大学英语六级-80-真题-无答案

大学英语六级-80(总分556.4,考试时间90分钟)PartⅠWriting1.1.现代社会中竞争无处不在；

2.竞争和合作的关系。PartⅡReadingComprehension(SkimmingandScanning)TimeintheAnimalMind

Humansareborntimetravelers.Wemaynotbeabletosendourbodiesintothepastorthefuture,atleastnotyet,butwecansendourminds.Wecanreliveeventsthathappenedlongagoorimagineourselvesinthefuture.Newstudiessuggestthatthetwodirectionsoftimetravelareintimatelytwistedtogetherinthehumanbrain.Butsomeexpertsonanimalbehaviordonotthinkweareuniqueinthisrespect.Theypointtoseveralrecentexperimentssuggestingthatanimalscanvisitthepastandfutureaswell.

Thefirstcluesaboutthetwistsandturnsofmentaltimetravelcamefrompeoplewithcertainbraininjuriesthatcausedthemtoforgetautobiographicaldetailswithoutforgettingtheinformationtheyhadpickedupalongtheway.AmanknownasK.C.,forinstance,couldplaychesswithnomemoryofhavingeverplayedit.K.C.couldremembersentencespsychologiststaughthimwithoutanymemoryofthelessons.K.C.hadlostwhatpsychologistsnowcallepisodicmemory.EndelTulving,aCanadianpsychologist,definedepisodicmemoryastheabilitytorecallthedetailsofpersonalexperiences:whathappened,whereithappened,whenithappenedandsoon.Dr.Tulvingarguedthatepisodicmemorywasdistinctfromotherkindsofmemorythatdidnotinvolvepersonalexperience.Peoplecanrememberhowtogettoasubwaystop,forexample,withoutrecallingthefirsttimetheywerethere.

Episodicmemorywasalsouniquetoourspecies,Dr.Tulvingmaintained.Foronething,hearguedthatepisodicmemoryrequiredself-awareness.Youcan'trememberyourselfifyoudon'tknowyouexist.Healsoarguedthattherewasnoevidenceanimalscouldrecollectexperiences,evenifthoseexperiencesleftanimpressiononthem.

ManyanimalbehaviorexpertsagreedwithDr.Tulving,eventhoughtheyhadnotactuallyrunexperimentstestingtheidea.ButwhenNicolaClayton,acomparativepsychologist,firstheardabouttheclaim,shehadadifferentreaction.Dr.Claytonbegantotestwesternscrubjays(灌丛鸦)toseeiftheymetanyofthecriteriaforepisodicmemory.Thejayscanhideseveralthousandpiecesoffoodeachyearandrememberthelocationofeachone.Dr.Claytonwonderedifscrubjayssimplyrememberedlocations,oriftheyrememberedtheexperienceofhidingthefood.

Sherananexperimentusingtwokindsoffood:mothlarvae(幼虫)andpeanuts.Scrubjayspreferlarvaetopeanutswhilethelarvaearestillfresh.Whenthelarvaearedeadforafewhours,thejayspreferpeanuts.Dr.Claytongavethebirdsachancetohidebothkindsoffoodandthenputtheminanothercage.Shelaterreturnedthebirdstotheirhiding-places,insomecasesafterfour,hoursandinothercasesafterfivedays.Thetimethescrubjaysspentawayfromtheircacheshadabigeffectonthetypeoffoodtheylookedfor.Thebirdsthatwaitedfourhourstendedtodiguplarvae,andthebirdsthathadtowaitforfivedayspassedthelarvaebyandduguppeanutsinstead.

In1998,Dr.Claytonandhercolleaguespublishedtheresultsoftheirexperiment,declaringthatscrubjaysmetthestandardsfor"episodic-like"memory.OtherscientistshavefollowedDr.Clayton'sleadandhavesearchedforsignsofepisodic-likememoryinetheranimals.Whenratsareexploringamaze,forexample,theyseemtobeabletorecallwhichkindsoffoodtheyencounteredalongtheway.Hummingbirds(蜂鸟)seemtorememberwhereandwhentheyvisitedindividualflowersfornectar.Rhesusmonkeys(恒河猴)canrememberwheretheyputfood,butnothowlongagotheyputitthere.

