2021-2022年山西省朔州市大學英語6級大學英語六級真題一卷(含答案)

2021-2022年山西省朔州市大學英語6級大學英語六級真題一卷(含答案)學校:________班級:________姓名:________考號:________

一、2.ReadingComprehension(SkimmingandScanning)(20題)1.

Inyear______,thereweremanydeadtubewormsfoundintheEastPacificRiseaccordingtotheinformationfromtheexpeditions.

2.WhatdidTimYoungsuggestdotoemployeesembarrassingco-workersbygivingtoomuchpersonalinformation?

A.Sackingthemonthespotfordoingso.

B.Forbiddingsensitivetopicsintheoffice.

C.Tryingtoredirecttheirattentiontowork.

D.Limitingtheirtimespentwithco-workers.

3.

Whatdoes“giveitago”inParagraph5mean?

A.Letitgo.B.Gooutside.C.Setupagoal.D.Haveatry.

4.

Thepassagetellsuswhybathsandmassagesbenefitusintermsofmood.

A.YB.NC.NG

5.

NASAfirstsentupsatellitestoenable______.

A.spacementocommunicatewitheachother

B.peopleonthegroundtosendandreceivemessages

C.peopleonthegroundtoknowabouttheouterspace

D.spacementosendpicturesbacktotheearth

6.

Whichofthefollowingtroublesisnotcausedbyidentitytheft?

A.Cleancredithistory.

B.Lossoffreedom.

C.Financialmess.

D.Alotofpaperwork.

7.

MarkTwainactuallymeans______.

8.

Ifagossipbringsgoodtothegossiping,thepeoleinvolvedarelikelytodevelop______.

9.

Ifyouwanttogiveupajobwholesale,youshouldevaluate______fromit.

10.

IfyouwanttogetmoreinformationaboutITEMONE,youcancallat714-824-781

A.YB.NC.NG

11.WhichkindofcompaniesdotheKellyServicescontactwith?

A.Bothmulti-nationalandsmalllocalcompanies.

B.Listedcompanies.

C.Smallerlocalcompanies.

D.Internationalenterprise.

12.America'sBrainDrainCrisis

LosingtheGlobalEdge

WilliamKurtzisaself-describedcomputergeek.Amoreaptdescriptionmightbecomputergenius.Whenhewasjust11,Kunzstartedwritingsoftwareprograms,andby14hehadcreatedhisownvideogame.AsahighschoolsophomoreinHouston,Texas,hewonfirstprizeinalocalsciencefairforadataencryption(編密碼)programhewrote.Inhissenioryear,hetooktopprizeinaninternationalscienceandengineeringfairfordesigningaprogramtoanalyzeandsortDNApatterns.

KunzwentontoattendCarnegieMellon,amongthenation'shighest-rankeduniversitiesincomputerscience.AftercollegehelandedajobwithOracleinSiliconValley,writingsoftwareusedbycompaniesaroundtheworld.

Kunzlookedsettobecomeastarinhisfield.Thenhegaveitallup.

Today,threeyearslater,KurtzisinhisfirstyearatHarvardBusinessSchool.Heleftsoftwareengineeringpartlybecausehisearningpotentialpalednexttofriendswhoweregoingintolaworbusiness.Healsoworriedaboutjobsecurity;especiallyasmorecompaniesmovetheirprogrammingoverseastolowercosts."Everytimeyou'reaskedtotrainsomeoneinIndia,youthink,'AmItrainingmyreplacement?'"Kunzsays.

Thingsareturningoutverydifferentlyforanotherstandoutinengineering,Qing-ShanJia.AstudentatTsinghuaUniversityinBeijing,Jiashinesevenamonghisgiftedcohorts(一群人)ataschoolsometimescalled"theMITofChina".HeconsideredapplyingtoHarvardforhisPhD,butdecideditwasn'tworthit.

Hisuniversityisinvestingheavilyincutting-edgeresearchfacilities,endattractsanimpressiverosterofinternationalprofessors."Icangetaworld-classeducationhereendstudywithworld-classscholars,"Jiasays,

Thesetwosnapshots(快照)illustratepartofadeeplydisturbingpicture.Inthedisciplinesunderpinningthehigh-techeconomy-math,scienceandengineering---Americaissteadilylosingitsglobaledge.Thedepthandbreadthoftheproblemisclear:

-SeveralofAmerica'skeyagenciesforscientificresearchanddevelopmentwillfacearetirementcrisiswithinthenexttenyears.

