CET4大学英语四级考试全真预测第四套.docx

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1、CET4大学英语四级考试全真预测第四套Hi,各位考生大学英语四级考试即将来临，经过一个阶段的备考，你们是否信心满满，胸有成竹；在这里我们网站给大家提供了10全真预测试题，如果你可以在60分钟内完成这些试题，并且准确率达到80%以上；相信顺利过关已不再是梦想；同时大部分练习题后面附有详细的答案详解；如果在做题过程中，发现错误，或者其他不解的地方；请留下您宝贵的意见或建议；我们非常愿意考虑您的所有提议；希望我们可以共同努力，共同进步；PartReadingComprehension(SkimmingandScanning)(15minutes)Directions:Inthispart,youwi

2、llhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,choosethebestanswerfromthefourchoicesmarkedA),B),C)andD).Forquestion8-10,completethesentenceswiththeinformationgiveninthepassage.AnimalsontheMoveItlookedlikeascenefromJawsbutwithoutthedramaticmusic.Ahugeshark

3、waslowlyswimmingthroughthewater,itstailswingingbackandforthlikethependulumofaclock.Suddenlysensitivenerveendingintheshark餾skinpickedupvibrationsofastrugglingfish.Thesharkwasimmediatelytransformedintoadeadly,efficientmachineofdeath.Withmusclestaut,thesharkknifedthroughthewateratarapidspeed.Inaflashth

4、esharkcaughtitsvictim,alargefish,initspowerfuljaws.Then,jerkingitsheadbackandforth,thesharktorehugechunksoffleshfromitsvictimandswallowedthem.Soontheactionwasover.MovingtoSurviveInpursuingitsprey,thesharkdemonstratedinadramaticwaytheimportantroleofmovement,orlocomotion,inanimals.Liketheshark,mostani

5、malsusemovementtofindfood.Theyalsouselocomotiontoescapeenemies,findamate,andexplorenewterritories.Themethodsoflocomotionincludecrawling,hopping,slithering,flying,swimming,orwalking.Humanshavetheaddedadvantageofusingtheirvariousinventionstomoveaboutinjustaboutanykindofenvironment.Automobiles,rockets,

6、andsubmarinestransporthumansfromdeepoceanstoasfarawayasthemoon.However,forotheranimalsmovementcameaboutnaturallythroughmillionsofyearsofevolution.Oneofthemostsuccessfulexamplesofanimallocomotionisthatoftheshark.Itsabilitytoquicklyzeroinonitspreyhasalwaysimpressedscientists.ButittookadetailedstudybyD

7、ukeUniversitymarinebiologistsS.A.Wainwright,F.Vosburgh,andJ.H.Hebranktofindouthowthesharksdidit.IntheirstudythescientistsobservedsharksswimminginatankatMarinelandinSaintAugustine,Fla.Moviesweretakenofthesharks’movementsandanalyzed.Studieswerealsomadeofsharkskinandmuscle.SkinIstheKeyThebiologis

8、tsdiscoveredthattheskinofthesharkisthekeytotheanimal’shighefficiencyinswimmingthroughthewater.Theskincontainsmanyfibersthatcrisscrossliketheinsideofabeltedradialtire.Tcollagenfibers.Thesefiberscaneitherstoreorreleaselargeamountsofenergydependingonwhetherthefibersarerelaxedortaut.Whenthefibersa

9、restretched,energyisstoredinthemthewayenergyisstoredinthestringofabowwhenpulledtight.Whentheenergyisreleased,thefibersbecomerelaxed.TheDukeUniversitybiologistshavefoundthatthegreateststretchingoccurswherethesharkbendsitsbodywhileswimming.Duringthebody’sbackandforthmotion,fibersalongtheoutsidep

10、artofthebendingbodystretchgreatly.Muchpotentialenergyisstoredinthefibers.Thisenergyisreleasedwhentheshark’sbodysnapsbacktheotherway.Asenergyisalternatelystoredandreleasedonbothsidesoftheanimal’sbody,thetailwhipsstronglybackandforth.Thiswhip-likeactionpropelstheanimalthroughthewaterlikeal

11、ivingbullet.SourceofEnergyWhatcausesthefiberstostoresomuchenergy?InfindingtheanswertheDukeUniversityscientistslearnedthattheshark餾similaritytoabeltedradialtiredoesn餿stopwiththeskin.Justasaradialtireisinflatedbypressure,so,too,istheareajustundertheshark餾collagenradials.Insteadofairpressure,however,th

12、epressureinthesharkmaybeduetotheforceofthebloodpressingonthecollagenfibers.Whenthesharkswimsslowly,thepressureonthefibersisrelativelylow.Thefibersaremorerelaxed,andthesharkisabletobenditsbodyatsharpangles.Theanimalswimsthiswaywhenlookingaroundforfoodorjustswimming.However,whenthesharkdetectsanimport