Someresearchershavenotbeenpersuadedbythesestudies,however."Animalsseemtobelivingverymuchinthepresent,"saidThomasSuddendorf,acomparativepsychologistattheUniversityofQueenslandinAustralia.Dr.Suddendorfarguesthatascrubjaycouldremembertypeoffoodalongwiththelocationofacachewithouthavingasenseormemoryofself."Informationisnotreallywhatcharacterizesmentaltimetravel."Dr.Suddendorfsaid."Iknowthatin1967inSwedenmymomgavebirthtomebutthatdoesn'tmeanIcantravelbacktothattimeandexperiencethatevent."

Episodicmemoryalsodependsonmanyotherfacultiesinthehumanmind,Dr.Suddendorfargues.Hesaidhebelievesitevolvedafterourancestorsbranchedofffromotherapes.Theadvantagelaynotinknowingthepast,however,butinproviding"anadvantageforpredictingthefuture,"hesaid.RecentbrainscanningstudiessupportDr.Suddendorf'slinkbetweenthepastandfuture.DanielSchacter,apsychologist,andhiscolleaguesatHarvardUniversityrecentlystudiedhowbrainsfunctionaspeoplethinkaboutpastexperiencesandimaginefutureones.Constructinganepisodicmemorycausesadistinctivenetworkofbrainregionstobecomeactive.Asapersonthenaddsdetailstothememory,thenetworkchanges,assomeregionsquietdownandothersfireup.Theresearchersthenhadtheirsubjectsthinkaboutthemselvesinthefuture.Manypartsoftheepisodicmemorynetworkbecameactiveagain.

Dr.Suddendorfarguesthattheseoverlappingnetworksformentaltimetravelevolvedatleast1.6millionyearsago.Hepointstostonetoolsprimitivesmadeatthattime.Paleoanthropologists(古人类学家)havedeterminedthatthetoolsweremovedmanymilesfromwheretheyweremade."Ifyou'vejusteaten,theonlyreasonyou'regoingtotakeatoolwithyouisifyouanticipateusingitinthefuture,"hesaid.

Dr.Suddendorfhas**parativepsychologiststoaction.Theyhavebeenlookingforevidencethatanimalscanalsoplanforthefuture."Wetestedsquirrelmonkeystoseeiftheycouldanticipatethefuture,andtooursurpriseitlooksliketheycould,"saidDr.WilliamRoberts,acomparativepsychologistattheUniversityofWesternOntario.Heandhiscolleaguesranatestinwhichtheyofferedsquirrelmonkeysachoicebetweenonepieceofdate(海枣)orfour.Notsurprisingly,themonkeystookfour.Butthescientiststhenbegantotakeawaywaterfromthemonkeysbeforetheyofferedthechoice.Ifthemonkeystookfourpieces,thescientistskeptthewaterawayforthreehours.Ifthemonkeystookone,thescientistsreturnedthewaterinhalfanhour.Themonkeyslearnedtochooseonedate.Eventhoughtheywerenotthirstyatthetime,theyanticipatedbecomingthirstyinthefuture.

Dr.Claytonrecentlytestedherscrubjaysforforesight.Sheandhercolleaguesputthebirdsinthree**partmentsforsixdays.Eachmorningthebirdswereshutfortwohoursinoneoftworooms.Inoneroomtheygotnothingtoeat.Intheotherroom,theygotpowderedpinenuts.Fortherestoftheday,eachbirdcouldmovearoundallthreeroomsandenjoymorepowderednuts.Ontheseventhday,thescientistsswitchedthepowderedpinenutswithrealones."IfI'mabird.whatIcoulddoistotakesomeoftheprovisionsandhideitsothatifIdowakeupthereinthemorning,Icangetmyownbreakfast,"Dr.Claytonsaid.Dr.Claytonfoundthatthebirdsputoverthreetimesmorepinenutsintheno-breakfastroomthaninthebreakfastroom.Shearguesthattheresultsmeanthatbirdscantakeactionfortheirfutureneeds,knowingwhatthey'llneedandwherethey'llneedit.