-Lessthan6%ofAmerica'shighschoolseniorsplantopursueengineeringdegrees,down36%fromadecadeago.

-In2000,56%ofChina'sundergraduatedegreeswereinthehardsciences;intheUnitedStates,thefigurewas17%.

-ChinawilllikelyproducesixtimesthenumberofengineersnextyearthanAmericawillgraduate,accordingtoMikeGibbonsoftheAmericanSocietyforEngineeringEducation.Japan,withhalfAmerica'spopulation,hasminted(鑄造)twiceasmanyinrecentyears.

"MostAmericansare'unawareofhowmuchsciencedoesforthiscountryendwhatwestandtoloseifwecan'tkeepup,"saysShirleyAnnJackson,presidentofRensselaerPolytechnicInstituteandchairoftheAmericanAssociationfortheAdvancementofScience.DavidBaltimore,presidentoftheCaliforniaInstituteofTechnologyandaNobellaureate,putsitbluntly:"Wecan'thopetokeepintactourstandardofliving,ournationalsecurity,ourwayoflife,ifAmericansaren'tcompetitiveinscience."

TheCrisisAmericansCreated

InJanuary2001,theHart-RudmanCommission,taskedwithfindingsolutionstoAmerica'smajornationalsecuritythreats,concludedthatthefailuresofAmerica'smathandscienceeducationandAmerica'ssystemofresearch"poseagreaterthreat...thananypotentialconventionalwar."

Therootsofthisfailurelieinprimaryandsecondaryeducation.Thenationthatproducedmostofthegreattechnologicaladvancesofthelastcenturynowscorespoorlyininternationalsciencetesting.A2003surveyofmathandscienceliteracyrankedAmerican15-year-old

A.YB.NC.NG

13.

Creativejusticeiswelcomedbythepublic.

A.YB.NC.NG

14.

Asleepingpersonandafaintedonearesimilarinthatbothcanbewakenbystrongstimulus.

A.YB.NC.NG

15.

Thereduced______isanadvantageattributedtoautomation.

16.

Athleticshoecompaniesusedthetechnologyofmoonbootsto______.

A.reducetheimpactonfeetandlegs

B.makeathleticshoesmuchlighter

C.improvethedurabilityofshoes

D.preventthegrowthofbacteria

17.

BeforeAndyHildebrandretired,heworkedfor______.

A.arecordfactory

B.theoilindustry

C.aconsultationcompany

D.theadvertisingindustry

18.

Becauseofdeforestation,wearelosingmanypreciousspeciestohumanbeings,whichmayeventuallyleadtoalossof______onalargescale.

19.

Accordingtothepassage,fearoftakingtestmaygiveriseto______.

20.

TheIndiansatfirstdidnotliketheMissionbecausetheyfeltthatitwasinfavorof______.

二、3.ListeningComprehension(20題)21.

【B8】

22.聽力原文：W:Hi,Jack.Tomorrow'sthebigday!YoumustbeexcitedaboutgoingtoFranceforyourfirstinternationalconference.

M:Thetrip,yes,butnotthepreparation.

W:Whatdoyouneedtodoexceptpack?

M:Youknowhowyoualwaysfeelsoawfulwheneveryoumakeabigchangeintimezones?ThistimeI'mtryingananti-jet-lagprogramsoI'llbealertevenforthefirstday'slectures.

W:Buthowcanyouavoidjetlag?Withthatlateflightandasix-hourdifferenceintime,it'sboundtotakeyouacoupleofdaystoadjust.

M:Wellthisprogram'ssupposedtogetyourbodytofeellikeit'sinthenewtimezonebeforeyouleave.Thetheoryisthatthefoodyoueatactuallytellsyourbodywhentobeactiveandwhentoberestful,sochangingyourdietcanhelpyoubereadyforthetimechange.Youhavetoalternatefeastingandfasting...youknowsometimeseatalot,sometimesjustalittle.

W:OK.NowIseewhyyou'renotenjoyingthepreparation.Ican'tquitepictureyoufasting!

M:Actuallytheworstisalreadyover.Twodaysbeforetheflight,you'resupposedtohaveonlylightmealsandlimityourselftoeighthundredcalories.

