考研英语756doc.docx

考研英语756doc.docx

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考研英语756doc

考研英语-756

（总分：

100.00，做题时间：

90分钟）

一、SectionⅠUseofEng（总题数：

1，分数：

10.00）

Inhis1979book,TheSinkingArk,biologistNormanMyersestimatedthat

（1）ofmorethan100human-causedextinctionsoccureachday,andthatonemillionspecies

（2）lostbythecentury'send.Yetthereislittleevidenceof（3）thatnumberofextinctions.Forexample,onlysevenspeciesonthe（4）specieslisthavebecomeextinct（5）thelistwascreatedin1973.

Bio-（6）isanimportantvalue,accordingtomanyscientists.Nevertheless,thesupposed（7）extinctionratesbandiedaboutareachievedbymultiplyingunknownsby（8）togetimponderables.

Manyestimates,forinstance,relyagreatdealona"species-area（9）",whichpredictsthattwiceasmanyspecieswillbefoundon100squaremiles（10）ontensquaremiles.Theproblemisthatspeciesarenotdistributed（11）,sowhichpartsofaforestaredestroyedmaybeasimportantas（12）.

（13）,saysArielLugo,directoroftheInternationalInstituteofTropicalForestry-inPuertoRico,"Biologistswhopredicthighextinctionrates（14）theresiliencyofnature."

Oneofthemaincausesofextinctionsis（15）AccordingtotheConsultativeGrouponInternationalAgriculturalResearch,whatdestroys（16）treesisnotcommerciallogging,but"poorfarmerswhohavenoother（17）forfeedingtheirfamiliesthanslashingaridbuntinga（18）offorest".

Incountriesthatpracticemodern（19）agriculture,forestsareinnodanger.In1920,U.S.forestscovered732millionacres.Todaytheycover737million.ForestsinEurope（20）from361millionto482millionacresbetween1950and1990.

（分数：

10.00）

 A.afigure

 B.atotal

 C.anamount

 D.anaverage

 A.wouldbe

 B.wouldhave

 C.willbe

 D.willhave

 A.anythinglike

 B.anywherefrom

 C.anywherenear

 D.anythingbut

 A.jeopardized

 B.threatened

 C.risked

 D.endangered

 A.though

 B.when

 C.since

 D.unless

 A.variety

 B.diversity

 C.polarization

 D.differentiation

 A.throng

 B.quantity

 C.cluster

 D.mass

 A.unsuitables

 B.improbables

 C.impropers

 D.inappropriates

 A.equation

 B.formula

 C.coordination

 D.correspondence

 A.when

 B.like

 C.though

 D.as

 A.orderly

 B.widespreadly

 C.randomly

 D.densely

 A.whichplace

 B.howmany

 C.whichtime

 D.howmuch

 A.Whatismore

 B.However

 C.Nonetheless

 D.Therefore

 A.undermine

 B.underestimate

 C.understate

 D.undercalculate

 A.deplantation

 B.reforestation

 C.deforestation

 D.replantation

 A.tropical

 B.territorial

 C.atmospheric

 D.environmental

 A.capacity

 B.occupation

 C.opportunity

 D.option

 A.stack

 B.patch

 C.field

 D.plot

 A.high-quality

 B.high-speed

 C.high-yield

 D.high-level

 A.expanded

 B.extended

 C.enhanced

 D.improved

二、SectionⅡReadingCo（总题数：

0，分数：

0.00）

三、PartA（总题数：

0，分数：

0.00）

四、Text1（总题数：

1，分数：

10.00）

Staringlonginglyintoyouremptyrefrigeratorat3a.m.isabouttobecomeawholelotcheaper.TheU.S.DepartmentofEnergyrecentlyreleasednewefficiencystandardsforrefrigeratorsandfreezersmanufacturedafterJuly1,2001.Tomeetthesestandards,nextgenerationrefrigeratorsmustuse30%lessenergy.

Manufacturerswillachievemostoftheenergysavingsthroughimprovementsinthecompressor—lower-viscosityoilandtighterbearings,forexample.Otherchangeswillincludethickerinsulation,moreefficientfans,andincreasedsurfaceareaofthecondenserandevaporatorcoils.Manufacturerswillalsostepupeffortstoincorporatesmartfeatures,suchassensorsthatdeterminewhendefrostingisneeded."Theseareevolutionary,notrevolutionary,changes,"saysLenSwatkowski,directorofengineeringfortheAssociationofHomeApplianceofManufacturersinChicago.

Theapplianceswillalsolikelyemployanewblowingagentforfoaminsulation.Thecurrentagent—ahydrochlorofluorocarbo—willbebannedasofJanuaryl,2003,becauseofitsozone-depletingproperties.Testsofapotentialreplacement—ahydrofluorocarbon—showthatitconveysheataboutaswellastheoldchemical,withlessharmtoEarth'sozonelayer.

Ifissuesconcerningefficiency,toxicity,andlarge-scaleavailabilitycanbeworkedout,manufacturerswilllikelyswitchtothenewblowingagentatthesametimetheyincorporatetheefficiencyimprovements.

Thebottomline:

Consumerswillreapenergysavingsofabout$20peryearforatypical20-cubicfootrefrigerator.Andalthoughthenewrefrigeratorswillcostapproximately$80more,consumerswillseesignificantsavingsoverarefrigerator'saverage19-yearlife.Thenewfridgeswillhavethesamefeaturesandusablespaceasconventionalunits

TheDOEhasnowturneditsattentiontoairconditioners,rangesandovens,clotheswashers,waterheaters,andfluorescentlightballasts.Withinafewyears,allwillbesubjecttonewenergystandards.