Otherexpertsonanimalbehaviorsaythatthestudyiscompelling.EvenDr.SuddendorfisintriguedbyDr.Clayton'sresults.Hesaidhewondershowlongthebirdscanplanahead."Cantheydothisforaneventnextweekornextmonthlikehumanscan?Isitlimitedtohiding,tojustfood?\2.K.C.couldrecallsomesentenceswithoutrememberinghehadtakensuchlessonsbecausehelearnedthembyhimself.3.Becausebeingawareofself-existenceisthepremiseofepisodicmemory,onlyhumanbeingshavesuchkindofmemory.4.Ifmothlarvaearedeadforfivedays,scrubjayswillnottouchupontheminanycase.5.SomescientistsagreedwithClayton'sclaimandfoundmoreevidencestosupportit.6.AccordingtoThomasSuddendorf,knowingsomeeventshappenedinthepastdoesn't______episodicmemory.7.Theadvantageofhavingepisodicmemoryliesinthatitcan______.8.Theexamplethatprimitivepeoplecarriedstonetoolswiththemindicateshumanepisodicmemory______.9.InordertoargueagainstDr.Suddendorf,**parativepsychologistshavebeenconductingexperimentstoproveanimalscan______.10.InWilliamRoberts'experiment,monkeyslearnedtotakeonedatebecausetheyforesawtheywouldbe______inthefuture.11.TheresultofClayton'srecenttestthatbirdshidmorepinenutsinthenon-**partmentindicatestheyhave______.PartⅢListeningComprehensionSectionA【点此下载音频文件】12.A.She'llhavetoenrollherselfagain.

B.Shemaypayforthefeeslater.

C.She'llhavetopaymore.

D.She'llhavenoplacetolive.13.A.Foodintherestaurants.

B.Foodbroughtfromhome.

C.Foodinthedinninghall.

D.Foodcookedbyherself.14.A.Theothermajorsdon-tprovideanytuitionscholarship.

B.Theacademicadvisoroffersherthisadvice.

C.Sheisinterestedinworkingwithnature.

D.Hermotherprefersthismajor.15.A.Togetanotherdegreetoearnmoremoney.

B.Tolearnmoreknowledgethantheothers.

C.Tobemoreindependent.

D.Tobecomeaconsultant.【点此下载音频文件】16.A.Findoutifarock-climbingcoursewillbeoffered.

B.Planarock-climbingtripoverspringbreak.

C.Convincethemantotakearock-climbingcoursewithher.

D.Findaplacetogorockclimbing.17.A.Thecollegedoesn'thaveanyrock-climbingequipment.

B.Therearenoappropriateplacesforclimbingnearby.

C.Thereisnoonetoteachthemhowtodoit.

D.Notverymanystudentsareinterestedinit.18.A.Climbershavetheopportunitytobeoutsideandenjoythescenery.

B.Climbingisn'tasexpensiveasothersports.

C.Learningtoclimbdoesn'ttakeaverylongtime.

D.Climbersdevelopskillsusefulinotheractivities.19.A.Increasingupperbodystrength.

B.Discussingpopularclimbingsites.

C.Selectingthenecessaryequipment.

D.Findingaclimbingpartner.【点此下载音频文件】20.A.Shehasfinishedherwork.

B.Sheistooexhaustedtowork.

C.Herkidswillarrivehomeafterschool.

D.Themandoesnotaskhertogobacktotheoffice.21.A.Itisweird.

B.Itisconvenient.

C.Itiscomfortable.

D.Itisexhausting.22.A.Thewomandoesnotlikeit.

