2019上海金山区高三二模英语及答案

2019上海金山区高三二模英语及答案金山区2018学年第二学期质量监控高三英语试卷2019.04考生注意:1.考试时间120分钟，试卷满分140分。2.本考试设试卷和答 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 纸两部分。所有答题必须涂(选择题)或写(非选择题)在答题纸上,做在试卷上律不得分。3.答题前，务必在答题纸上填写准考证号和姓名，并将核对后的条形码贴在指定位置上,在答题纸反面清楚地填写姓名。I.ListeningComprehensionSectionADirections:InSectionA,youwillheartenshortconversationsbetweentwospeakers.Attheendofeachconversation,aquestionwillbeaskedaboutwhatwassaid.Theconversationsandthequestionswillbespokenonlyonce.Afteryouhearaconversationandthequestionaboutit,readthefourpossibleanswersonyourpaper,anddecidewhichoneisthebestanswertothequestionyouhaveheard.1.A.Atashop.                 B.Inacar.C.Inaplane.                 D.Onafarm.2.A.Customerandshopassistant.          B.Trainerandtrainee.C.Customerandtravelagent.           D.Sailorandtourist.3.A.S2.         B.$15.        C.$3.         D.$3.5.4.A.Atravelagency.               B.Salesstrategies.C.Ajobopportunity.              D.Tournews.5.A.Sheisverybusy.B.Shedislikesparties.C.Shehasaninvitationalready.D.Shequestionstheman'spurpose.6.A.Theclubmembersaren'tavailable.B.TheInternetdoesn'twork.C.Shedoesn'thavetimetodoit.D.Theemailhasn'tbeenready.7.A.Sheisgoingtomissherfirstclass.B.Sheprefersgoingtothedentistlaterintheday.C.Themanwillbebackbeforehisfirstclass.D.Themanmightsleeplateandmisshisappointment.8.A.Shecouldhelpthemanalot.B.She'sneverbeentothecity.C.Sheknowsthecityverywell.D.Shedoesn'tremembermuchaboutthecity.9.A.Hewassorryforthewoman'sabsence.B.Hewashappyaboutthewoman'sabsence.C.Hesuggestedthewomanbringherdaughter.D.Hesuggestedthewomanvisittheuniversity,10.A.Themanforgottogotothecinemawiththewoman.B.Bothofthespeakersenjoyedthefilm.C.Anexcitingfilmwillbeonnextweek.D.Thewomanwasinterestedinexploringspace.SectionBDirections:InSectionB,youwillheartwoshortpassagesandaloggerconversation,andyouwillbeaskedseveralquestionsoneachofthepassagesandtheconversation.Thepassagesandtheconversationwillbereadtwice,butthequestionswillbespokenonlyonce.Whenyouhearaquestion,readthefourpossibleanswersonyourpaperanddecidewhichoneisthebestanswertothequestionyouhaveheard.Questions11through13arebasedonthefollowingpassage.11.A.Theirprojecthaslastedforayear.B..Theirprojectisapartoftheirresearch.C.TheywerebornandbredinNewYork.D.Theylikedtotalktostrangerswhenyoung.12.A.Ambitious.              B.Difficult.C.Creative.               D.Well-prepared.13.A.TwopsychologistsconductfieldresearchonNewYorkstreets.B.Twoyoungmenlistentopeopleandgivethemtheirsuggestions.C.Twopsychologistshelpsolvepeople'sproblemswithwhattheylearn.D.Twoyoungpeopleencouragepeopletotalktothem,believingitcanhelp.Questions14through16arebasedonthefollowingpassage.14.A.MarkZuckerbergandBillGatesaremiddlechildren.B.CompetitiveandflexiblepersonalitiesdecidetheirsuccessC.TheysharetheidealisticpersonalitiesandpursueperfectionD.Theirsensitivitytothesurroundingsleadstotheirachievement15.A.Scientists.               B.Chiefexecutiveofficials.C.Artists.                