2019年6月大学英语六级考试A卷真题及答案-17页精选文档

2019年6月大学英语六级考试A卷真 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 及答案-17页精选文档2019年6月大学英语六级考试A卷真题及答案PartⅠ        Writing            (30minutes)注意：此部分试题在答题卡1上PartⅡ ReadingComprehension(SkimmingandScanning)(15minutes)Directions:Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1Forquestions1-7,choosethebestanswerfromthefourchoicesmarkedA),B),C)andD.Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.Whatwilltheworldbelikeinfiftyyears?Thisweeksometopscientists,includingNobelPrizewinners,gavetheirvisionofhowtheworldwilllookin2056,frongas-poweredcarstoextraordinaryhealthadvances,JohnInghamreportsonwhattheworld’sfinestmindsbelieveourfutureswillbe.Forthoseofusluckyenoughtolivethatlong,2056willbeaworldofalmostperpetualyouth,whereobesityisaremotememoryandrobotsbecomeourcompanions.Wewillberubbingshoulderswithaliensandcolonizingouterspace.Betterstill,ourdescendantsmightatlastliveinaworldatpeacewithitself.Thepredictionisthatwewillhavefoundasourceofinexbaustible,safe,greenenergy,andthatsciencewillhavekilledoffreligion.Iftheyarerightwewillhaveremovedtwoofthemaincausesofwar-ourdependenceonoilandreligiousprejudice.Willwereally,astoday’sscientistsclaim,beabletoliveforeveroratleastcheattheageingprocesssothattheaveragepersonlivesto150?Ofcourse,allthesepredictionscomewithascientifichealthwarning.HarvardprofessorStevenPinkersays:“Thisisaninvitationtolookfoolish,aswiththepredictionsofdomedcitiesandnuclear-poweredvacuumcleanersthatweremade50yearago.”LivinglongerAnthonyAtala,directoroftheWakeForestInstituteinNorthCarolina,belivesfailingorganswillberepairedbyinjectingcellsintothebody.Theywillnaturallytostraighttotheinjuryandhelphealit.Asystemofinjectionswithoutneedlescouldalsoslowtheageingprocessbyusingthesameprocessto“tune”cells.BruceLahn,professorofhumangeneticsattheUniversityofChicago,anticipatestheabilitytoproduce“unlimitedsupplies”oftransplantablehumanorganswithouttheneededaneworgan,suchaskidney,thesurgeonwouldcontactacommercialorganproducer,givehimthepatient’simmuno-logicalprofileandwouldthenbesentakidneywiththecorrecttissuetype.Theseorganswouldbeentirelycomposedofhumancells,grownbyintroducingthemintoanimalhosts,andalloweingthemtodeveoopintoandorganinplaceoftheanimal’sown.ButProf.Lahnbelievesthatfarmedbrainswouldbe“offlimits”.Hesays:“Veryfewpeoplewouldwanttohavetheirbrainsreplacedbysomeoneelse’sandweprobablydon’twanttoputahumanbrainingananimalbody.”RichardMiller,aprofessorattheUniversityofMichigan,thinksscientistcoulddevelop“anthenticanti-ageingdrugs”byworkingouthowcellsinlargeranimalssuchaswhalesandhumanresistmanyformsofinjuries.Hesays:“It’sisnowroutine,inlaboratorymammals,toextendlifespanbyabout40%.Turningonthesameprotectivesystemsinpeopleshould,by2056,createthefirstclassof100-year-oldswhoareasvigorousandproductiveastoday’speopleintheir60s”AliensConlinPillinger,professorofplanerarysciencesattheOpenUniversity,says:”IfancythatatleastwewillbeabletoshowthatlifedidistarttoevolveonMarswellasEarth.”Within50yearshehopesscientistswillprovethatalienlifecamehereinMartianmeteorites(陨石).ChrisMcKay,aplanetaryscientistatNASA’sAmesResearchCenter.believesthatin50yearswemayfindevidenceofalienlifeinancientpermanentforstofMarsoronotherplaners.Headds:”ThereisevenachancewewillfindalienlifeformshereonEarth.ItmightbeasdifferentasEnglishistoChinese.PricetonprofessorFreemanDysonthinksit“likely”thatlifeformouterspacewillbediscovereddefore2056becausethetoolsforfindingit,suchasopticalandradiodetectionanddataprocessing,areimproving.