13、antfoodsource,somefantasticinvoluntarychangestakeplace.Thepressureinsidetheanimalmayincreaseby10times.Thispressurechangegreatlystretchesthefibers,enablingmuchenergytobestored.Thisenergyisthentransferredtothetail,andthesharkisoff.Therestofthestoryispredictable.DolphinHasSpeedRecordAnotherfastmarinean

14、imalisthedolphin.Thisseagoingmammalhasbeenclockedatspeedsof32kilometers(20miles)anhour.Biologistsstudyingthedolphinhavediscoveredthat,liketheshark,theanimal’sefficientlocomotioncanbetracedtoitsskin.Adolphin’sskinismadeupinsuchawaythatitoffersverylittleresistancetothewaterflowingoverit.No

15、rmallywhenafishorotherobjectmovesslowlythroughthewater,thewaterflowssmoothlypastthebody.Thissmoothflowisknownaslaminarflow.However,atfasterspeedsthewaterbecomesmoreturbulentalongthemovingfish.Thisturbulencemusesfrictionandslowsthefishdown.Inadolphintheskinissoflexiblethatitbendsandyieldstothewavines

16、softhewater.Thewaves,ineffect,becometuckedintotheskin’sfolds.Thisallowstherestofthewatertomovesmoothlybyinalaminarflow.Whereotheranimalswouldbeslowedbyturbulentwateratrapidspeeds,thedolphincanracethroughthewateratrecordbreakingspeeds.OtherAnimalsLessEfficientNotallanimalsmoveasefficientlyassha

17、rksanddolphins.Perhapsthegreatestloserinlocomotionefficiencyistheslug.Theslug,whichlookslikeasnailwithoutashell,laysdownaslimytrailoverwhichitcrawls.Itusessomuchenergyproducingtheslimymucusandcrawlingoveritthatamousetravelingthesamedistanceusesonlyonetwelfthasmuchenergy.Scientistssaythatbecauseofthe

18、slug’sinefficientuseofenergy,itslifestylemustberestricted.Thatis,theanimalsareforcedtoconfinethemselvestosmallareasforobtainingfoodandfindingproperlivingconditions.Havehumanseverbeenfacedwiththiskindofproblem?1Accordingtothepassage,asharkcanusemovementtodosomethingexcept_.A)tofindfoodB)toavoid

19、beingchasedbyitsenemiesC)tofindanewplacetoliveD)toshowitsbraveness查看原文2Examplesofautomobiles,rocketsandsubmarinesareusedtoshowthat_.A)humansarethemostcleverlivingcreaturesintheworldB)humaninventionsenableustotravelinalmostanykindofenvironmentC)humansareverysuccessfulininventingtransportationtoolsD)h

20、umanscan’tmovelikeotheranimalsinanycircumstances查看原文3Whatisthekeytotheshark’sswiftlocomotioninwater?A)Theskin.B)Thetail.C)Themuscle.D)Thejaw.查看原文4AccordingtotheDukeUniversityscientists,whendoesthesharkstretchitscollagenfiberstothegreatestextent?A)Whenmovingitstailrapidly.B)Whenfindingits

21、preys.C)Whenstayingwithoutanymovement.D)Whenbendingitsbodyinswimming.查看原文5Whyistheareajustundertheshark’scollagenfiberssimilartoabeltedradialtire?A)Becauseitisalsofullofbloodpressure.B)Becauseitisalsofilledofairpressure.C)Becauseitisalsoinflatedbypressure.D)Becauseitalsocanbeusedagainandagain.

22、查看原文6Alaminarflowisformedwhenafishswims_.A)slowlythroughthewaterB)rapidlythroughthewaterC)againstthecurrentD)atthefastestspeedinwater查看原文7Consumingtheequalamountofenergyasaslugdoes,amousecantravelaslongasit.A)onetwelfthtimes.B)thesame.C)12times.D)1.2times.查看原文8Asharkfindsitspreyby9Accordingtothepass

23、age,canbecomparedtothestringofabowforbothofthemstoreenergywhenstretched.10Whenthesharkdetectsanimportantfoodsource,takeplace11PartReadingComprehension(ReadinginDepth)(25minutes)SectionAQuestions47to56arebasedonthefollowingpassage.Inrecentyears,moreandmoreforeignersareinvolvedintheteachingprogramsoft

24、heUnitedStates.Boththeadvantagesandthedisadvantagesusingforeignfacultyinteachingpositionshavetobe,ofcourse.Itcanbesaidthattheforeignbackgroundthatmakesthefacultymemberfromabroadanassetalsoproblemsofadjustment,bothfortheuniversityandfortheindividual.Theforeignresearchscholarusuallyisolateshimselfinth