D.Classicalmusicplayers.16.A.Familysizeplaysapart.B.Birthorderaffectspersonality.C.Birthorderinfluencescareerpaths.D.Howpeopleachievetheirsuccess.Questions17through20arebasedonthefollowingconversation.17.A.Becauseoftheirdurability.B.Becausetheyaresymbolsofstatus.C.Becauseofthetrendinfashion.D.Becausetheylookquiteappealing.18.A.Themanwasthecreatorofjeans.B.Themanappliedforapatentforjeans.C.Levi'sledtothepopularityofjeans.D.Levi'sledtoafloodoffakeproducts.19.A.Theyaredurableandwasheasily.B.Theyappearonsexandviolenceads.C.Theywinthefavorofmanywomenliberalists.D.Theyareinfluencedbycowboystyleandrebelliousspirit.20.A.Theadvantagesofjeans.B.ThecultureofwesternAmerica.C.Thehistoryofjeans.D.Thechangeofjeans.II.GrammarandVocabularySectionADirections:Afterreadingthepassagebelow,fillintheblankstomakethepassagecoherentandgrammaticallycorrect.Fortheblankswithagivenword,fillineachblankwiththeproperformofthegivenword;fortheotherblanks,useonewordthatbestfitseachblank.TimetoLearnHowtoSortWhateverwedon'twant--nomatterwhetherit'seggshells,newspapers,sodacansoroldsocks--it's.allgarbage.Andgarbagegoestothegarbagebin.Thereseemstobe(21)________wrongwiththat.Butdoyoureallyknowhowtothrowawaygarbageproperly?China(22)________(promote)garbagesortingforoveradecade,butforthemajorityofthepublictheconcepthasn'tsunkin.ShenZhenissuedanewregulation.Itsaysresidentswillbefinedupto100yuanandorganizations1,000yuanfornotsortingrubbish(23)________specificgroups.It'sevidentthatthegovernmentisdeterminedtopushthisforward,"saidZhangNing,aprogramofficer(24)________(serve)inaBeijing-basedpublicwelfareorganization.ButI'mafraidtheregulationwillprovetobecounter-productivebecausegarbagesortinghasneverbeenachievedbymerelyimposingpunishments."Arecentsurveyfoundthat49.5percentoftherespondentssaidtheystilldon’tknowhowtosortgarbage,(25)________45.5percentjustcantbebotheredtodoit.Lotsofcitizens(26)________(confuse)aboutwhat'srecyclableandwhat'sgeneralwaste.Forexample,it'sscarcelyknownthattissueisnon-recyclablebecauseit'stoomoisture-proneandusuallytoopolluted(27)________(recycle)."saidZhang,arepresentative.AccordingtoZhang,70percentofgarbageisa(28)________(misplace)resource.Forinstance,atonofwastesteelcanberefinedinto0.9tonsofusablesteel,andatonofkitchenwasteisabletoproduce0.3tonsoforganicfertilizer.Butallofthisisbasedonthecondition(29)________thegarbageiscategorizedproperly.Andthebehaviorofhouseholds(30)________hesortingprocessinitiallystarts-isthekey.Garbagesortingisachaineffect.MisconductattheverybeginningwillmakeallthefollowingGarbagesortingisacomplexissueandtakespatience.Sonexttimewhenyouthrowawaywhatiscalledgarbagedoitintherightway.SectionBDirections:Completethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed.A.marginalB.personaC.slidingD.promiseE.countedF.gapsG.profitsH.distributedI.reliefJ.maturingK.leveling BadNewsforApple;GoodNewsforHumanityWhenApplecutitsrevenueestimate(收益预期)forthelastquarterof2018becauseofunexpectedlyslowsalesofiPhones,marketstrembled.Thecompany'sshareprice,whichhadbeen(31)________ormonths,fellbyafurther10%onJanuary3rd,thedayafterthenewscameout.Apple'ssuppliers"shareswerealsohit._Analystsassumethatthenumberofsmartphonessoldin2018willbeslightlylowerthanin2017,theindustry'sfirst.everannualdecline.Allthisisterriblenewsforinvestorswhohad(32)________oncontinuedgrowth.Butstepbackandlookatthebiggerpicture.Thatsmartphonesaleshavepeaked,andseemtobe(33)________offataround1.4billionunitsayear,isgoodnewsforhumanity.Theslowdownisactuallytheresultofmarketsaturation(U$l),whichhitsApplethehardestbecause,despitearelativelysmallmarketshare(13%ofsmartphoneusers),itcapturesalmostalloftheindustry’s(34)________.ButApple’spainishumanity’sgain.Thefactthatthebenefitsofthesemagicaldevicesarenowsowidely(35)________