 58e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(万向节 B(主减速器 C(差速器 D(传动轴 139(万向节类型有( ABCD )。 A(十字轴万向节 B(球叉式万向节 C(球笼式万向节 D(三叉式万向节 140(汽车行驶系由( ABCD )组成。 A(车架 B(车桥 C(车轮 D(悬架 141(汽车行驶系的类型有( ABCD )。 A(轮式 B(半履带式 C(全履带式 D(车轮履带式 142(转向桥由( ABCD )等组成。 A(前轴 B(转向节 C(主销 D(轮毂 143(充气轮胎的外胎由( ABCD )组成。 A(胎圈 B(缓冲层 C(胎面 D(帘布层 144(转向系一般由( ABD )组成。 A(转向操纵机构 B(转动传动机构 C(转向开关 D(转向器 145(汽车常用的转向器型式有( ABCD )。 A(循环球式转向器 B(球面蜗杆滚轮式转向器 C(齿轮齿条式转向器 D(蜗杆曲柄指销式转向器 146( 液压动力转向系由( ABCD )组成。 A(液压泵 B(转向动力缸 C(转向阀 D(转向油罐 147(汽车方向行驶跑偏的主要原因有( AC )。 A(前轮左右轮胎气压不同 B(一侧的车轮制动分泵漏油 C(前轮定位失准 D(一侧的避震器失效 148(评价汽车制动性能的指标有( ABCD )。 A(制动力 B(制动减速度 C(制动时间 D(制动距离 149(ABS系统主要由( ABC )组成。 A(传感器 B(控制器 59of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(执行机构 D(制动总泵 150(液压制动优点是( ABCD )。 A(柔和灵敏 B(结构简单 C(使用方便 D(不耗发动机功率 151(驱动桥由( ABCD )组成。 A(主减速器 B(差速器 C(半轴 D(桥壳 152(汽车是由发动机、( ACD )四部分组成 。 A(底盘 B(起动机 C(车身 D(电气设备 153(汽车有害气体排放包括:( BCD )、二氧化硫(SO2)、醛类和微粒(含炭烟)等。 A(氧气 B(碳氢化合物 C(一氧化碳 D(氮氧化物 154(汽车主要尺寸参数包括:轴距、轮距、( ABD )、前悬和后悬等。 A(总长 B(总宽 C(总重 D(总高 155(汽车的主要技术参数指( ABC )。 A(主要尺寸参数 B(质量参数 C(性能参数 D(品质参数 156(汽车作等速直线行驶，这时汽车所受到的阻力有( ABD )。 A(滚动阻力 B(空气阻力 C(加速阻力 D(上坡阻力 157(发动机按燃料的使用不同分为( ABC )。 A(汽油机 B(柴油机 C(双燃料发动机 D(纯电动式 158(按发动机气缸的布置方式，可分为( ABCD )发动机。 A(直列式 B(对置式 C(V形 D(W形 159(现代汽车大多使用往复活塞式内燃机。它将燃料在发动机气缸内部进行燃烧，把产生的( AD ) 转变成( )。 A(热能 B(电能 C(动能 D(机械能 160(压缩比是( AC )与( )的比值。 A(气缸总容积 B(气缸工作容积 60e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(气缸燃烧室容积 D(活塞行程 161(发动机一个工作循环要经历( ABCD )行程。 A(进气 B(压缩 C(燃烧作功 D(排气 162(二冲程发动机没有( AB )，这就大大简化了它们的结构，减轻了自身的重量。 A(进气门 B(排气门 C(节气门 D(阻风门 163(柴油发动机一般由曲柄连杆机构、配气机构、燃料供给系统、( ABCD )。 A(润滑系统 B(冷却系统 C(点火系统 D(起动系 164(冷却系统的主要部件是( ABC )。 A(水泵 B(散热器 C(节温器 D(水套 165(配气机构由( CD )组成。 A(气缸 B(连杆 C(气门组 D(气门传动组 166( 4100Q-4汽油机表示四缸,( AC )，水冷车用，第四种变型产品。 A(四行程 B(二行程 C(缸径100mm D(缸径410mm 167(曲柄连杆机构由( ABC )组成。 A(机体组 B(活塞连杆组 C(曲轴飞轮组 D(气门组 168(曲柄连杆机构工作条件是( ABCD )。 A(高温 B(高压 C(高腐蚀 D(润滑困难 169(机体组的主要零件有( ABC )。 A(气缸体 B(气缸盖 C(气缸垫 D(曲轴箱 170(曲轴箱的结构形式有( ABC )。 A(平分式 B(龙门式 C(直列式 D(隧道式 171(汽油机燃烧室主要有:( ABC )。 A(楔形燃烧室 B(盆型燃烧室 C(半球形燃烧室 D(预燃室 61of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 172(气缸盖的主要功用是封闭气缸上部并与( ABD )共同构成燃烧室。 A(气缸 B(活塞 C(曲轴箱 D(气门 173(气缸盖的主要耗损形式是( ACD )。 A(裂纹 B(磨损 C(变形 D(积碳 174(清除燃烧室积碳的方法有( BC )。 A(吸尘法 B(机械清除法 C(化学清除法 D(物理清除法 175(气缸垫的作用是防止( ABC )。 A(漏气 B(漏水 C(漏油 D(漏电 176(干式缸套的特点是( ABC )。 A(壁厚较薄 B(与缸体承孔过盈配合 C(不易漏水漏气 D(易漏水漏气 177(油底壳的损伤主要有( ABCD )。 A(破裂 B(变型 C(漏油 D(放油螺栓滑扣 178(检测气缸磨损时，主要应测出气缸的( BC )。 A(活塞环的配合间隙 B(圆度 C(圆柱度 D(与活塞的配合间隙 179(发动机活塞敲缸异响的原因有 ( ABD )。 A(活塞与气缸壁间隙过大 B(活塞裙部磨损过大或气缸严重失圆 C(连杆弯曲 扭曲变形 D(轴承和轴径严重磨损 180(活塞是由( ABC )组成。 A(活塞的顶部 B(活塞的头部 C(活塞的裙部 D(活塞杆部 181(活塞的磨损的部位主要是( ABD )的磨损等。 A(活塞环槽 B(活塞裙部 C(活塞顶部 D(活塞销座孔 182(活塞的作用包括( ABC )。 A(活塞顶部与气缸盖、气缸壁组成燃烧室 B(承受气体压力 62e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(通过活塞销和连杆驱使曲轴旋转 D(往复运动 183(连杆由( ABC )组成。 A(小头 B(杆身 C(大头 D(衬套 184(斜切口连杆常用的定位方法有( ABC )。 