25、elaboratoryasameansofprotection;,whatheneedsistobefittedtoahighlyorganizeduniversitysystemquitedifferentfromathome.Heisfacedinhisdailyworkwithdifferencesinphilosophy,arrangementsofcoursesandmethodsofteaching.Boththevisitingprofessorandhisstudentsacommongroundineachother’scultures,someconceptof

26、whatisalreadyinthemindsofAmericanstudentsisfortheforeignprofessor.Whilehelpinghimtoadapthimselftohisnewenvironment,theuniversitymustalsocertainadjustmentsinordertotakefulladvantageofwhatthenewcomercan.Itisn’talwaysknownhowtomakecreativeuseofforeignfaculty,especiallyatsmallercolleges.Thisisthou

27、ghttobeawherefurtherstudyiscalledfor.Thefindingsofsuchastudywillbeofvaluetocollegesanduniversitieswithforeignfaculty.A)fieldB)possessC)consideredD)expressE)offerF)createG)requiredH)ofI)emergeJ)makeK)lackL)howeverM)scopeN)causeO)that12SectionBPassageOneQuestions57to61arebasedonthefollowingpassage.The

28、reisanewtypeofsmalladvertisementbecomingincreasinglycommoninnewspaperclassifiedcolumns.Itissometimesplacedamongsituationsvacant,althoughitdoesnotofferanyoneajob,andsometimesitappearsamongsituationswanted,althoughitisnotplacedbysomeonelookingforajob,either.Whatitdoesistoofferhelpinapplyingforajob.Con

29、tactusbeforewritingyourapplication,orMakeuseofourlongexperienceinpreparingyourcurriculumvitaeorjobhistory,ishowitisusuallyexpressed.Thegrowthandapparentsuccessofsuchaspecializedserviceis,ofcourse,areflectiononthecurrenthighlevelsofunemployment.Itisalsoanindicationofthegrowingimportanceofthecurriculu

30、mvitae(orjobhistory),withthesuggestionthatitmaynowqualifyasanartforminitsownright.Therewasatimewhenjobseekerssimplywrotelettersofapplication.Justputdownyourname,address,ageandwhetheryouhavepassedanyexams,wasabouttheaveragelevelofadviceofferedtoyoungpeopleapplyingfortheirfirstjobswhenIleftschool.Thel

31、etterwasreallyjustforopeners,itwasexplained,everythingelsecouldandshouldbesavedfortheinterview.Andinthosedaysoffullemploymentthetechniqueworked.Theletterprovedthatyoucouldwriteandwereavailableforwork.Youreagerfaceandintelligentrepliesdidtherest.Later,asyoumoveduptheladder,somethingslightlymoresophis

32、ticatedwascalledfor.Theadvicethenwastoputsomethingintheletterwhichwoulddistinguishyoufromtherest.Itmightbetheaggressiveapproach.Yoursearchisover.Iamthepersonyouarelookingfor,wasawidelyusedtrickthatoccasionallysucceeded.Oritmightbesomespecialfeaturespeciallydesignedforthejobinterview.Thereisnodoubt,h

33、owever,thatitisincreasingnumberofapplicantswithuniversityeducationatallpointsintheprocessofengagingstaffthathasledtothegreaterimportanceofthecurriculumvitae.12.Thenewtypeofadvertisementwhichisappearinginnewspapercolumns_.A)informsjobhuntersoftheopportunitiesavailableB)promisestoofferusefuladvicetoth

34、oselookingforemploymentC)dividesavailablejobsintovarioustypesD)informsemployersofthepeopleavailableforwork13Nowadaysademandforthisspecializedtypeofservicehasbeencreatedbecause_.A)thereisalackofjobsavailableforartisticpeopleB)therearesomanytopeveljobsavailableC)therearesomanypeopleoutofworkD)thejobhi

35、storyisconsideredtobeaworkofart14Inthepastitwasexpectedthatfirstjobhunterswould.A)writeaninitiallettergivingtheirlifehistoryB)passsomeexamsbeforeapplyingforajobC)havenoqualificationsotherthanbeingabletoreadandwriteD)keepanydetailedinformationuntiltheyobtainedaninterview15Later,asonewentontoapplyform

36、oreimportantjobs,onewasadvisedtoincludeintheletter_.A)somethingthatwoulddistinguishonefromotherapplicantsB)hintedinformationaboutthepersonalityoftheapplicantC)one’sadvantagesoverothersinapplyingforthejobD)anoccasionaltrickwiththeaggressiveapproach16Thecurriculumvitaehasbecomesuchanimportantdoc

