大学英语四级模拟试题9.docx

大学英语四级模拟试题9.docx

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大学英语四级模拟试题9

大学英语四级模拟试题（9）

Directions:

Therearefourreadingpassagesinthispart.Eachpassageisfollowedbysomequestions.ForeachquestiontherearefoursuggestedanswersmarkedA,B,CandD.YoushouldchoosetheonebestanswerandblackenthecorrespondingletterontheANSWERSHEETwithapencil.

Passage1

Howdoyousendamessagetoasubmergedsubmarine,particularlyonecarryingmiWatermaynotlooklikeabarriertocommunications,butappearancesaredeceiving.Waterstronglyabsorbsallelectromagneticwavesexceptbluegreenlightandextremelylowfrequencyradiowaves.Theverylowfrequencywavesnowusedtocontractsubmarinespenetratesonlyashortdistanceintotheocean,sothecraftmusteithersurfaceorsendupandantenna（天线）toreceivemessages,therebyincreasingitsweakness.Alasersystem---accurateoverlongdistancesandcapableofcarryingmoredatathantheverylowfrequencywaves---wouldtalktosubmarineattheirnormaldepths.

Inthesystem,averybroadbeamspreadingoutfreelyinalldirectionswouldbescanned（扫描）overthousandsofsquaremilesofoceansothatitwouldn'tendangerboats,birdsorfish——orthesubmarinesitissupposedtoreach.

Sinceonlyasmallfractionofthelasersystemwillmakeitswaythroughtheairandocean,receiversmountedonthesubmarinesmustbeablenotonlytodetectthelaserbutalsotodiscriminatebetweenitandsunlight.So,militaryscientistsarenowworkinghardonspecialfilterthatallowthroughonlytheprecisewavelengthsemittedbythelaser.Thefilteredlight,whentransformedintoelectricalsignal,canthenbedecoded.Militaryplannersareconfidentthatlasercommunicationwithsubmarinesisfeasible.

1.Whichofthefollowingdoesthepassagemainlydiscuss?

A.Missilescarriedbysubmergedsubmarines.

B.Messagessentbysubmergedsubmarines.

C.Blue-greenlasersusedbysubmergedsubmarines.

D.Thewaytosendamessagetosubmergedsubmarines.

2.WhichofthefollowingisTRUEaccordingtothepassage?

A.Waterisabarriertoradiocommunication.

B.Lasershavefoundwideapplicationinsubmarinecommunication.

C.Waterabsorbsallkindsofelectromagneticwaves.

D.Verylowfrequencyradiowavescannotbeusedtocontactsubmarines.

3.WhichofthefollowingisNOTtrueofalasersystem?

A.Itisabletomakeitswaythroughwater.

B.Itisabletocommunicatewithsubmarinesatwork.

C.Itsbeamreachesasubmergedsubmarinewiththehelpofanantenna.

D.Itisabletocarrymoredatathanlowfrequencywaves.

4.Thereferenceword“it”（Sentence1,para.3）refersto.

A.theair

B.thelaserbeam

C.theocean

D.thesubmarine

5.Whowouldbeverymuchinterestedinthepassage?

A.Missilebuilders

B.Militaryscientists

C.Fishermen

D.Shipbuilder

Passage2

TheWestbeguntotakemorenoticeoftheEast.Thefifthvolumeofanenormousworkre-assessingtheChinesecontributiontoscienceandtechnologyistobepublishednextyear.Thefirstvolume,whichwaspublishedtwentyyearsago,setthetoneforthewholework.Init,evidencewasgiventoshowthatmanyinventionswhich,untilthen,westernhistorianshadclaimedforEurope,weremadefirstinChina.Theattempttorewritetheintellectualhistoryoftheworldwasnotreceivedwithoutprotestbysomereputablehistorians.However,theevidencethathasbeenpresentedsofarinthefirstfourvolumeshaspersuadedmanyhistorianswhowereskepticalatfirst.China'sinventionofpaper,printing,themagneticcompassandgunpowderhasneverbeendisputed,butthisnewhistoryhasaddedadvancedbridgedesign,mechanicalclocks,paddleboatsandmanyotherinventionstothelist.

InthefourvolumespublishedsofarnoattempthasbeenmadetoexplainwhyChinahasnotkeptupwiththeWestinscienceandtechnologyinmoderntimes.ItisprobablethattheansweristobefoundinthesocialandeconomichistoryofChina,whereastaticsocietyunderarelativelybenevolentregimeofscholar-gentrycontrastswiththepotentiallyrevolutionaryanddynamicsocietyoftheWestattheendoftheMiddleAges.Inrecentyears,theChinesegovernmenthasbeenmakingeveryefforttocatchupwiththeWestagain,andthereislittledoubtthatthegapisbeingreducedyearbyyear.ButwillChinaavoidtheWest'smistakes?

6.Sofar,howmanyvolumeshavebeenpublished?

A.Five.

B.Four.

C.Three.

D.None.

7.Thefirstvolumewaspublished.

A.tenyearsago

B.lastyear

C.fiveyearsago

D.twentyyearsago

8.InLine7,theword“skeptical"means.

A.doubtful

B.worried

C.sad

D.angry

9.Whichofthefollowingisnotmentionedinthepassage?

A.Gunpowder.

B.Needle.

C.Paddleboats.

D.Bridgedesign.