A(止口定位 B(套筒定位 C(锯齿定位 D(螺栓定位 185(活塞连杆组主要由( ABCD )等组成。 A(活塞 B(活塞销 C(活塞环 D(连杆 186(活塞销敲击异响的原因有( CD )。 A(连杆弯曲变形 B(活塞销与连杆轴承装配过紧 C(活塞销与销座孔配合松旷 D(活塞销锁环脱落，使活塞销自由窜动 187(大修时活塞环要进行( ABCD )项检验。 A(端隙 B(侧隙 C(背隙 D(漏光度 188(止推装置有( ABCD )等多种形式。 A(翻边轴瓦 B(止推片 C(止推环 D(轴向止推滚珠轴承 189(发动机曲轴轴径的主要检测项目有( BC )。 A(弯曲变形 B(圆度误差 C(圆柱度误差 D(扭曲变形 190(曲轴的主要损伤形式有( ABC )。 A(弯曲 B(扭曲 C(断裂 D(磨损 191(汽车零部件中需做动平衡的机件是( ABC )。 A(飞轮 B(传动轴 C(曲轴 D(凸轮轴 192(配气相位包括( ABCD )。 A(进气提前角 B(进气迟关角 C(排气提前角 D(排气迟关角 193(属于气门组的有(ABCD )。 63of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(气门 B(气门座 C(气门导管 D(气门弹簧 194(配气凸轮轴的轴向定位方式有( ABCD )。 A(止推凸肩 B(止推板 C(止推螺钉 D(销钉 195(属于气门传动组的有( ABCD )。 A(挺住 B(摇臂 C(摇臂轴 D(正时齿轮 196(凸轮轴的传动方式有( ABC )。 A(齿轮传动 B(齿形皮带传动 C(链轮传动 D(马达传动 197(造成气门关闭不严的原因有( ABCD )。 A(凸轮轴与气门顶杆之间间隙过大 B(气门弹簧无力 C(气门导管间隙过大 D(气门与气门坐圈之间变形或损坏 198(柴油的发火性用( )来表示;汽油的抗爆性用( AC )来表示。 A(十六烷值 B(自燃温度 C(辛烷值 D(凝点 199(气门弹簧座的固定方式有( AB )。 A(锁片 B(锁销 C(螺钉 D(螺杆 200(在装配曲轴和凸轮轴时，必须将正时标记对准以保证正确的ABC )和( )。 A(喷油正时 B(配气正时 C(点火正时 D(不需要 201(气门由( AC )组成。 A(头部 B(底部 C(杆部 D(顶部 202(下述各零件属于气门传动组的是( ABD )。 A(摇臂 B(推杆 C(气门弹簧 D(凸轮轴 203(常用的绘图工具的有( ABCD )。 A(圆规 B(三角形 C(绘图板 D( 丁字尺 204(下列配合中属于基孔制配合的是 ( ACD )。 A(H7/k6 B(G7/n6 C(k7/h6 D(H6/k5 64e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 205(属于位置公差的符号有( AD )。 A(? B(? C(◎ D(? 206(在机械制图中粗实线一般用于绘制( ACD )。 A(可见轮廓线 B(尺寸界线 C(可见过渡线 D(引出线 207(组合体尺寸标注的基本要求为( ABC )。 A(正确 B(齐全 C(清晰 D(干净 208(一个完整的尺寸标准包括( ABCD )。 A(尺寸线 B(尺寸数字 C(尺寸界线 D(箭头 209(键的种类很多，常用的有( ABC )。 A(普通型平键 B(半圆键 C(钩头楔键 D(椭圆键 210(螺纹按用途的不同，可分为( AB )等。 A(连接螺纹 B(传动螺纹 C(梯形螺纹 D(矩形螺纹 211(常用的螺纹紧固件有( ABCD )等五种 A(螺栓 B(螺柱 C(螺钉 D(螺母 212(平面图形中所注尺寸按作用分为( BC )尺寸 。 A(定型 B(定位 C(定形 D(总高 213(属于投影面平行线的是( ABC )。 A(正平线 B(侧平线 C(水平线 D(一般直线 214(一张完整的零件图，包括( ABCD )。 A(一组图形 B(标题栏 C(技术要求 D(尺寸标注 215(左视图上只能反映零件的( BC )。 A(长 B(宽 C(高 D(总尺寸 216(主视图上只能反映零件的( AC )。 65of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(长 B(宽 C(高 D(总尺寸 217(俯视图上只能反映零件的( AB )。 A(长 B(宽 C(高 D(总尺寸 218(下列投影法中属于平行投影法的是( BC )。 A(中心投影法 B(正投影法 C(斜投影法 D(透视法 219(螺栓连接画法中，下列说法正确的是( ABC )。 A(板上的孔直径大于螺纹大径 B(螺母上有倒角 C(螺栓是不剖的 D(上下板的剖面线方向是平行 220(销在机器中主要起( AB )作用。 A(连接 B(定位 C(传递扭距 D(动力 221(装配图中标注尺寸，以下哪种尺寸需要注出。( BCD ) A(零件的制造尺寸 B(装配尺寸 C(安装尺寸 D(外形尺寸 222(基本尺寸相同，相互结合的轴和孔的配合有( ABC )。 A(过盈 B(间隙 C(过渡 D(过量 223(以下哪项可以作为尺寸基准( ABC )。 A(零件结构中的对称面 B(零件的主要支承面和装配面 C(零件的主要回转面的轴线 D(零件的次要加工面 224(表面粗糙度符号、代号一般标注在( ABD )上。 A(可见轮廓线 B(尺寸界限 C(尺寸线 D(引出线或它们的延长线上 225(下列视图中是基本视图的有( ABC )。 A(主视图 B(右视图 C(仰视图 D(局部视图 226(点划线一般用于( ABC )。 A(轴线 B(对称中心线 C(节圆 D(轮廓线 227(一般细实线用于( ABD )。 A(尺寸线 B(尺寸界线 66e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(轮廓线 D(剖面线 228(集成运算放大器是一个具有( AC )藕合的多级放大器。 A(高放大倍数 B(低放大倍数 C(直接 D(间接 229(逻辑代数中，最基本的逻辑关系有三种，即 ( ACD )。 A(与 B(与非 C(或 D(非 230(放大器的主要动态性能指标有 ( ACB)。 A(输入电阻 B(输出电阻 C(电压放大倍数 D(电源 231(异步电动机主要由 ( AC )组成。 A(定子 B(线圈 C(转子 D(齿轮 232(三相异步电动机的调速方法有( ABC。 A(变极 B(变频 C(变转差率 D(变功率 233(电阻串联的特点是( ABCD )。 A(电流相等 B(总电压等于各串联电阻电压之和 C(总功率等于各串联电阻消耗的功率之和 D(总电阻等于各串联电阻之和 234(电阻并联的特点是( ABCD )。 