issomethingtobecelebrated.Nowmanyphonesareusedforlongerthanthreeyears,oftenashand-me-downs.Replacementcyclesarelengtheningasnewmodelsofferonly(36)________improvements.Soevenwithflatsales,thelonger(37)________betweenupgradesmeanpeoplewhoalreadyhavephonesbenefit.Forallbutthemostaddicteddevicefans,theslowingpaceofupgradescomesasawelcome(38)________.Doesthatmeaninnovationisslowing?No.Ascomputersbecomesmaller,stillmore(39)________andclosertopeople'sbodies,manytechniciansexpectthatwearabledevices,fromsmartwatchestoARheadsets,willbethenextbigthing.Evenso,findinganotherproductwiththescopeofthesmartphoneisatallorder.Thesmartphone.holdsits(40)________asthedevicethatwillmakecomputingandcommunicationsworldwide.Therecentslowingofsmartphonesalesisbadnewsfortheindustry,obviously.Butfortherestofhumanityitisawelcomesignthatatransformativetechnologyhasbecomealmostuniversal.III.ReadingComprehensionSectionADirections:ForeachblankinthefollowingpassagetherearefourwordsorphrasesmarkedA,B,CandD..Fillineachblankwiththewordorphrasethatbestfitsthecontext.Now,U.Ѕ.researchershaveidentifiedanewwaytotreatpeopleinfectedwithtuberculosis(肺结核)beforetheygetsick.Tuberculosisisoneoftheworld'smost(41)________healththreats.TheWorldHealthOrganizationsaystuberculosiskillsnearlytwomillionpeopleeachyear.Anothertwobillionare(42)________:theyareinfected,butdon'thavesymptomsofthedisease.Thoseathighestriskcantakemedicine,butVanderbiltUniversityresearcherTimothySterlingsaysnoteveryone(43)________withthetreatment,whichisadailydoseofisoniazid(异烟肼，抗结核药)forninemonths.Soalthoughthemedicationishighlyeffectiveifpeopletakealloftheirmedication,manypeopledonottakealltheirmedicationandthereforetheeffectivenessofthetreatmentplanis(44)________.Asa(n)(45)________,Sterlingandhiscolleagues(46)________іѕоnіаzіdwithanotherdrug,rifapentine(利福喷汀).Thecombinationwastakenweekly,notdaily,forjustthreemonths.Andtheresultsofthisstudyshowedthatthenewtreatmentplan---thethreemonthsofisoniazidandrifapentine---wasaseffectiveasthenine-monthisoniazidtreatmentplan.(47)________,theshort-course,three-monthtreatmentplanhadhighertreatmentcompletionratesandwasalsowell(48)________.Therewassomeotherdifference.Thetwo-drug,combinationtreatmentwasadministeredasdirectly(49)________therapy.Thatmeansthepatientstooktheirmedicineinthepresenceofahealthcareworker,toensurethattheyfollowedthetreatmentplan.Thiswasalargestudy,involving7,500participantsinNorthAmerica,Spain,andBrazil.Sterling(50)________thatmostofthepeopleinthisstudywereHIV-negative.Theresultsmightbe(51)________forHIV-positivepeople.ArecentstudyinSouthAfricaindicatedthatthecombinationtherapyworkswellinpeopleinfectedwithHIVaswellastuberculosis,butthestudywastoosmalltobe(52)________TimothySterling'sresearch,publishedinTheNewEnglandJournalofMedicine,hasbeen(53)________bytheU.S.CentersforDiseaseControlandPrevention,theCDC.Thegovernmenthealthagencyrecommendsthe12-doseweeklycombinationtreatmentasanequalalternativetothe270-dosedailytreatmentplanthathasbeenthe(54)________therapy.Butbecauseofpossible(55)________issues,theCDCstillrecommendsthedailytreatmentplanforHIV-positivepatientswhoaretakingantiretroviraldrugsorwomenwhoarepregnant.Alsobecauseofalack.ofdata,theCDCsayschildrenunderage12shouldstaywiththenine-monthdailytreatment.41.A.publicB.persistentC.predictableD.mild42.A.outofcontrolB.beyondexpectationC.withouthopeD.underthreat43.A.putupB.followthroughC.getalongD.comeup44.A.decreasedB.maximizedC.measuredD.enhanced45.A.supplementB.substituteC.promotionD.alternative46.A.mixedB.replacedC.associatedD.connected47.A.AsaresultB.InadditionC.InfactD.Forinstance48.A.imposedB.toleratedC.cultivatedD.infected49.A.isolatedB.implementedC.observedD.required50.A.arguesB.suggestsC.commandsD.warns51.A.inevitableB.negativeC.distinctD.indirect52.A.definiteB.desiredC.logicalD.detailed53.A.conductedB.provedC.demonstratedD.approved54.A.similarB.uniqueC.standardD.peculiar55.A.personalB.crucialC.ageD.safetySectionBDirections:Readthefollowingthreepassages.Eachpassageisfollowedbyseveralquestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.Choosetheonethatfitsbestaccordingtotheinformationgiveninthepassageyouhavejustread.(A)Ifapersonwholived200yearsagowastreatedforaseizure(癫痫)today,theywouldbesurprisedbythetreatment'sfreshness.That'sbecausedoctorsinthe1800swereinfluencedmorebyoriginalmedicalbeliefsthanscience.Ratherthanthinkingthebraincausedseizures,peopleinthe1800sstillthoughttheyweretheresultofstrangeforces.Theyassociatedseizureswiththeworkofevilspirits.Othersfeltthattheseizureshadacosmicorlunarcause.Theybelievedthatthecyclesofthemoonandstarscouldmakesomeonehaveaseizure.Duringaprocesstotreatapatientwhohasseizures,doctorswouldforcethepatienttoprayforthegraceoftheGod.Theythoughtifthepatientdidthis,thenthepatientwouldridthemselvesoftheevilspiritscausingtheseizures.Thearrivalofmodernpsychiatry(精神病学)ocurredduringthe1800s.Atthattimepeoplewhosufferedfromseizureswereplacedinpsychiatrichospitals.Theyweretreatedliketheyweremad.However,noneoftheout-of-datetreatmentsworked.Itwasn’tuntilthelate1850sthatthecausesofseizureswereunderstood.Weknowtodaythatthesecauses.arerelatedtothebrain.Misfiredsignalsfromthebraincauseajerkingrefer(反射)inthebody.Theseusuallyoccurwhensomeoneisverytired.Oncethecausesofseizureswereknown,definitivetreatmentsweredeveloped.Today,treatmentsrangefromtakingpillstohavingsurgery.Treatmentispersonalizedaccordingtothetypeofseizurethepatienthas.Eventoday,somepeopleareunsureaboutseizures.Theirmostcommonmistakeisthinkingthatapersonhavingaseizurewillswallowtheirtongue.Theyoftenpushsomeimplementroughlyintheperson'smouth.However,thisdoesn’thelp.Theimplementoftenblockstheairwayandpreventsthepersonfrombreathing.Yetmostofthepublicnolongerfearpeoplewhohaveseizures.Instead,theycannowhelpandcomfortapersoniftheyhaveaseizure.56.Whywouldsomeonefromthepastbesurprisedbytoday'streatmentsforseizures?A.Becausetheybelievedinscientifictreatmentforseizures.B.Becausetheybelievedseizureswerecausedbystrangeforcesinnature.C.Becausetheybelievedtherewouldbenocureforseizures.D.Becausetheybelievedpatientwouldtreatseizuresbyhimself.57.Duringthearrivalofmodernpsychiatry,howwerepeopletreatedinpsychiatrichospitals?A.TheywereforcedtoasktheGodformercy.B.Theyworkedfortheold-fashionedtreatment.C.Theywereconsideredsenseless.D.Theyweretreatedasevilspirits.58.Whichofthefollowingconditioncancauseaseizure?A.Rashesandotherskinproblems.B.Infectedwounds.C.Stomachdisorders.D.Braininjuries.59.What'sthebesttitleofthepassage?A.SymptomsOldandNewB.UniversalForcesorScienceC.SeizuresNowandThenD.TreatmentsEffectiveorNot(B)Howafewmembersoftheanimalkingdomhandlethetransitiontoadulthood?AfricanelephantsThesebeautifulbeastscomeclosetoimitateteenrebellion.Calvesspendadecadewiththeirmothersinfemale---dominatedgroups---andladiesstaytherebutadolescentboysleavemomfornoisycrewsofbros.Intheir20s,theyoftendownsizetosmallermalegroups.Orangutans(猩猩)Slowmetabolismallowstheseprimatestosurvivefoodshortagestimeswhenweathermakesripefruitscarce.Butenergyefficiencycomesatacost;growthandmaturationtaketime.Orangutanmamasnursetheiryounglongerthananyotherwildcreaturedoes.Oreas(逆载鲸)Killerwhalesjointheirmother'sfamilialgroupforlife.Thislasting-relationshipseemstoincreaseapup'schanceofsurvival;ifmomdies,ayoungmale(under30)isthreetimesmoreIikelytodiethanapeerwhosemotherisalive.Riskofdeathpost-mom-mortemrisesaskidsgetolder.HarpsealsAharpseal's“childhood”lastsjust12days.Apup'ssolepurposeduring.thatbriefperiodofcoddling(宠爱)istoconstantlynurse,gainingafifthofitsbirthweightinblubber(鲸脂)everyday.Onceit'sfat-theybecomegreaterfrom25to80pounds---itslidesofftheiceandtakesonthesea.WolfspidersEveryparentknowsthattiredtoddlerslovetohitchapiggybackride.Thewolfspiderstrapsallherbabies(40or50,onaverage)ontoherbackatonce,carryingthebrooduntiltheyarecapableoffullyfunctionalspider-hood.Butluckilysheonlyhastopullthemforafewdays.60.Accordingtothepassage,whichanimalstakethebiggestresponsibilityinraisingtheiryoung?A.Harpseals.              B.AfricanelephantsC.Oreas.                D.Wolfspiders.61.Whatcanwelearnfromthesentence“Butluckilysheonlyhastopullthemforafewdays?”A.Othergrownwolfspiderswillcometotakecareofthebabies.B.Thetoddlersaretooheavyforparentstohitchapiggybackride.C.Babyspidersareabletoliveontheirownafterashortperiodoftime.D.Babyspiderscanmakefulluseofspider-hoodbeforetheyleavetheirparents.62.Whowillbeinterestedinthispassage?A.Astudentwhoisdoingaprojectonanimalgrowth.B.Akidwhoiskeenonanimalwatching.C.Azoo-workerwhoisresponsibleforvisitorssafety.D.Adoctorwhospecializesinanimals'health.(C)Asadvancesinauto-technologyhaveplacedahugenumberofself-drivingmachinesonourroadsandsidewalks,asideproducthasmaterializedinrecentyears:robot-babysitting.InPhoenix,humanattendantswillremotelymonitorGoogle'supcomingWaymorobot-taxis,usingthecarscamerastoevaluateandadapttopassengerorroadchallenges.Statesafetyregulationstypicallyrequirethatauto-vehiclesbeaccompaniedatalltimesbyhumans.Theseprofessionalsjobtitlesrangefromrobothandlertosafetydriver,buttheyhaveessentiallythesameresponsibilities:monitoringrobotbehaviorforsafetyandperformance,andansweringquestionsaboutthetechnology.Broadlyspeaking,robot-babysittingjobsfallundertheumbrellaofcareersinautomation,whichincludemaintenance,engineering,andprogramming.However,someobserversnotethatcertainkindsofrobot-babysitting---thekindthatisboringanddoesn'trequiremucheducation--canmakeforthanklesswork.Thesafetydriverswhositinself-drivingcarshavedescribedtheirrolesas“exhaustinganddemanding,"andmanytoldmeabouttheconstantpressuretostayvigilantatalltimes.It'sincrediblyhardtositinachairandstareatacomputerwithoutdoinganythingforeighthours,"Ramseysaid.ButyoudonotneedaPh.D.todoit.InMarch2018,thefieldofrobotbabysittingtookabeatingwhenaself-drivingUberinTempe,Arizona,hita49-yearoldnamedElaineHerzberg.DashcamfootageshowedthatRafaelaVasquez,thecar'ssafetydriver,hadnotbeenlookingattheroadwhentheaccidentoccurred.InvestigatorsaredecidingifVasquezwillbechargedwithmurder.AccordingtotheMcKinseyGlobalInstitute,10millionto800millionjobsgloballycouldbelosttoautomationby2030.Inthelongterm,it