B.Itisproducedbyweirdpeople.

C.Onecanseealotofstrangethingsinit.

D.Themanisdeterminedtowatchittonight.23.A.Hisbossmightaskhimtostayuplate.

B.Thewomanwillrecordtonight'sprogram.

C.Hemayhavetopreparefortomorrow'sbusinesstrip.

D.Hewillbehavingameetingwithhisbossatthattime.【点此下载音频文件】24.A.Neutral.B.Cautious.C.Favorable.D.Negative.25.A.Itgivesussufficientinformation.

B.Itgivesmisleadinginformation.

C.Itletsusknowthebestproduct.

D.Itfailstoconvincepeople.26.A.Advertisers.B.Manufacturers.C.Customers.D.Sellers.SectionB【点此下载音频文件】27.A.Theydonotknowanysolution.

B.Theydonotgiveupdrunkdriving.

C.Theydonotbehaveinpublicplaces.

D.Theydonotadmitbeingalcoholaddicts.28.A.Tostopthemfromfightingback.

B.Tothankthemfortheirhospitality.

C.ToteachthemtheEuropeanlifestyle.

D.Torelievetheirpainsandsufferings.29.A.Withoutinterventiontheywillbeaheadachetothenation.

B.Withsupporttheycanbebroughtbacktoanormallife.

C.Theyreadilyrespondtomedicaltreatment.

D.Theyposeaseriousthreattosocialstability.PassageThreeQuestions33to35arebasedonthepassageyouhavejustheard.【点此下载音频文件】30.A．10points.

B．2points.

C．15points.

D．5points.31.A．Anessay,

B．Amagazinearticle

C．Apoem.

D．Ashortstory.32.A．Theywilltakeoneofthesixmajortests.

B．Theywillbegivenapoptest.

C．Theywillberequiredtoreadashortstoryinclass.

D．Theywillhavetowriteacomposition.PassageOne【点此下载音频文件】33.A．Eliminatingtheoriginalvegetationfromthebuildingsite.

B．Markingthehousesinanareasimilartooneanother.

C．Decidingwhereahousewillbebuilt.

D．Surroundingabuildingwithwildflowersandplants.34.A．Theyarechangedtomakethesitemoreinteresting.

B．Theyareexpandedtolimittheamountofconstruction.

C．Theyareintegratedintothedesignofthebuilding.

D．Theyareremovedforconstruction.35.A．BecausemanyarchitectsstudiedwithWright.

B．BecauseWrightstartedthepracticeof"land-scraping".

C．BecauseWrightusedelementsofenvelopebuilding.

D．BecausemostofthehousesWrightbuiltweremadeofstone.PassageTwo【点此下载音频文件】36.A.Makeeveryoneworkforyou.

B.Geteveryonetohelpyou.

C.Letpeopleknowyouhavethefinalsay.D.Keepgivingorderstoeveryone.37.A.Gleasonthoughthiswonderfulideawasacceptedbythedirector.

B.Gleasonsucceededinhittinguponawonderfulidea.

C.Gleasonwasconfidentabouthisworkthenextday.

D.Gleasonappreciatedthedirector'swayofdirectingfilms.38.A.DirectingaFilm

B.TheKeytoSuccess

C.AWonderfulExperience

D.WorkingwithFilmStarsSectionCAmongstthemostpopularbooksbeingwrittentodayarethosewhichareusually

(36)

assciencefiction.Hundredsof

(37)

ampublishedeveryyearandarereadbyallkindsofpeople.

(38)

,someofthemostsuccessfulfilmsofrecentyearshavebeenbasedonsciencefictionstories.

Itisoftenthoughtthatsciencefictionisfairlynewdevelopmentin

(39)

,butits

(40)

canbefoundinbookswrittenhundredsofyearsago.Thesebookswereoften

(41)

withthe

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ofmineformofidealsociety,a

(43)

whichisstilloftenfoundinmodernstories.