W:Thatmusthavebeentough.

M:Yeah,butI'mmakingupforittoday.Feastdayismuchbetter...thoughIstilldon'tgettoeatanysnacksafterdinner.

(23)

A.Newfoodstotrywhentraveling.

B.Makingreservationsforthebesttravel.

C.Avoidinggainingweightwhiletraveling.

D.Adjustingtotimechangeswhentraveling.

23.

【B7】

24.

【B4】

25.聽力原文：M:Manypeopleprefertakingpublicbusesorthesubwayoreventaxisbecauseparkingisgettingtobearealheadacheinsomepartsofthecity.

W:Thatdoesn'tsurpriseme.

Whatconclusioncanwedrawfromthisconversation?

(14)

A.Publicbusesarefastandcheap.

B.Parkingisbecomingabigproblem.

C.Subwaytrainsareevensaferthantaxis.

D.Taxisatemoreconvenientthanbuses.

26.(25)

A.Think.

B.Sitdown.

C.Talkwithhisclassmates.

D.Wanderaround.

27.聽力原文：W:Here'sthisweek'sschedule.OnMonday,there'stheboardmeeting.YourspeechattheLion'sClubonTuesday.Then,onWednesday,you'resupposedtoseethedentist.

M:I'mgladIdon'thavetotraveltothebusinessconferenceuntilnextweek.

Q:WhatwillthemandoonTuesday?

(19)

A.Hemustseethedentist.

B.Hemustgiveaspeech.

C.Hehasameetingtoattend.

D.Hemusttraveltoabusinessconference.

28.聽力原文：W:Hi,Jack.Tomorrow'sthebigday!YoumustbeexcitedaboutgoingtoFranceforyourfirstinternationalconference.

M:Thetrip,yes,butnotthepreparation.

W:Whatdoyouneedtodoexceptpack?

M:Youknowhowyoualwaysfeelsoawfulwheneveryoumakeabigchangeintimezones?ThistimeI'mtryingananti-jet-lagprogramsoI'llbealertevenforthefirstday'slectures.

W:Buthowcanyouavoidjetlag?Withthatlateflightandasix-hourdifferenceintime,it'sboundtotakeyouacoupleofdaystoadjust.

M:Wellthisprogram'ssupposedtogetyourbodytofeellikeit'sinthenewtimezonebeforeyouleave.Thetheoryisthatthefoodyoueatactuallytellsyourbodywhentobeactiveandwhentoberestful,sochangingyourdietcanhelpyoubeready'forthetimechange.Youhavetoalternatefeastingandfasting...youknowsometimeseatalot,sometimesjustalittle.

W:OK.NowIseewhyyou'renotenjoyingthepreparation.Ican'tquitepictureyoufasting!

M:Actuallytheworstisalreadyover.Twodaysbeforetheflight,you'resupposedtohaveonlylightmealsandlimityourselftoeighthundredcalories.

W:Thatmusthavebeentough.

M:Yeah,butI'mmakingupforittoday.Feastdayismuchbetter...thoughIstilldon'tgettoeatanysnacksafterdinner.

(23)

A.Newfoodstotrywhentraveling.

B.Makingreservationsforthebesttravel.

C.Avoidinggainingweightwhiletraveling.

D.Adjustingtotimechangeswhentraveling.

29.(29)

A.Greatpressureonhousing.

B.Risingdemandsofgoods.

C.Theprosperityofthebuildingindustry.

D.Adecliningmarketforgoods.

30.(31)

A.Anessay.B.Amagazinearticle.C.Apoem.D.Ashortstory.

31.聽力原文：W:Tom,getup,please!Ihavetocleanitup.Ourfriendswillbehereatanytimeandthishouseisamess.

M:Sowhat?Theirsisevenworse.

Q:Whatdoesthemanmean?

(19)

A.Hedoesn'tlikemessypeople.

B.Hedoesn'tknowwheretheirhouseis.

C.Heseesnoneedtocleanthehouse.

D.Hecanthinkofnoworsetimefortheirfriendstocome.

32.聽力原文：W:I'vegottwoticketsforavolleyballmatchthisevening.Whydon'tyoucome?

M:Uh...no,thanks.I...I'mnotveryinterestedinvolleyball.

W:Oh,whynot?Haveyoueverseenitplayed?