'sinevitablethatrobot-babysitterswillgothewayofelevatoroperatorsandlamplighters.Butthey'llalsobirthnewrobotrelatedroles.Ahugenumberofjobswillbecreatedasauto-vehiclesareloosedintotheenvironment,"Ramseysaid.In2016,BoschstartedtrainingstudentsfromSchooleraftCollege,acommunitycollegeinMichigan,inauto-vehiclerepair:Toyotahastrainedstudentsinmaintenanceaswell.Wemightevenseeareturntolow-leveljobswherepeoplecomeandfuelthecarforyou,Ramseysaid.Untilwecanwirelesslycharge,someoneneedstorefuelthem.Thehardest-to-automateindustries,asithappens,arctheonesthatrequirelookingafterhumans:childcare,education,health-careaides.Robotbabysittersmightfeelliketheyhavegainedthejobofthefuture.Butinfact,realbabysittersmightbebetterpositioned.63.Robot-babysittingjobsdoNOTinclude________.A.answeringthequestionsaboutthetechnique.B.observingthecertainkindsoftherobot-babysitter.C.monitoringthepotentialproblemsoftheauto-vehicles.D.maintainingthevehicleswhichareoutoforder.64.Theunderlinedwordvigilantmostprobablymeans________.A.grateful      B.suspicious      C.fit        D.alert65.AccordingtoRamsey,whatwillhappenwhenauto-vehiclesarereleasedintothemarket?A.Alotofopportunitieswillbecreated. B.Alargenumberofpeoplewillbeoutofwork.C.Auto-vehicleswillbecomemuchcheaper.D.Manypeoplewillturntobuyingauto-cars.66.What'sthispassagemainlyabout?A.TheRiseandFallofRobotBabysitters.B.TheFutureofAuto-Vehicles.C.TheLifeandEmploymentoftheFuture.D.ThePositionofRobotBabysitters.SectionCDirections:Completethefollowingpassagebyusingthesentencesgivenbelow.Eachsentencecanbeusedonlyonce.Notethattherearetwomoresentencesthanyouneed.A.It'snotdifficulttotellthePolarisapartfromthepileofotherstarsintheuniverse.B.PeoplewhoarelostcanberelievedbygazingupatPolaris.C.Byknowingdirectionsandtheirlocation,sailorscouldeasilysteertheirships.D.TheycoulddestroyentirejourneysbyblockingtheviewofPolaris.E.It'scertainthatthePolarisispartofaconstellation(星座),whichisnotfarfromitF.Itisspecialbecauseitistheonlystarthatalwaysappearstobeinthesameplaceinthesky.TheNorthStarAmongthepileofstarsintheuniverse,thereareacouplethatareofgreatimportancetopeopleonEarth.Thesun,ofcourse,isoneofthem.TheotherisknownasPolaris,theNorthStar.(67)__________.Therefore,itisagreatcompass( 指南 验证指南下载验证指南下载验证指南下载星度指南下载审查指南PDF 针).WhenpeopleinthenorthernpartofEarthlooktowardPolaris,theycanbecertainthattheyarefacingnorth.ThepermanenceofPolarisinthenorthskyhashelpedcountlesspeoplefindtheirdestinations.Beforetheinventionofmodernnavigationtools,sailorsreliedonPolaris.Fromthetopoftheirships,sailorswouldlookforPolaristofigureouttheirplaceatsea.Theyfiguredouttheanglebetweenthestarandthehorizontodeterminetheirlatitude(EFQ).Aslongastheequationswerenotwrong,theresultswereveryreliable.PolarisalsoletsailorsdetermineNorth,South,East,andWest.(68)__________Tothosewhosailatnight,changeablestormsanddarkcloudsweremorethanannoyingthings.(69)__________:.It'spossibleforacaptaintomakeanaccidentalwrongturn.Theshipcouldbecomestrandedatsea,andthefrustratedcaptainwouldhavenowaytogettheshipbackontherightcourse.Thesailor'sfearswouldn'tberelieveduntilthecloudsclearedandPolariscamebackintoview.Eventoday,sailorssometimeschoosetosteerbyusingPolarisonclearnights.(70)__________.TheBigDipper,aconstellationthatiswellknowninastrology,appearstorevolvearoundPolaris.ThehandleoftheBigDipperalwayspointstotheNorthStar.Whenpeoplegetlost,it'