(44)

.BooksbywriterssuchasJulesVerneandH.G.Wells,tomentionjusttwowell-knownauthors,havebeentranslatedintomanylanguages.

Modernsciencefictionwritersdon'twriteaboutmenfromMarsorspaceadventurestories.Theyaremoreinterestedinpredictingtheresultsoftechnicaldevelopmentsonsocietyandthehumanmind,

(45)

.Becauseofthis,theirwritinghasobviouspoliticalundertones.

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Thosewhoamsufficientlyclear-sightedtoseethewayweaxegoing,however,mayprovideavaluablelessononhowtodealwiththeproblemswhichsocietywillinevitablyfaceasittriestomasteritsnewtechnology**etotermswithacontinuallychangingviewoftheworld.【点此下载音频文件】39.40.41.42.43.44.45.46.47.48.49.PartⅣReadingComprehension(ReadinginDepth)SectionAOnDecember25,2000,manypeopleacrossNorthAmericareceivedarareChristmastreatwhenthemoonpassedinfrontofthesunresultinginapartialsolareclipse.

Solareclipsesoccurwhenthemoon

(47)

betweentheearthandthesun,andthemoon'sshadowcoverspartoftheearth;andatotalsolareclipsetakesplacewhenthemoon'sshadowblocksoutthesun

(48)

.WhatmadethisparticularsolareclipseuniquewasthatthiseventhasoccurredonDecembertwenty-fifthonly30times

(49)

thepast5000years,thelasttimein1954.

Butpeoplemustbeexceptionally

(50)

whenattemptingtoviewasolareclipse.Withouttakingprecautionary

(51)

,onecanpermanentlydamagetheretinaoftheeye;however,thereareseveralsafemethodsof

(52)

thisheavenlymarvel.

First,youcanviewasolareclipsebyusingeclipsesafetyglassesforfilteringoutthesun's

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rays.Theyshouldbeusedwhenanypartofthesunisvisible.

Sunglassescanblockoutsomeofthesun'sultravioletrays,buttheresultscanbeverydeceptive.Theeye'snatural

(54)

tothisdarkenedstatewhenwearingsunglassesistomakethepupillarger,whichallowsinmorelightandcan

(55)

thedamagetoyoureye.

Youcanwatchaneclipsebyprojectingthesun's

(56)

onapieceofpapereitherbyusingatelescope,oreasieryet,bycreatingapinholeinapieceofpaperandviewingtheresultonanotherpieceofpaper,thuscalledapinholeprojector.

A.lively

[I]during

B.passes

[J]intensify

C.among

[K]measures

D.careful

[L]reaction

E.target

[M]investigating

F.entirely

[N]harmful

G.image

[O]poses

[H]witnessing50.51.52.53.54.55.56.57.58.59.SectionBPassageOneIf**petitiveadvantagedependsonworkforceskills,Americanfirmshaveaproblem.Human-resourcemanagementisnottraditionallyseenascentralto**petitivesurvivalofthefirmintheUnitedStates.Skillacquisitionisconsideredanindividualresponsibility.Laborissimplyanotherfactorofproductiontobehired--rentedatthelowestpossiblecost--mustasonebuysrawmaterialsorequipment.

Thelackofimportanceattachedtohuman-resourcemanagementcanbeseeninthecorporatepeckingorder.InanAmericanfirmthechieffinancialofficerisalmostalwayssecondincommand.Thepostofheadofhuman-resourcemanagementisusuallyaspecializedjob,oilattheedgeofthecorporatehierarchy.Theexecutivewhoholdsitisneverconsultedonmajorstrategicdecisionsandhasno.chancetomoveuptoChiefExecutiveOfficer.Bywayofcontrast,inJapantheheadofhuman-resourcemanagementiscentralusuallythesecondmostimportantexecutive,aftertheCEO,inthefirm'shierarchy.