M:No,Ihave't,butIreallydon't...

W:That'swhatIthought.Youdon'tknowwhatyouaremissing.

M:Don'tI?Why?

W:Becauseit'svery.fast,withlotsofaction.

M:Twoofthebestwomen'steamsintheworld,onefromFinlandandtheotherfromBelgium.

M:Hmm.Itsoundsexciting.

W:Yes,itis!Very!

M:Hmm.Well,perhapsI'llcomeafterall.

W:Good!Now...Uh...couldyou...uh...couldIhavefivepounds,please?

M:Fivepounds?Whatfor?

W:Yourticket,ofcourse.Iboughttwofortheminadvance,hopingI'dpersuadeyoutocomewithme.

M:Oh...uh...Youknow,I'vejustrememberedsomething.

W:What?

M:I'vegottoseesomefriendsthisevening.

W:Oh...Isee...Imean...youwon'tbecoming,afterall,then?

M:No,netunless...

W:Unlesswhat?

M:Perhapsyoucouldletmehavetheticketforabitless?Let'ssaythreepounds.

W:Butyousaidyouhadtomeetsomefriends!

M:Comeon.Iwasonlyjoking.Here'syourfivepounds.OfcoarseI'llcome.

(24)

A.Becausetherearesomanyverypeopleenjoying.

B.Becauseplayerscanbuilduptheirbody.

C.Becauseitisveryfast,withlotsofaction.

D.Becausethevolleyballisinterestingtowatch.

33.聽力原文：M:Thesubway,isrunningbehindscheduleandIdon'tknowifwecangettotheshowontime.

W:It'sabeautifulnight.Let'sgothereonfoot,shallwe?

Q:Whatdoesthewomansuggesttheydo?

(16)

A.Takeataxi.

B.Seetheshowsomeothernight.

C.Getthereonhorse.

D.Walktothetheatre.

34.(21)

A.Featuringnewstarsandfamousones.

B.Makingafull-lengthfeaturefilm.

C.Presentingvariousimagesandeffects.

D.Tellingagoodstoryinafewimages.

35.聽力原文：Ourcultureisconcernedwithmattersofself-esteem.Self-respect,ontheotherhand,mayholdthekeytoachievingthepeaceofmindweseek.Thetwoconceptsseemverysimilarbutthedifferencesbetweenthemarecrucial.

Toesteemanythingistoevaluateitpositivelyandholdithighregard,butevaluationgetsusintotroublebecausewhilewesometimeswin,wealsosometimeslose.Torespectsomething,ontheotherhand,istoacceptit.

Thewordacceptancesuggeststosomereadersthatourculturedoesindeeddealwiththisideaofself-respect;afterall,don'twehavetheconceptthatitisimportanttoacceptourlimitations?Aren'tmanyofusencouragedtochangethethingswecanchange,acceptthethingswecannotchangeandknowthedifferencebetweenthetwo?

Thepersonwithself-respectsimplylikesherselforhimself.Thisself-respectisnotdependentonsuccessbecausetherearealwaysfailurestocontendwith.Neitherisitaresultofcomparingourselveswithothersbecausethereisalwayssomeonebetter.Therearetechniquesusuallyemployedtoincreaseself-esteem.Self-respect,however,isagiven.Wesimplylikeourselvesbecauseofwhoweareandnotbecauseofwhatwecanorcannotdo.

Myrecentresearch,withJudithWhiteandJohnnyWalshatHarvardUniversity,pointstotheadvantageofself-respect.Comparedtothosewithhighself-esteemwhoarestillcaughtinanevaluativeframework,thosewithself-respectarelesspronetoblame,guilt,regret,lies,havesecretsandstress.

Questions29to32arebasedonthepassageyouhavejustheard.

29.Whatdowelearnaboutself-esteem?

30.Whatdowelearnaboutpeoplewithself-respect?

31.Whatdoesthespeakermeanbysaying"Self-respectisagiven"?

32.What'sthepurposeofthepassage?

(33)

A.Itisthesameasself-respect.

B.Itistotallydifferentfromself-respect.

C.Itistoevaluatepositivelyandholdhighregard.

D.Itistothinkonlythepositiveevenwhenwelose.

36.聽力原文：W:InChina,alotofpeoplegetupataboutfiveinthemorning.Thentheygototheparkstodotheirexercises.Manyoldpeopledotaijiquan.