（分数：

10.00）

（1）.Thenewgenerationrefrigeratorswilluselessenergymainlybecauseof______.（分数：

2.00）

 A.thickerinsulationandmoreefficientfans

 B.betterdesignandlubricationofthecompressor

 C.sensorsthatstartdefrostingwhenneeded

 D.extrafeatureswhichareaddedtotheappliance

（2）.Anewblowingagentwillprobablybeemployedbecause______.（分数：

2.00）

 A.thisnewagentdoesnoharmtoearth

 B.foaminsulationisneeded

 C.thecurrentagentnolongerworks

 D.ozone-depletingpropertiesareneeded

（3）."Theseareevolutionary,notrevolutionarychanges"probablymeans______.（分数：

2.00）

 A.Suddenandabruptmeasureswillbetaken

 B.Thefeatureswillbeaddedgradually

 C.Arevolutionwillusuallystartslowly

 D.Therulesofevolutionwillalterstepbystep

（4）.Thenewgenerationrefrigeratorwill______.（分数：

2.00）

 A.havelongerworkinglife

 B.costnomorethan$80

 C.havelessstoragespace

 D.save$20fromenergyyearly

（5）.Throughthispassage,theauthorintendsto______.（分数：

2.00）

 A.introducenewefficiencystandards

 B.explainimprovementsinthenewfridge

 C.calculatethepricesofthenewfridge

 D.promotesaleofthenewfridge

五、Text2（总题数：

1，分数：

10.00）

Youslipthekeyintotheignitionandcranktheenginetolife.Butbeforeyouputthecarintogear,youtapakeyonthekeyboardmountedbythesteeringwheel,andyourneweste-mailflashesuponthewindscreen.

Thisseductivesatyriswhatyougetwhenyoucrossacarandacomputer.Dubbedthe"networkvehicle",ornet-mobile,itmaysooncometoadrivewaynearyou（probablytheonebelongingtoyourrichneighbor）.Inanet-mobile,amotoristcouldtapintoaregionalroadsystembutalsotomapoutaroutearoundrush-hourtrafficsnags.Driversandpassengerswillbeabletosendandreceivee-mail,trackthelatestsportsscoresorstockquotes,surftheWeb,andevenplayvideogames.Orso,atleast,sayanumberofcomputer-industryfirmssuchasMicrosoft,Sun,IBMandNetscape.

Themoderncarisalreadyanelectronicshowcaseonwheels.On-boardmicrocomputersimprovefueleconomyandreduceemissions.Theyoperateanti-lockbrakesystems,andonsomecarsevenregulatethefirmnessoftheshockabsorbers.Butmuchofthetechnologyneededtoaddextraisavailablenow.Aprototypenetworkvehicle,producedbyaconsortiumofNetscape,Sun,IBMandDelco（anautomotive-electronicsfirmbasedinMichigan）,wasintroducedattherecentannualcomputer-industryshowinLasVegas.

Itnotonlyofferedsuchdesktop-computer-likeservicesase-mail,butallowedadrivertousethemwithoutlookingawayfromtheroad.Itwasoperatedbyvoicecommandsandprojecteditsdataontothewindscreen,usingthesamesortofhead-updisplaysystemfoundinmodernfighterjets.Membersoftheconsortiumthinkareal-worldnetworkvehiclecouldbeinproductioninaslittleasfouryears.

Carmakershavealreadybegunrollingoutsomeofthefeaturesfoundontheseprototypenet-mobiles.IfthedriverofaGeneralMotorscarequippedwithitsOn-Starsystemlockshiskeyinthecar,forexample,anemergencycentrecantransmitadigitalsignaltounlockthedoors.On-Staralsocallsautomaticallyforhelpifanaccidenttriggerstheairbags.ToyotaandGeneralMotorsareamongagrowinglistoffirmsofferingin-carnavigationsystems.AndinEurope,BMWandMercedes-Benzrecentlyintroducednavigationhardwarethatcannotonlyplotoutaroute,butalertadrivertotrafficjams.

（分数：

10.00）

（1）.Thefuturecarwillbeamachinewhich______.（分数：

2.00）

 A.sendsandreceivese-mails,andsurfstheWeb

 B.tapsintoaregionalroadsystemtogetdirections

 C.combinescarfunctionsandcomputerfunctions

 D.tracksthelatestsportsscoresandstockquotes

（2）."Anelectronicshowcaseonwheels"probablymeans______.（分数：

2.00）

 A.acomputerindustryshow

 B.anetworkcarexhibition

 C.acarthatexhibitelectronicachievements

 D.acomputerthathavewheels

（3）.Comparedwithanordinarymoderncar,thenetworkvehiclewillhaveanon-boardmicrocomputerwhich______.（分数：

2.00）

 A.projectsdataonthewindscreen

 B.improvesfueleconomyandreduceemissions

 C.operatesanti-lockbrakesystems

 D.regulatesthefirmnessoftheshockabsorbers

（4）.Thein-carnavigationsystemhasallofthefollowingfunctions,EXCEPT______.（分数：

2.00）

 A.callforhelpifanaccidenttriggerstheairbag

 B.transmitadigitalsignaltounlockthedoors

 C.alertemergencycentreifkeyislockedinthecar

 D.plotoutrouteandalertonetotrafficjams

（5）.Thepassageiswrittenprobablyto______.（分数：

2.00）

 A.promoteelectronicculture

 B.advertiseforthemotormanufacturers

 C.attractpotentialmotorconsumers

 D.provideinformationabouttbenetvehicle

六、Text3（总题数：

1，分数：

10.00）

ThebigUKgroceryretailerTESCOistestingadatabasewhichknowswhenyouliketoshop,what'sonthelistandhowmuchyouarelikelytospend.Italsoknowsthatthree-quartersofastore'stotalpro