A(电压相等 B(总电流等于各并联电阻电流之和 C(总功率等于各并联电阻消耗的功率之和 D(总电阻的倒数等于各并联电阻的倒数之和 235(三相对称电源的特点是( ABD)。 A(大小相等 B(频率相同 C(相位相等 D(相位互差120? 236(变压器主要由( AB )组成。 A(线圈 B(铁芯 C(衔铁 D(触点 237(正弦量的三要素是( ACD )。 A(最大值 B(瞬时值 67of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(角频率 D(初相位 238(分析正弦交流电路常用的三个相似三角形是( ACD )。 A(电压三角形 B(电流三角形 C(功率三角形 D(阻抗三角形 239(汽车电路的特点是( ABCD )。 A(低压直流 B(并联 C(负极搭铁 D(单线制 240(电路正常的工作状态有( AB )。 A(通路 B(开路 C(短路 D(回路 241(电容的主要技术参数有( AB )。 A(容量 B(误差范围 C(耐压值 D(电流 242(交流发电机的特性主要有( ABC )。 A(空载特性 B(输出特性 C(外特性 D(转移特性 243(变压器的主要作用有( ABD )。 A(变压 B(变流 C(变功率 D(变阻抗 244(晶闸管导通的条件是( AC )。 A(阳极加正向电压 B(阳极加反向电压 C(门极加正向电压 D(门极不起作用 245(汽车充电机的稳压过程是( ABCD )。 A(变压器变压 B(二极管整流 C(电容滤波 D(稳压二极管稳压 246(半导体有( ABD )。 A(本征半导体 B(P型半导体 C(PN型半导体 D(N型半导体 247(晶闸管关断的方法有( ABC)。 A(减小阳极电压 B(阳极加反向电压 C(令阳极电压为0 D(拆除门极电 248(触电以人体受到伤害程度不同可分为( AB)。 A(电击 B(电伤 C(电腐蚀 D(电灼 249(三极管如果作开关使用一般工作在( BC )。 68e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(放大区 B(饱和区 C(截止区 D(可变电阻区 250(三极管的类型有( AD )。 A(PNP B(PPN C(NNP D(NPN 251(最简单的电路一般由( ABCD )组成。 A(电源 B(负载 C(连接导线 D (开关 252(半导体有( BD)两种载流子。 A(正电荷 B(自由电子 C(负离子 D(空穴 253(具有储能功能的电子元件有( BD )。 A(电阻 B(电感 C(三极管 D(电容 254(导体的电阻与( BCD )有关。 A(电源 B(导体的长度 C(导体的截面积 D(导体的材料性质 255(可用于滤波的元器件有( BD )。 A(二极管 B(电感 C(电阻 D(电容 256(功率因素与( AB )有关。 A(有功功率 B(视在功率 C(电源的频率 D(无功功率 257(基尔霍夫定律的公式表现形式为( AC )。 A(ΣI,0 B (ΣU,IR C(ΣE,IR D(ΣE,0 258(电阻元件的参数可用( AD )来表达。 A(电阻R B(电感L C(电容C D(电导G 259(通电绕组在磁场中的受力方向不能用( ABC )判断。 A(安培定则 B(右手螺旋定则 C(右手定则 D(左手定则 260(电感元件上电压相量和电流相量之间的关系不满足( ADC )。 A(同向 B(电压超前电流90? 69of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(电流超前电压90? D(反向 261(全电路欧姆定律中回路电流I的大小与( ABC )有关。 A(回路中的电动势E B(回路中的电阻R C(回路中电动势E的内电阻r0 D(回路中电功率 262(应用叠加定理来分析计算电路时，应注意( ABCD )。 A(叠加定理只适用于线性电路 B(各电源单独作用时，其它电源置零 C(叠加时要注意各电流分量的参考方向 D(叠加定理适用于电流、电压 263(下列戴维南定理的内容表述中，正确的有( BC )。 A(有源网络可以等效成一个电压源和一个电 B(电压源的电压等于有源二端网络的开路电压 C(电阻等于网络内电源置零时的入端电阻 D(戴维南定理适用于任何电路 264(电桥平衡时，下列说法正确的有( ABC ) A(检流计的指示值为零 B(相邻桥臂电阻成比例，电桥才平衡 C(对边桥臂电阻的乘积相等，电桥也平衡 D(四个桥臂电阻值必须一样大小，电桥才平衡 265(电位的计算实质上是电压的计算。下列说法正确的有( BCD )。 A(电阻两端的电位是固定值 B(电压源两端的电位差由其自身确定 C(电流源两端的电位差由电流源之外的电路决定 D(电位是一个相对量 266(三相电源连接方法可分为( AD )。 A(星形连接 B(串联连接 C(并联连接 D(三角形连接 267(电容器的电容决定于( BCD)三个因素。 A(电压 B(极板的正对面积 C(极间距离 D(电介质材料 268(每个磁铁都有一对磁极，它们是( BD )。 A(东极 B(南极 C(西极 D(北极 269(正弦交流电路中，正弦量的表达形式有( ABD )。 e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead70 A(三角函数表示式法 B(相量表示法 C(复数表示法 D(波形图表示法 270(实现A/D转换的主要步骤是( ABCD ) 。 A(采样 B(保持 C(量化 D(编码 271(数字电路按照是否有记忆功能通常可分为( AC )。 A(组合逻辑电路 B(时钟电路 C(时序逻辑电路 D(触发电路 272(半导体数码显示器的内部接法有 ( AB)。 A(共阴极 B(共阳极 C(首位相连 D(不确定 273(逻辑函数描述形式通常有( ABC)。 A(真值表 B(逻辑表达式 C(卡诺图 D(文字说明 274(以下代码中，为无权码的是( CD。 A(8421BCD码 B(5421BCD码 C(余三码 D(格雷码 275(当三态门输出高阻状态时，以下说法正确的是( AB ) 。 A(用电压表测量指针不动 B(相当于悬空 C(电压不高不低 D(测量电阻指针不动 276(汽油机工作时，严重爆燃会使( ABCD )。 A(油耗增加 B(功率下降 C(冷却液过热 D(气缸发出尖锐金属敲击声 机油变质 277(电控燃油喷射的优点是( ADC A(提高动力性 B(提高安全性 C(提高经济型 D(降低排放污染 278(汽油机的主要排放污染物是( BCD )。 