M:InEnglandmoreandmorepeoplegojogginginthemorning,butnotsoearly.Actuallyatfiveo'clockinthemorningeveryoneisstillasleep.

Q:WhatdomostEnglandersusuallydoatfiveo'clockinthemorning?

(16)

A.Theyusuallygojogging.

B.Theyusuallygototheparkstodotheirexercises.

C.TheyusuallydoTaijiquan.

D.Theyarestillasleep.

37.(15)

A.Sheisgoingtoadifferentconcert.

B.Shedoesn'tlikethepark.

C.Sheisn'tinterestedintheconcert.

D.Sheprefersattendingconcertstowritingpaper.

38.(36)

A.Becausethewhaleshunttooclosetotheshores.

B.Becausethewhalesfailedtodetecttheslopingcoastlines.

C.Becausehumanactivitiesaffectwhales'livesdeeply:

D.Thereasonisstillunknown.

39.

【B9】

40.(38)

三、4.ReadingComprehension(ReadinginDepth)(20題)41.GeneticallyModified(轉基因的)cropsareeverywhere.ItseemseveninEurope,strictlawsdesignedtokeeptheEuropeanUnionfreeofGMcropsandproductsarenotworking,insteadareposingproblemsfortheEU:Farmers'representativessaythatsuppliesofanimalfeedforpoultryandpigsarebeingrefusedentryatEuropeanportswhenfoundtocontaineventraceamountsofGMmaterial.

UnderEurope's"zero-tolerance"lawsonGM,introducedin2007,thepresenceofevenafewseedsofGMmaterialwillruleoutanentireshipment.TheanimalfeedindustrysaysthatthelawsareunworkablebecauseGMmaterialisalmostunavoidable,giventoday'sglobalsupplychain."ThoughweunderstandtheconsumerconcerninEurope,wedon'tunderstandzerotolerancebecauseitclosesdowntrade,"saysPekkaPesonen,secretarygeneralofCopa-Cogeca,afederationofgroupsrepresenting15millionEUfarmersintotal.HeclaimsthatEuropeanpigandpoultryfarmerswillgooutofbusinessunlesstheEUadoptsamorepracticalcheckingapproachbysettingastandard-say0.5percentbeneathwhichGMistolerated.Pesonensayssuch"tolerances"operateforotherpollution,includingpesticidesandheavymetals.SowhynotforGMmaterial,muchofwhichhasbeenclearedforhumanconsumptionelsewhereintheworld?

Lastyear200000tonsofconventionalanimalfeedmainlysoyandcorn—wererefusedentrytotheEUwhentheywerefoundtocontainsmallamountsofGMcornvarieties.Thenflax(亞麻)fromCanadawasfoundtocontaintracesofaGMvarietynamedCDCTriffidthatwaswithdrawnfromcommercialsalein2001.Followingaprohibitiononflaxmorethan100shipmentswererejected,buttradeisslowlyresuming.Therejectedtonnageisonlyasmallpartofthe32milliontonsoffeedimportedeachyear.Butitleadstodelaystosubsequentcontracts,higherpricesandreluctancebyimporterstoriskfurthershipments.

Priceswillbehigherstillthisyear,saysPesonen,owingtonaturaldisasterinSouthAmericaandagrowingmarketforAmericanfarmerssellingcropstoAsia,whichacceptsmixedshipments.IncreasingnumbersofGMcropvarietiesareontheway.Atpresent,around30varietiesaregrownaroundtheworld,butthatispredictedtodoubletwiceby2015,makingscreeningmoredifficultthanever.

AfurtherconflictarisesbecausealltheEuropeanofficialsareduetobereplacedinFebruary.Aspokeswomanforthehealthcommission,whichintroducedthezero-tolerancepolicytosatisfywidespreadquestioningsinEuropeaboutthesafetyofGMcrops,saysthatintensivediscussiononfeedimportshavealreadytakenplace."Oncethenewcommissionisestablished,itwillhavetoconsiderhowtoproceedonthismatter,"shesays.

EuropeanlawsagainstGMproducts______.

A.managetofunction

B.bringtroublestofarmers

C.helpfarmerstogetsafeanimalfeed

D.allowfoodwithinsignificantamountofGM

42.Theprimarypurposeofthetextisto_____.