37、umentbecause_.A)therehasbeenanincreaseinthenumberofjobsadvertisedB)therehasbeenanincreaseinthenumberofapplicantswithdegreesC)jobsarebecomingmuchmorecomplicatednowadaysD)theotherprocessesofapplyingforjobsaremorecomplicated17PassageTwoQuestions62to66arebasedonthefollowingpassage.Incitieswithrentcontro

38、l,thecitygovernmentsetsthemaximumrentthatalandlordcanchargeforanapartment.Supportersofrentcontrolarguethatitprotectspeoplewhoarelivinginapartments.Theirrentcannotincrease;therefore,theyarenotindangeroflosingtheirhomes.However,thecriticssaythatafteralongtime,rentcontrolmayhavenegativeeffects.Landlord

39、sknowthattheycannotincreasetheirprofits.Therefore,theyinvestinotherbusinesseswheretheycanincreasetheirprofits.Theydonotinvestinnewbuildingswhichwouldalsoberentcontrolled.Asaresult,newapartmentsarenotbuilt.Manypeoplewhoneedapartmentscannotfindany.Accordingtothecritics,theendresultofrentcontrolisashor

40、tageofapartmentsinthecity.Sometheoristsarguethattheminimumwagelawcancauseproblemsinthesameway.Thefederalgovernmentsetstheminimumthatanemployermustpayworkers.Theminimumhelpspeoplewhogenerallylookforunskilled,lowayingjobs.However,iftheminimumishigh,employersmayhirefewerworkers.Theywillreplaceworkerswi

41、thmachinery.Theprice,whichisthewagethatemployersmustpay,increases.Therefore,otherthingsbeingequal,thenumberofworkersthatemployerswantdecreases.Thus,criticsclaim,anincreaseintheminimumwagemaycauseunemployment.Somepoorpeoplemayfindthemselveswithoutjobsinsteadofwithjobsattheminimumwage.Supportersofthem

42、inimumwagesaythatithelpspeoplekeeptheirdignity.Becauseofthelaw,workerscannotselltheirservicesforlessthantheminimum.Furthermore,employerscannotforceworkerstoacceptjobsatunfairwages.Economictheorypredictstheresultsofeconomicdecisionssuchasdecisionsaboutfarmproduction,rentcontrol,andtheminimumwage.Thep

43、redictionsmaybecorrectonlyifotherthingsareequal.Economistsdonotagreeonsomeofthepredictions.Theyalsodonotagreeonthevalueofdifferentdecisions.Someeconomistssupportaparticulardecisionwhileotherscriticizeit.Economistsdoagree,however,thattherearenosimpleanswerstoeconomicquestions.17.Thereisthepossibility

44、thatsettingmaximumrentmay_.A)causeashortageofapartmentsB)worrythosewhorentapartmentsashomesC)increasetheprofitsoflandlordsD)encouragelandlordstoinvestinbuildingapartments18Accordingtothecritics,rentcontrol_.A)willalwaysbenefitthosewhorentapartmentsB)isunnecessaryC)willbringnegativeeffectsinthelongru

45、nD)isnecessaryunderallcircumstances19Theproblemofunemploymentwillarise_.A)iftheminimumwageissettoohighB)iftheminimumwageissettoolowC)iftheworkersareunskilledD)ifthemaximumwageisset20Thepassagetellsus_.A)therelationshipbetweensupplyanddemandB)thepossibleresultsofgovernmentcontrolsC)thenecessityofgove

46、rnmentcontrolD)theurgencyofgettingridofgovernmentcontrols21WhichofthefollowingstatementsisNOTtrue?A)Theresultsofeconomicdecisionscannotalwaysbepredicted.B)Minimumwagecannotalwaysprotectemployees.C)Economictheorycanpredicttheresultsofeconomicdecisionsifotherfactorsarenotchanging.D)Economicdecisionssh

47、ouldnotbebasedoneconomictheory.22PartCloze(15minutes)Formanypeopletoday,readingisnolongerrelaxation.Tokeepuptheirworktheymustreadletters,reports,tradepublications,interofficecommunications,nottomentionnewspapersandmagazines:aneverendingfloodofwords.In_22_ajoboradvancinginone,theabilitytoreadandcompr

48、ehend_23_canmeanthedifferencebetweensuccessandfailure.Yfactisthatmostofusare_24_readers.Mostofusdeveloppoorreading_25_atanearlyage,andnevergetoverthem.Themaindeficiency_26_intheactualstuffoflanguageitselfwords.Takenindividually,wordshave_27_meaninguntiltheyarestrungtogetherintophrases,sentencesandparagraphs._28_,however,theuntrainedreaderdoesnotreadgroupsofwords.Helaboriouslyreadsonewordatatime,oftenregressingto_29_wordsorpassages.Regression,thetendencytolookbackover_30_youhavejustread,isacomm