A(碳烟 B(,, C(,, D(,,, 279(模拟量输出型的液位传感器主要有( ADC几种。 A(可变电阻式 B(热敏电阻式 C(电热式 D(电容式 280(进气压力传感器按信号产生的原理可分为( AC )种。 A(电压型 B(电流型 C(频率型 D(相位型 71of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 281(传感器一般由( ABCD )组成。 A(敏感元件 B(转换元件 C(转换电路 D(辅助电源 282(用万用表检测传感器的方法有( ADC。 A(电阻检测法 B(电感检测法 C(电压检测法 D(电流检测法 283(热电偶温度传感器的热电势包括( AC)。 A(温差电势 B(霍尔电势 C(接触电势 D(感应电势 284(凸轮轴位置传感器又称为( ABCD )传感器。 A(凸轮轴转角 B(相位 C(同步信号 D(判缸 285(检测发动机爆震的方法有( AC )。 A(检测汽缸压力 B(检测氧气含量 C(检测发动机震动 D(检测尾气排放 286(车速传感器主要有( ADC A(磁电式 B(压电式 C(霍尔效应式 D(光电式 287( ECU是汽车控制系统的核心，其主要作用有( ABCD )。 A(接受输入信息 B(提供参考基准电压 C(分析处理信息 D(输出执行命令 288(汽车传感器的信号有类型有( ABCD )。 A(直流 B(交流 C(频率调制 D(脉宽调制 289(汽车电子信号的判断依据有( ABCD )。 A(幅值 B(频率 C(形状 D(脉冲宽度 290(热敏电阻按半导体与温度的特性关系可分为( ABC。 A(PTC B(NTC C(CTR D(ABS 291(汽车启动时，发动机ECU根据( BC)传感器提供的信号，识别出各个汽缸活塞的位置和冲程。 A(空气流量 B(凸轮轴位置 C(曲轴位置 D(进气温度 72e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 292(轮速传感器应用于( ABCD )系统中。 A(ABS B(TCS C(EBD D(ESP 293(霍尔效应式转速床感器的优点是( ABCD ) A(不用进行转换 B(传感器电压不受轮速影响 C(不易受外界干扰 D(非接触式测量 294(霍尔效应式轮速传感器根据信号检出方式可分为( BC)。 A(单线式 B(两线式 C(三线式 D(四线式 295(热线式空气流量传感器按其热线安装位置的不同可分为( BC )两种。 A(电压测量法 B(主流测量法 C(旁通测量法 D(电阻测量法 296(空调系统储液干燥器的功能有( ABC) 。 A(储液 B(干燥 C(过滤 D(节流 297(当空调系统管路中有湿气时，可能会产生 ( BC ) 。 A(制冷剂罐堵塞 B(间歇性制冷 C(系统腐蚀 D(管路过热 298(空调系统中制冷剂加注过量，会产生 ( ABD) 。 A(蒸发器制冷不足 B(压缩机产生液击 C(制冷剂罐堵塞 D(管路过热 299(将空调压力表上两个手动阀关闭后 ( BC ) 。 A(两表均不显示系统压力 B(高压表显示高压侧压力 C(低压表显示低压侧压力 D(两表均显示大气压力 300(若空调压缩机离合器接合后，听到“哒哒”声，可能是由于( ADC) 。 A(压缩机轴承故障 B(冷凝器堵塞 C(张紧轮损坏 D(压缩机油太少 301(空调系统高压侧压力高于正常值，可能是 ( ADC A(制冷剂加注过量 B(压缩机有故障 C(冷却系统不良 D(冷凝器受阻 302(汽车电子导航系统特点有( ABC ) 。 A(实现实时位置测定 B(具有自动检索与图像放大等功能 C(自动修正车辆位置 D(防止车辆追尾 303(ESP 系统由( ABC成。 73of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(传感器 B(ECU C(执行器 D(SRS 304(下列关于CCS 的使用，下列说法正确的是( ABC。 A(交通拥堵、雨、冰、雪湿滑路面、大风天气勿用 B(汽车行驶在陡坡上最好不使用 C(踩刹车巡航自动取消 D(“CRUISE”指示灯闪烁，表明巡航正在工作 305(当防盗系统开启后受到外界触发，立即发出警报，灯光闪烁，同时切断电路的有( AC )，使 汽车瘫痪。 A(起动电路 B(门控锁电路 C(喷油电路 D(灯光电路 306(安全气囊主要由( ABCD )组成。 A(安全气囊传感器 B(安全气囊组件 C(安全带收紧器 D(电子控制装置 307(某空调系统高压侧压力偏低，而低压侧压力偏高，可能原因有( BCD) 。 A(系统的高压侧有堵塞 B(膨胀阀被卡在打开位置 C(压缩机簧片阀损坏 D(压缩机磨损 308(某空调系统高压侧和低压侧压力均偏高，可能原因有( ABD ) 。 A(冷凝器外表脏污 B(系统内有空气 C(膨胀阀开度过小 D(制冷剂过量 309( ASR控制系统为达到驱动轮防滑控制可以通过( ABCD )控制方式加以实现"。 A(发动机输出功率控制 B(驱动轮制动控制 C(差速锁止控制 D(综合控制 310(汽车上的安全气囊，其电子监控器具有迅速、准确判断各传感器传来的信息和( AB)的功能。 A(快速引爆可燃物 B(自诊断功能 C(安全 D(保护 311(电容常见的故障有( ABCD )。 A(断路 B(短路 C(漏电 D(失效 312(汽油机汽缸盖可以用( BC)制造。 A(铸钢 B(铸铁 C(铝合金 D(纯铝 313(汽油的使用性能包括汽油的( ABCD )和清洁性等。 A(蒸发性 B(抗爆性 C(防腐性 D(安定性 314(下列混合液中，属于防冻液的有( ABD)。 A(酒精—水 B(甘油—水 74e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(润滑油—水 D(乙二醇—水 315(下列视图中，属于三视图的是( ABC)。 A(主视图 B(俯视图 C(右视图 D(左视图 316(在条形磁铁中，磁性最强的部位是( AC )。 A(N极 B(中间 C(S极 D(任意部位 317(下列偏差中，可以用百分表测量的有( ABCD )。 A(平面度 B(同轴度 C(跳动量 D(间隙 318(影响汽车排放污染物的使用因素有( ABCD )。 A(混合气空燃比 B(发动机温度 C(发动机工况 D(点火时刻 319(在工作质量中，( ABCD )等因素对产品质量的形成有直接影响。 A(人 B(机器 C(原材料 D(方法和环境 320(全面质量管理的特点是( ADC。 A(全员管理 B(全社会管理 C(全企业管理 D(全过程管理 321(转向器的功用是( AD )。 