A.discusstheimportanceofGriffithtothedevelopmentofthecinema

B.describetheimpactoncinemaoftheVictorianliteratureandart

C.analyzethechangesinthecinemabroughtbytheintroductionofthemultireelfilm

D.emphasizeGriffith'simpactonthechoiceofsubjectmatterinAmericanfilms

43.

【C10】

44.

Accordingtotheauthor,therewasatrendintheU.S.fortheyoungpeople______.

A.tospeakStandardEnglish

B.tospeakEnglishwithoutclassdistinction

C.tospeakEnglishwithclassdistinction

D.tospeakEnglishwithgrammarmistakes

45.

HowmanydayswastheTitanicatseabeforesinking?

46.

【C8】

47.AnAsianengineerisassignedtoaUSlaboratoryandalmostsuffersanervousbreakdown.AUSexecutivetellshisstaffhe'sgoingtotreatthemfairly--andcreatesdissension(紛爭).AJapanesemanagerispromotedbyhisBritishpresident,butwithinsixmonthsasksforatransfer.Eachofthesereal-lifecasesinvolvedpeoplewhowereregardedassuperioremployees,butwereill-equippedtocopewiththecomplexitiesanddangersofinterculturalmanagement."Multinationalcompanieshavestudiedeverythingelse,nowthey'refinallylookingatculture,"saysCliffordClarke,founderandpresidentoftheCalifornia-basedIRIInternationalInc,oneofasmallbutgrowingnumberofconsultingfirmsthatspecializeinteachingbusinesspeoplefromdifferingcultureshowtocommunicateandworkwitheachother.

"NevershowthesoletoanArab,neverarriveontimeforapartyinBrazil,andinJapan,don'tthink'yes'means'yes',adviseUSconsultantsLennieCoplandandLewisBrownGriggs,whohaveproducedaseriesoffilmsandabooktohelpmanagersimprovetheirinternationalbusinessskills.Butsimplylearningthesocial"dos"and"don'ts"isnottheanswer,accordingtothenewculturespecialists.Thepenaltiesforignoringdifferentthinkingpatterns,theypointout,canbedisastrous.Forexample,theAmericanmanagerwhopromisedtobefairthoughthewastellinghisJapanesestaffthattheirhardworkwouldberewarded,butwhensomeworkersreceivedhighersalaryincreasesthanothers,therewerecomplaints."Youtoldusyou'dbefair,andyouliedtous,"accusedonesalesman."Ittookmeayearandahalf",sighedtheAmerican,"torealizethat'fair'tomystaff,meantbeingtreatedequally."

TheAsianengineerwhosufferedinAmericawasthevictimofanothermistakenexpectation."HewasaccustomedtothewarmgroupenvironmentsotypicalinJapan,"saidhisUS.manager."Butinourcompany,we'reallexpectedtobeself-starters,whothriveonworkingalone.Forhim,itwasemotionalstarvation.He'smadetheadjustmentnow,buthe'dbehumiliatedifItoldyouhisname,That'sanotherculturaldifference."

TheJapanesemanagerwhofailedtorespondtohispromotioncouldn'tbringhimselftousethemoredirectlanguageneededtocommunicatewithhisLondon-basedsuperiors."Iusedtothinkallthistalkaboutculturalcommunicationwasalotofbaloney,"saysEugeneJ.Flath,presidentofIntelJapanLtd.,asubsidiaryoftheAmericansemiconductormaker."Now,Icanseeit'sarealproblem.Miscommunicationhasslowedourabilitytocoordinateactionwithouroffice."

That'swhyIntel,withthehelpofconsultantClarke,begananinterculturaltrainingprogramthisspringwhichFlathexpectswilldramaticallyreducedecision-makingtimenowlostinmakingsuretheAmericansandtheJapaneseunderstandeachother.

Thebesttitleforthepassagewouldbe______.

A.BuildingBridgesovertheCulturalRivers

B.MultinationalTrainingforBusinessmen

C.LearningDifferentThinkingPatterns

D.CommunicationProblemsandComplaints

48.SectionB

Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.Youshoulddecideonthebestchoice.

Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglassintheroofofagreenhousewhichallowsthesun'sraystoenterbutpreventstheheatfromescaping.Accordingtoaweatherexpert'sprediction,theatmospherewillbe3℃warmerintheyear2050thanitistoday,ifmancontinuesto'burnfuelsatthepresentrate.Ifthiswarminguptookplace,theicecapsinthepoleswouldbegintomelt,thusraisingsealevelseveralmetersandseverelyfloodingcoastalcities.Also,theincreaseinatmospherictemperaturewouldleadtogreatchangesintheclimateofthenorthernhemisphere,possiblyresultinginanalterationofearth'schieffood-growingzones.

Inthepast,concernaboutamanmadewarmingoftheearthhasconcentratedontheArcticbecausetheAntarcticismuchcolderandhasamuchthickericesheet.ButtheweatherexpertsarenowpayingmoreattentiontoWestAntarctic,whichmaybeaffectedbyonlyafewdegreesofwarming,inotherwords,byawarmingonthescalethatwillpossiblytakeplaceinthenextfiftyyearsfromtheburningoffuels.

SatellitepicturesshowthatlargeareasofAntarcticicearealreadydisappearing.Theevidenceavailablesuggeststhatawarminghastakenplace.Thisfitsthetheorythatcarbondioxidewarmstheearth.

However,mostofthefuelisburntinthenorthernhemisphere,wheretemperaturesseemtobefalling.Scientistsconclude,therefore,thatuptonownaturalinfluencesontheweatherhaveexceededthosecausedbyman.Thequestionis,whichnaturalcausehasmosteffectontheweather?

Onepossibilityisthevariablebehavior.ofthesun.Astronomersatoneresearchstationhavestudiedthehotspotsand"cold"spots(thatis,therelativelylesshotspots)onthesun.Asthesunrotatesevery27.5days,itpresentshotteror"colder"facestotheearth,anddifferentaspectstodifferentpartsoftheearth.Thisseemstohaveaconsiderableeffectonthedistributionoftheearth'satmosphericpressure,andconsequentlyonwindcirculation.Thesunisalsovariableoveralongterm:itsheatoutputgoesupanddownincycles,thelatesttrendbeingdownward.

Scientistsarenowfindingmutualrelationsbetweenmodelsofsolar-weatherinteractionsandtheactualclimateovermanythousandsofyears,includingthelastIceAge.TheproblemisthatthemodelsarepredictingthattheworldshouldbeenteringanewIceAgeanditisnot.Onewayofsolvingthistheoreticaldifficultyistoassumeadelayofthousandsofyearswhilethesolareffectsovercometheinenia(慣性)oftheearth'sclimate.Ifthisisright,thewarmingeffectofcarbondioxidemightthusbeservingasausefulcounter-balancetothesun'sdiminishingheat.

Aconcentrationofcarbondioxideintheatmospherewould______.

A.preventthesun'sraysfromreachingtheearth'ssurface

B.meanawarmingupintheArctic

C.accountforgreatchangesintheclimateinthenorthernhemisphere

D.raisethetemperatureoftheearth'ssurface

49.

AchieffactorinbringingdownthebirthsinEuropeinthe19thcenturyis______.

A.birthcontrol

B.thedesiretoseekfortuneincities

C.theinstabilityofmarriage

D.thechangedplaceofwomen

50.

【C5】

51.

Accordingtothelastparagraph,itisvitaltoanalyzeandstudy______.

A.changesinorganiclife

B.thewaysinwhichcellsareformed

C.processesonwhichorganiclifedepends

D.themainwaysinwhichorganismsdevelop

52.

Theextremeviewoftheauthoristhatchildren'sprogressshouldonlybeassessedby______.

A.educatorsB.childrenthemselvesC.teachersD.parents

53.

Theexistenceofthiscurrencyshowsthat______.

A.moneyisaneconomicsophistication

B.thenativesoftheSantaCruzIslandsarehighlycivilized

C.useofmoneyisnotlimitedtohighlycivilizedpeople

D.alloftheabove

54.(57)

55.

WhichofthefollowingdoesNOTbelongto"deeper"usesoftechnologyaccordingtothepassage?

A.TogetinformationfromWorldWideWeb.

B.Toaidvisualizationfacilitatecollectiveactivityamongstudents.

C.Aidvisualizationandsimulatecomplexenvironments.

D.Supportanalysisandsynthesisofinformation.

56.

Itisimpliedinthepassagethat______.

A.the