WhileAmericanfirmsoftentalkaboutthevastamountsspentontrainingtheirworkforce,infact,theyinvestlessintheskillsoftheiremployeesthandoeitherJapaneseorGermanfirms.Themoneytheydoinvestisalsomorehighlyconcentratedonprofessionalandmanagerialemployees.Andthelimitedinvestments

thataremadeintrainingworkersarealsomuchmorenarrowlyfocusedonthespecificskillsnecessarytodothenextjobratherthanonthebasicbackgroundskillsthatmakeitpossibletoabsorbnewtechnologies.

Asaresult,problemsemergewhennewbreakthroughtechnologiesarrive.IfAmericanworkers,forexample,takemuchlongertolearnhowtooperatenewflexiblemanufacturingstationsthanworkersinGermany(astheydo),theeffectivecostofthosestationsislowerinGermanythanitisintheUnitedStates.Moretimeisrequiredbeforeequipmentisupandrunningatcapacity,andtheneedforextensiveretraininggeneratescostsandcreatesbottlenecksthatlimitthespeedwithwhichnewequipmentcanbeemployed.TheresultisaslowerpaceoftechnologicalchangeAndintheendtheskillsofthebottomhalfofthepopulationaffectthewagesofthetophalf.Ifthebottomhalfcan'teffectivelystafftheprocessesthathavetobeoperated,themanagementandprofessionaljobsthatgowiththeseprocesseswilldisappear.60.Whichofthefollowingappliestothehuman-resourcemanagementof**panies?

A.Theyhirepeoplewiththeleastpossiblemoneyregardlessoftheirskills.

B.Theyregardskillgainingastheiremployees'ownbusiness.

C.Theyprefertohireself-trainedworkers.

D.Theyonlyhireskilledworkersbecauseofkeen**petition.61.WhatisthepositionoftheexecutiveofhumanresourcemanagementinanAmericanfirm?

A.Heisoneofthemostimportantexecutivesofthefirm.

B.Hispostislikelytodisappearwhennewtechnologieshavebeenintroduced.

C.Hehasnosayinmakingimportantdecisionsofthefirm.

D.Heisdirectlyunderthechieffinancialexecutive.62.ThemoneymostAmericanfirmsputinworkforcetrainingmainlygoeson______.

A.technologicalandmanagerialstaff

B.workerswhowillrunnewequipment

C.workerswholackbasicbackgroundskills

D.topexecutives63.WhyisthereaslowpaceoftechnologicalchangeinAmericanfirms?

A.NewequipmentinAmericaismoreexpensive.

B.Americanfirmsdon'tpayenoughattentiontoon-the-jobtrainingoftheirwork-era.

C.Thedecision-makingprocessinAmericanfirmsmakesthemlessresponsivetotechnologicalchanges.

D.TheprofessionalstaffofAmericanfirmsarelesspaidandsolesscreative.64.Whatisthemainideaofthepassage?

A.Americanfirms'humanresourcemanagementstrategiesaffect**petitivecapacity.

B.Human-resourcemanagementisakeyfactorinafirm'ssurvival.

C.ThecostofWorktraininginAmericaishigherthanthatinJapanandGermany.

D.AmericanfirmsaredifferentfromJapaneseandGermanfirmsinhuman-resourcemanagement.PassageTwoAttheKyotoconferenceonglobalwarminginDecember1997,itbecameabundantlyclear**plexithasbecometoworkoutinternationalagreementsrelatingtotheenvironmentbecauseofeconomicconcernsuniquetoeachcountry.Itisnolongerenoughtotrytoforbidcertainactivitiesortoreduceemissionsofcertainsubstances.Theglobalchallengesoftheinterlinkbetweentheenvironmentanddevelopmentincreasinglybringustothecoreoftheeconomiclifeofstates.Duringthelate1980swewereable,throughinternationalagreements,tomakedeepcutsinemissionsharmfultotheozonelayer.Thesereductionsweremadepossiblebecausesubstitutionshadbeenfoundformanyoftheharmfulchemicalsand,moreimportant,becausetheharmfulsubstancescouldbereplacedwithoutnegativeeffectsonemploymentandtheeconomiesofstates.