A(增大转向盘传到转向轮上的转向力矩 B(减小车轮的振动 C(传递各种作用力和力矩 D(该表力的传递方向 322(汽车制动系统的功用是( ABC )。 A(按照需要使汽车减速或在最短的距离内停车 B(下坡行驶时限制车速 C(保证汽车停放可靠，不致自动滑溜 D(防止汽车行驶产生侧滑 323(蓄电池主要由( ABCD )等组成。 A(极板 B(隔板 C(电解液 D(蒸馏水 324(主销内倾角的作用是( AB )。 A(使转向轮自动回正 B(转向操纵轻便 C(提高前轮行驶的安全性 D(减少前轮的磨损 325(轮胎的功用是( ACD。 A(支撑汽车的总质量 B(改变转矩的传递方向 C(吸收及缓和汽车行驶时受到的冲击和振动 D(保证车轮与路面有良好的附着性 75of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 326(主减速器的功用是( AB )。 A(降速增扭 B(在发动机纵置时改变转矩的方向 C(增速增扭 D(增速降扭 327(行驶系的主要作用是( ABCD )。 A(支撑汽车的总质量 B(将传动系传来的转矩转化为汽车行驶的驱动力 C(承受并传递路面作用于车轮上的各种反力作用力和力矩 D(减少振动，缓和冲击，保证汽车平顺行驶 328(水冷却系的主要部件有( ABCD )。 A(散热器 B(水泵 C(节温器 D(风扇 329(离合器的功用有( ABD)。 A(使发动机与传动系逐渐接合，保证汽车平稳起步 B(暂时切断发动机与传动系的连接，便于顺利换挡 C(扩大驱动轮转矩和转速的变化范围 D(防止传动系过载 330(下列零件中，属于曲轴飞轮组的是( ABCD )。 A(曲轴 B(正时齿轮 C( 启动爪 D(皮带轮 331(汽油供给装置由( ABC组成。 A(汽油箱 B( 汽油泵 C(汽油滤清器 D(空气滤清器 332(发动机的工况有( ABCD )。 A(怠速工况 B(中等负荷工况 C(大负荷工况 D(加速工况 333(发动机上阻值随着温度的升高而降低的元件是( BC )。 A(附加电阻 B(进气温度传感器 C(冷却液温度传感器 D(排气温度传感器 334(会造成制动失效的故障是( ABC。 A(制动管路泄露 B(制动液有空气 C(制动液不足 D(制动衬片有效面积过大 335(发动机怠速不稳的原因有( ABC )。 A(个别缸不工作 B(怠速调整不当 C(进气管漏气 D(排气管漏气 76e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 336(如果缸体产生裂纹，会导致( ABCD )。 A(裂纹较大时，使发动机无法工作 B(漏水 C(漏油 D(漏气 337(发动机动力不足的原因有( ABCD )。 A(空气滤清器堵塞 B(燃油滤清器堵塞 C(点火时间过迟 D(火花塞积碳 338(冷却系的常见故障有( ABCD )。 A(开锅 B( 漏水 C(过热 D(过冷 339(曲轴轴承异响的原因有(ABC。 A(油隙过大 B( 轴向间隙过大 C( 轴承盖螺栓松动 D( 活塞销间隙过大 340(冷却系按照冷却介质不同分为( AB。 A(水冷 B( 风冷 C(油冷 D( 电冷 341(汽车前照灯由( ABD组成。 A(反射镜 B(配光镜 C(放大镜 D(灯泡 342(汽车定期维护有( ABC)。 A(一级维护 B(日常维护 C(二级维护 D(季节维护 343(汽车一级维护应以( ABC主，并检查有关制动、操纵等安全部件。 A(清洗 B(坚固 C(润滑 D(轮胎拆检、换位 344(汽车四轮定位的参数有( ABCD )。 A(主销后倾 B(前轮外倾 C(主销内倾 D(前轮前束 345(影响发动机最佳点火提前角的主要因素是( ABD A(辛烷值 B(转速 C(大气温度 D(负荷 346(如果蓄电池电解液液面过低，应及时补充( BD)。 A(自来水 B(蒸馏水 C(矿泉水 D(蓄电池补充液 347(汽油机混合气过稀会引起( ABD。 77of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead A(发动机动力下降 B(发动机回火并过热 C(排气管冒黑烟 D(发动机不易启动 348(发动机( AC)可导致汽缸拉伤。 A(缸壁不能建立油膜 B(活塞顶积炭过多 C(机油中含有杂质 D(气缸与活塞间隙过大 349(鉴定零件表层的细微伤痕裂纹等缺陷可用( ABC A(磁力探伤 B(超声波探伤 C(荧光探伤法 D(检视法 350(属于投影面垂直线的是( ABC。 A(正垂线 B(侧垂线 C(铅垂线 D(一般直线 351(在图样尺寸标注中，尺寸线终端的形式有( AB )。 A(箭头 B(斜线 C(圆点 D(直线 352(一对正确啮合的圆柱齿轮它们的( AB)必须相等。 A(模数 B(压力角 C(齿数 D(分度圆直径 353(下面视图中属于单一剖切法的是( ABD)。 A(全剖 B(半剖 C(局部剖 D(阶梯剖 354(制图国家标准规定，图框格式分为( AB)两种，但同一产品的图样只能采用一种格式。 A(不留装订边 B(留装订边 C(粗实线和细实线 D(横装和竖装 355(下列属于照明灯的有( ABD A(前照灯 B(牌照灯 C(制动灯 D(阅读灯 356(下列属于信号灯的有( BD ) A(前照灯 B(转向灯制 C(牌照灯 D(倒车灯 357(汽车防无线电电磁干扰的措施主要有( BC ) A(串联电阻 B(并联电容 C(电磁屏蔽 D(增加搭铁 358(发动机润滑油所起的作用是( ABCD )。 A(密封 B(清洗 78e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(润滑 D(冷却 359(柴油机的燃烧过程包括( ABCD )。 A(备燃期 B(速燃期 C(缓燃期 D(后燃期 360(活塞头部的作用是( ADC。 A(承受气体压力 B(润滑 C(密封 D(传热 361(下列哪一种属于形状公差( BC )。 A(平行度 B(平面度 C(圆度 D(同轴度 362(( ABC)符合国家标准的螺纹，称为标准螺纹。 A(牙型 B(直径 C(螺距 D(大小 363(组合体相邻的表面可能形成 ( ACB)三种关系。 A(共面 B(相交 C(相切 D(异面 364(线性尺寸数字一般应注写在尺寸线的( AC )。 A(上方 B(下方 C(左方 D(右方 365(螺纹有线有( AB )之分。 A(双线 B(单线 C(切线 D(螺旋线 366(下列偏差中，可用百分表测量的有( ABCD )。 A(平面度 B(同轴度 C(跳动量 D(间隙 367(自动变速器中的液力变扭器有三个工作轮它们是( ABC )。 