10.Thebesttitleforthispassageis.

A.China'sInventions

B.ComparisonsBetweentheEastandtheWest

C.ChinaIsCatchingUp

D.SituationsinChina

Passage3

WithinfifteenyearsBritainandothernationsshouldbewellonwiththebuildingofhugeindustrialcomplexesfortherecyclingofwaste.Thewordrubbishcouldloseitsmeaningbecauseeverythingwhichgoesintothedustbinwouldbemadeintosomethinguseful.Eventhemostdangerousandunpleasantwasteswouldprovideenergyifnothingelse.

ThenewconceptofrecyclingwasteistakingshapeattheBritishtechnologicallaboratoryatWarrenSpring,notfarfromthenorthofLondon.Today,thelaboratoryspendsfourtimesasmuchmoneyinstudyingrecyclingasitdidfiveyearsago.

Thelatestprojectistotakeacityofaroundhalfamillioninhabitantsanddiscoverexactlywhatrawmaterialsgointoitandwhatgoout.Theaimistofindouthowmuchoftheserawmaterialscouldbeprovidedifaplantforrecyclingwastewerebuiltjustoutsidethecity.Thisplantwouldrecyclenotonlymetalsuchassteel,leadandcopper,butalsopaperandrubberaswell.Methodshavebeendiscovered,forexample,forremovingtheinkfromnewsprintsothatthepapercanbeusedagain,andforobtainingvaluableoilsandgasesfromoldmotorcartypes.Alltheseideasarealreadybeingmadeuseof,butwhatisnewistheideaofcombiningthemonsuchalargescaleinasingleplantdesignedtorecyclemosttypesofwaste.

Anothernewprojectisbeingsetuptodiscoverthebestwaysofsortingandseparatingtherubbish.Whenthisprojectiscomplete,therubbishwillbeprocessedlikethis:

first,itwillpassthroughsharpmetalspikeswhichwilltearopentheplasticbagsinwhichrubbishisusuallypacked;thenitwillpassthroughapowerfulfantoseparatethelightestelementsfromtheheavysolids;afterthatcrushersandrollerswillbreakupeverythingthatcanbebrokenfinally,andtherubbishwillpassundermagnets,whichwillremovethebitsofironandsteel;finelytherubberandplasticwillthenbesortedoutinthefinalstage.

Thefirstfull-scalegiantrecyclingplantsare,perhaps,fifteenyearsaway.Butinsomebigindustrialareas,whererubbishhasbeendumpedforsolongthattherearenoholeslefttofillupwithrubbish,thesenewautomaticrecyclingplantsmaybebuiltsooner.Indeed,withthegrowingcostoftransportingrubbishtomoredistantdumps,somebigcitieswillbeforcedtobuildtheirownrecyclingplantsbeforelong.

11.ProjectsforrecyclingwasteinBritain.

A.willnotbestartedforatleastfifteenyears

B.arebeingdevelopedalloverBritain

C.havenotyetbeenfullytested

D.havebeenabandonedbecausetheyaretooexpensive

12.Thepurposeofthelatestrecyclingprojectis

A.topreventpeoplefromputtingrubbishintoholes

B.tofindawayofdestroyingallkindsofwaste

C.toextractusefulrawmaterialsfromthewaste

D.tofindouthowmuchrawmaterialsshouldbeprovidedofpeoplewanttorecyclethewaste

13.Thenewtypeofrecyclingplantwill.

A.recycleonlypaperandrubber

B.notrecyclemetals,paperorrubber

C.recyclepaper,rubberandmetals

D.notrecyclesteel,leadorcopper

14.Thefirstrecyclingplants.

A.havealreadybeenbuiltinlargeindustrialareas

B.willnotbebuiltforatleastfifteenyears

C.willprobablybebuiltinthenextfifteenyears

D.willbetooexpensivetobuildnearbigcities.

15.“Wellonwith"inthefirstparagraphprobablymeans.

A.finishedwith

B.nearingcompletion

C.gettingreadytostart

D.makingimprovementson

Passage4

Peoplewithdisabilitiescomprisealargepartofthepopulation.Itisestimatedthatover35millionAmericanshavephysical,mental,orotherdisabilities.Abouthalfofthesedisabilitiesare“developmental",i.e.,theyoccurpriortotheindividual'stwenty-secondbirthday,oftenfromgeneticconditions,andaresevereenoughtoaffectthreeormoreareasofdevelopment,suchasmobility,communication,employment,etc.Mostotherdisabilitiesareconsidered“adventitious",i.e.,accidentalorcausedbyoutsideforces.

Priortothe20thcentury,onlyasmallpercentageofpeoplewithdisabilitiessurvivedforlong.Medicaltreatmentforthesedisabilitieswasunavailable.Advancementsinmedicineandsocialserviceshavecreatedaclimateinwhichpeoplewithdisabilitiescanexpecttohavesuchbasicneedsasfood,shelter,andmedicaltreatment.Unfortunately,thesebasicsareoftennotavailable.Civillibertiessuchastherighttovote,marry,getaneducation,andgainemploymenthavehistoricallybeendeniedonthebasisofdisability.

Inrecentdecades,thedisabilityrightsmovementhasbeenorganizedtofightagainsttheseinfringementsofcivilrights.Congressrespondedbypassingmajorlegislationrecognizingpeoplewithdisabilitiesasaprotectedclassundercivilrightss