Althoughthethreatofglobalwarminghasbeenknowntotheworldfordecadesandallcountriesandleadersagreethatweneedtodealwiththeproblem,wealsoknowthattheeffectsofmeasures,especiallyharshmeasurestakeninsomecountries,wouldbenullified(无效的)ifothercountriesdonotcontroltheiremissions.WhereastheUNteamonclimatechangehasfoundthattheemissionsofcarbondioxidewouldhavetobecutgloballyby60%tostabilizethecontentofCO2intheatmosphere,thispathisnotfeasibleforseveralreasons.Suchdeepcutswouldcauseabreakdownoftheworldeconomy.Importantandpopulouslow-incomeormedium-incomecountriesarenotyetwillingtoundertake**mitmentsabouttheirenergyuses.Inaddition,thestateofworldtechnologywouldnotyetpermitustomakesuchabigleap.

Wemust,however,findasolutiontothethreatofglobalwarmingearlyinthe21stcentury.Suchacommitmentwouldrequireadegreeofsharedvision**monresponsibilitiesnewtohumanity.Successliesintheforceofimaginations,inimaginingwhatwouldhappenifwefailtoact.Althoughmanylivingincoldregionswouldwelcometheglobal-warmingeffectofawarmersummer,fewwouldcheerthearrivalofthesubsequenttropicaldiseases,especiallywheretherehadbeennone.65.ItcanbeinferredthatsincetheKyotoconference,wefind______.

A.globalwarmingproblemiscloselyrelatedtoeconomydevelopment

B.globalwarminghasproducedvariouseconomyproblemsaroundtheworld

C.differentcountrieshavedifferentviewsontheeffectofglobalwarming

D.globalwarminghasgreatlyaffectedtheworldwideeconomydevelopment66.Thedifficultyinsolvingtheproblemofglobalwarmingliesinthefactthat______.

A.notallthecountriesarewillingtomakedeepcutsinemissions

B.theleadersofmanycountriesarereluctanttoreachanagreement

C.peopleinmanyareasdon'trealizetheseriousnessoftheproblem

D.worldtechnologyisnotabletosolvetheproblem67.Cuttingcarbondioxideemissionby60%will______.

A.bereachedwhenlow-incomecountriesagreetoreachanagreement

B.causeacollapseoftheworldeconomy

C.reduceinalargeamountthecontentofCO2intheatmosphere

D.helprealizeastabledworldeconomy68.Inordertosolvetheproblemofglobalwarming,allcountriesshould______.

A.replacealltheharmfulsubstances

B.makeprogressineconomydevelopment

C.shareideasand**monresponsibilities

D.developadvancedtechnologytoimprovethesituation69.Itcanbeinferredthattheauthorofthepassage______.

A.argueagainstmakingdeepcutsinemissions

B.criticizesomecountriesinsolvingtheproblemofglobalwarming

C.evaluatetheenvironmentprotectionmeasuresofworldcountries

D.analyzetheproblemofglobalwarmingPartⅤClozeWorldWideWebisthepartoftheInternetthat

providessounds,pictures,andmovingimagesinadditiontotext.TheInternet

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computers**puternetworksaroundtheworld,buttheportionofthenetworknot

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theWorldWideWeb(oftencalledtheWeb,forshort)

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onlytextinformation.TheWeb,

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,hasmultimediacapabilities—includinggraphics,audio,andvideo.TheWebis

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electronicaddressescalledWebsites,whichcontainWebpagesthatholdthemultimediainformation.Websitesandtheirpages67incomputersconnectedtotheInternet.TimBernersLee,an**puterscientistattheEuropeanCenterforNuclearResearch(CERN)physicslaboratorynearGeneva,Switzerland,wrotetheWeb

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in1990.TheWebbecamepartoftheInternetin1991.TheintroductionoftheWebhelpedmaketheInternet

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