A(导轮 B(泵轮 C(涡轮 D(滑轮 368(下列属于行星齿轮传动系的元件名称的是( ABCD )。 A(太阳轮 B(行星架 C(齿圈 D(行星轮 369(汽车液力自动变速器的液力变矩器中，当锁止离合器工作时，下列哪两个部件被连接在一起 ( CD)。 A(太阳轮 B(行星齿轮 79of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead C(泵轮 D(涡轮 370(差速器的主要作用是( AB)。 A(传递动力至左右两半轴 B(对左右两半轴进行差速 C(减速增矩 D(改变动力传递方向 371(( AB )具有保证车轮自动回正的作用。 A(主销后倾角 B(主销内倾角 C(车轮外倾角 D(车轮前束 372(半导体二极管按基片材料不同可分为( AC )。 A(硅二极管 B(钛二极管 C(锗二极管 D(锆二极管 373(当用一段导体切割磁力线时，下列说法错误的是( AD )。 A(一定有感应电流 B(有感应磁场阻碍导线运动 C(会产生感应电动势 D(有感应磁场 374(在液压传动中，属于流量阀的是( AD)。 A(节流阀 B(换向阀 C(单向阀 D(调速阀 375(在液压传动中，属于压力阀的是( ABC A(溢流阀 B(减压阀 C(顺序阀 D(调速阀 376(在液压传动中，属于方向阀的是( AB )。 A(单向阀 B(换向阀 C(顺序阀 D(调速阀 377(蓄电池的充电方法有( ABD。 A(定压充电 B(定流充电 C(初充电 D(脉冲快速充电 378(蓄电池放电终了的特征是( AC )。 A(单格电池下降到放电终了 B(电压电解液沸腾 C(电解液密度降低到最小允许值 D(端电压为0 379(影响蓄电池容量的主要因素有( ABCD )。 A(极板的构造 B(放电电流的大小 C(电解液的温度 D(电解液的密度 380(前照灯防眩目的主要措施有( ABCD )。 A(采用双丝灯泡 B(采用金属遮光罩 C(采用非对称光源 D(会车时将远光切换为近光 80e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead 381(主销内倾的作用是( AB。 A(使转向轮自动回正 B(转向操纵轻便 C(提高前轮行驶的安全性 D(减少前轮的磨损 382(行驶系主要由( ABC部件组成。 A(车架 B(车桥 C(车轮和悬挂 D(半轴和桥壳 383(变速器操纵机构主要由( ABD)等部件组成。 A(变速杆 B(拨叉及拨叉轴 C(滑动齿轮 D(锁止机构 384(汽车上的保险装置主要有( BCD。 A(继电器 B(熔断器 C(易熔线 D(断路器 385(汽车电源主要有( AD)。 A(发电机 B(起动机 C(点火线圈 D(蓄电池 386(测量蓄电池存电量的仪器有( ACB)。 A(密度计 B(高率放电计 C(万用表 D(千分尺 387(硅整流发电机按励磁绕组搭铁方式可分为( BC)。 A(前搭铁式 B(内搭铁式 C(外搭铁式 D(后搭铁式 388(蓄电池充电终了的特征是( ABD。 A(单格电池电压上升到最大值 B(电池电解液呈沸腾状态 C(端电压为12V D(电解液相对密度上升到最大值 389(起动机电磁开关的线圈有( CD )。 A(一次线圈 B(二次线圈 C(吸引线圈 D(保持线圈 390(影响起动机工作电流的主要因素有( ABC。 A(导线电阻 B(电刷接触电阻 C(蓄电池内阻 D(附加电阻 391(用万用表判断二极管，说法正确的是( ABD。 A(一般小功率晶体二极管反向电阻约为几十千欧到几百千欧 B(正向电阻一般约为几十欧到几百欧 C(正、反向电阻相差越大，表明二极管的单向导电性越差 81of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead D(若测得二极管的正、反向电阻值相近，表示二极管已坏 392(检验前照灯光束照射位置的方法有( ABC。 A(屏幕法 B(前照灯检测仪 C(投影法 D(用标准灯法 393(关于交流发电机中性点电压，以下说法正确的是( ABD)。 A(利用中性点电压可以控制充电指示灯 B(利用中性点电压可以控制继电器 C(中性点电压为零 D(中性点电压具有交流成分 394(关于起动机换向器，下列描述正确的是( ACD。 A(相邻两个换向片之间是绝缘的 B(测量相邻两个换向片之间的电阻值应为无穷大 C(测量相邻两个换向片之间的电阻值应很小 D(测量任意两个换向片之间的电阻值都很小 395(起动机中，单向离合器的作用是( AC )。 A(单向传递转矩 B(防止起动机过载 C(防止起动后发动机反拖起动机 D(以上说法都对 396(关于点火线圈，下列说法正确的是( BC)。 A(点火线圈初级绕组通电时，次级绕组产生点火电压 B(点火线圈初级绕组断电时，次级绕组产生点火电压 C(点火线圈初级电流越大，次级产生的电压越高 D(点火线圈初级电流越大，次级产生的电压越低 397(电喇叭在触点间并联了电容，其目的是( ABC。 A(灭弧 B(避免触电烧蚀 C(减小触点张开时的火花 D(使其声音悦耳 398(在用前照灯检测仪调整前照灯前，车辆必须要做的准备工作是( ABD。 A(前照灯灯罩清洁 B(轮胎气压符合标准 C(打开空调等辅助用电器 D(车辆必须停在平坦路面 399(车窗启动防夹功能的依据可能为( BC。 A(车窗电动机的运转噪声 B(霍尔传感器传送来的车窗电动机转速变化数据 C(车窗控制模块改变电流方向信号 D(电流检测电路检测到的电动机电流变化数据 400(离合器常见故障有( DCB。 A(离合器漏油 B(离合器打滑 C(离合器分离不彻底 D(离合器异响 三、判断题 e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade cicity to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead82 1(丰田车系电路图中统一代码“E”代表电源。 ( B ) 2(过量空气系数小于1时属于浓混合气。 ( A ) 3(VVT是指可变配气正时技术。 ( A ) 4(火花塞如被淹湿则有可能不能点火。 ( A ) 5(在排除发动机电控系统故障时，一般坚持代码优先的原则。 ( A ) 6(进气管绝对压力传感器输出的信号电压随着真空度增加而下降。 ( A ) 7(喷油量控制是电控燃油喷射系统最主要的控制功能。 ( B ) 8(凸轮轴位置传感器的结构、工作原理及检修过程与曲轴位置传感器基本相同。 ( A ) 9(可以用电阻档来测量保险是否正常。 (A ) 10(当水温高时，ECU会加浓混合气。 ( B ) 11(喷油器按线圈的电阻可分为阻值 13,16Ω 的高阻和阻值为 2,3Ω 的低阻。 ( A ) 12(电控发动机水温传感器损坏，将造成起动困难。 ( B ) 13(VIN码的意思是车辆识别号。 ( A ) 14(OHV为顶置气门。 ( A ) 15(4WD表示四轮驱动。 ( A ) 16(AC是空调的缩写。 ( A ) 17(r.p.m指每分钟转速。 ( A ) 18(cruise的意思是巡航系统。 ( A ) 19(fuse的意思是熔断丝。 ( A ) 20(在离合器的全部工作过程中，都不允许从动盘有打滑现象。 ( B ) 21(变速器在换档时为了避免同时挂入两档，必须装设自锁装置。 ( B ) 22(离合器踏板完全抬起，起步仍困难，是分离不彻底造成的。 ( B 23(汽车行驶速度越高，转向时电控转向助力系统产生的助力越大。 ( A ) 24(汽车转向时，转弯半径越小，转向助力越小。 ( B ) 25(动力转向油泵的皮带松动会导致转向沉重和助力不足。 ( A ) 26(轮胎充气不足不会影响转向助力效果。 ( B ) 27(汽车制动时的侧滑与跑偏无关。 ( B ) 28(制动时汽车跑偏的根本原因是左右车轮制动力相等。 ( B ) 29(制动时，若单边车轮产生抱死，汽车容易跑偏。 ( A ) 30(后轮抱死将导致汽车甩尾甚至掉头，危险性比前轮抱死更大。 ( A ) 31(ASR控制车轮的滑转，用来提高汽车的起步加速，低附着路面行驶牵引力和行驶稳定性( A ) 32(汽油机和柴油机的组成部分都有点火系统 。 ( B ) 33(6120Q表示6缸、四冲程、缸径612mm，水冷、车用发动机。 ( B ) 34(发动机连杆变弯后压缩比会增加。 ( B ) tion efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead83of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constru 35(在活塞环槽中装配气环时，若将扭曲环或锥面环装反则发动机机油耗将增加。 ( A ) 36(各种形式曲轴的曲拐数都与气缸数相同。 ( B ) 37(如果气门尾部被磨损严重，则气门间隙减小。 ( B ) 38(气门间隙是指气门与气门座之间的间隙。 ( B ) 39(润滑系主油道中压力越高越好。 ( B ) 40(润滑系中旁通阀一般都安装在粗滤器中，其功用是限制主油道的最高压力。 ( B ) 41(曲轴主轴承与轴径的配合间隙过大，则机油压力下降，油膜难以形成。所以，配合间隙越小，油膜越易形成。 ( B ) 42(节温器可以自动控制冷却水的大循环和小循环。 ( A ) 43(防冻液可降低冷却水的冰点和沸点。 (B ) 44(总成送厂大修时，应将其技术档案一并送达承修单位。 ( A ) 45(汽缸盖拆卸时为防止变形，正确的顺序为“先边后中，由外向里”。 ( A ) 46(国家制图标准规定，可见的轮廓线用虚线绘制。 ( B ) 47(机械图样中2:1是缩小比例。 ( B ) 48(正投影的基本特性是实形性，积聚性和类似性。 ( A ) 49(当一条直线垂直于投影面时，则在该面上反映实形性。 ( B ) 50(在零件图中，必须画出主视图，其他视图可以根据需要 ( A ) 51(用于确定线段在平面图形中所处位置的尺寸称为定位尺寸。 ( A ) 52(具有两个定位尺寸的圆弧叫做已知圆弧。 ( A ) 53(组合体尺寸标注的基本原则是:先标注总体尺寸，然后顺序标注各基本体的定尺寸和定位( A ) 54(局部放大图可以画成视图和剖视图，它与被放大部分的表达方式无关。 A ) 55(螺纹的公称直径指的是螺纹的大径。 ( A ) 56(当内外螺纹旋合时，旋合部分应按内螺纹画出。 ( B ) 57(螺栓连接用于连接两个较厚的零件。 ( B ) 58(圆柱销和圆锥销可作连接零件之用，但不可作定位之用。 ( B ) 59(装配图中所有的零、部件都必须编写序号，并与明细栏中的序号一致。 ( A ) 60(力对物体的作用效果不仅与它的大小有关，还与力的方向有关，因此力是矢 ( A ) 61(力的三个要素中，任意一个改变时，力的作用效果就不同。 ( A ) 62(只要刚体所受的三个力汇交于一点，则刚体一定平衡。 ( B ) 63(约束是对物体的运动起限制作用，因此约束反力的方向总是与阻碍动方向相反。 ( A ) 64(只有机构的自由度为1，机构肯定具有确定运动。 ( B ) 65(平面内的活动构件具有三个自由度。 ( A ) 66(曲柄摇杆机构中，两连架杆一个为摇杆，另一个为曲柄。 ( A ) 67(内燃机的连杆机构是曲柄滑块机构的具体应用，且它是柄为主动件。 ( B ) city to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead84e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade ci 68(行程速比系数K >1，说明机构有急回特性。 ( A ) 69(任何平面机构出现死点时，都是不利的，因此都去避免。 ( B ) 70(齿轮传动与其它传动比较，具有瞬时传动比恒定、效率高、工作可靠等特点。 ( A ) 71(电路有三种状态，通路状态、开路状态和断路状态。 ( B ) 72(汽车点火线圈是利用变压器原理制成的。 ( A ) 73(汽车上硅整流交流发电机采用的是三相桥式全波整流电路 。 ( A ) 74(半导体的导电能力不随外界条件的变化而变化 。 ( B ) 75(晶体三极管具有电流的放大能力 。 ( A ) 76(我国用电安全规程中把40V定为安全电压。 ( B ) 77(通过电阻的并联可以达到分流的目的，电阻越大，分流作用越显。 ( B ) 78(硅稳压管当反向击穿电压消失后，仍能恢复单向导电性。 ( A ) 79(电容器具有“通交流、阻直流;通高频、阻低频”的性能。 ( A ) 80(电路中参考点改变，任意点的电位也随之改变。 ( A ) 81(在实际电路中二极管发生了击穿，必须更换二极管 ( B ) 82(用三极管组成开关电路时，三极管工作在饱和状态或截止状 ( A ) 83(放大电路的输出电阻越大，其带负载能力越强。 ( B ) 84(电磁式传感器的线圈中只要存在着磁力线，就会产生感应电压。 ( B ) 85(氧传感器安装在发动机的排气管上，位于三元催化转化器之前，用于测量废气中的氧含量。 ( A) 86(双金属片气体温度传感器用于检测冷却液温度，并通过真空膜片控制冷空气和热空气的混合比例。 ( A ) 87(传感器的敏感元件是指直接感受被测量，并输出与被测量成一定关系的电信号的元件。 ( A ) 88(用于R-12和R-134a制冷剂的干燥剂是不相同的。 ( A ) 89(蒸发器表面的温度越低越好。 ( B ) 90(风机作用是将蒸发器周围的冷风吹入车内，达到降温目的。 ( A ) 91(节流孔管可以自动调节进入蒸发器的制冷剂的流量。 ( A ) 92(歧管压力表组是汽车空调系统维修中必不可少的设备。 ( B ) 93(蒸发器的作用是将液态制冷剂吸热汽化成气态制冷剂。 ( A ) 94(节流膨胀管是一种可以调节制冷剂流量的节流设备。 ( B ) 95(空调系统维修时,场地应干燥、干净、通风、无明火。 ( A ) 96(拆装空调系统管路时,必须更换新的密封圈。 ( A ) 97(只要汽车有制动，制动抱死装置(ABS)都参与工作。 ( B ) 98(三元催化转换器可以处理发动机排气中的一切污染物。 ( B ) 99(安全气囊系统中大多数气体发生器产生的气体是氨气。 ( B ) district of perfect, through live and industry with to of reasonable layout optimization city structure, improve city traffictation type upgrade simultaneously of mode, in Metro construction of while is committed to old city transformation and built ocenter" strategic vision of space frame. Yibin Center City development construction steering extension type extended and conn-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-area on a longSands expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank area, the minjiang River area, Golden East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district to the North, the East open places to space layout structure, as leading development of the city to the -of vision Yibin formation in the Center surrounded by, organic dispersion band of bead85of peripheral green space and protection of historicalction tion, formed has perfect modern service capacity of big city. Construction of urban green space system, promoting the constrution efficiency; vigorously improved city environment, shaping city features, upgrade city quality, play city of service funcopera 100(轿车上采用自动变速器后，换档位置“N”字母代号表示空档位置。 ( A ) city to old city transformation and built district of perfect, through live and industry with to of reasonable layout optimizationing extension type extended and connotation type upgrade simultaneously of mode, in Metro construction of while is committed center" strategic vision of space frame. Yibin Center City development construction steer-term basis in a reasonable space to develop, perfect urban district along the Yangtze River in Yibin "Ribbon multi-he minjiang River area, Golden Sands area on a longrea, to the North, the East open places to expand, Jiang an eastward connection, Ping Shan, radiation to the West; the South Bank aading development of the city to the East along the Yangtze River. Shi Gu area, lingang new vision to expand, Naxi district tspace layout structure, as le-of vision Yibin formation in the Center surrounded by, organic dispersion band of bead86e system, promoting the construction of peripheral green space and protection of historicaln spacty quality, play city of service function, formed has perfect modern service capacity of big city. Construction of urban greestructure, improve city traffic operation efficiency; vigorously improved city environment, shaping city features, upgrade ci