2021-2022年内蒙古自治区乌兰察布市大学英语6级大学英语六级测试卷(含答案)

2021-2022年内蒙古自治区乌兰察布市大学英语6级大学英语六级测试卷(含答案)学校:________班级:________姓名:________考号:________

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

Evenasthepresidentofaworldwidecompany,SoichiroHondawouldworkattheresearchlabwiththeemployees.

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2.Whatdowelearnabouttheboundariesofchoiceblindness?

A.Theboundariesareimpossibletobemarked.

B.Itoccursonlywhendecisionsarenotimportant.

C.Itcouldhappeneveninthesignificantevents.

D.Brideswon'thavechoiceblindnessintheweddings.

3.TheCanadiangovernmentdidn'twanttoreducecod.catchespre-1992becausetheywereworriedabout______.

A.drasticmeasures

B.theecologicaleffects

C.themarineecosystem

D.possiblerisingunemployment

4.

ThetwomajorshiftstheU.S.populationisundergoingarechangesingeographicdistributionandin______.

5.

AvarietyofgasestrappedintheEarth'satmospherecanensurelifeonEarthbecausetheyare______.

6.Incaseoftheblack/whitetrickinadvertising,manypeoplewouldbuytheproductforitsgoodquality.

7.Overcomingprocrastination:APracticalApproach

Doyoufindthatyouoftenbegincorrespondencewithaphraselike,"I'msorryit'stakenmelongtogetbacktoyou,"or,"Myapologiesforthedelayinresponding"?Thismaybeanindicationthatyou'reinthehabitofpurringthingsoff.Similarly,adeskoffilesfilledwithprojectswhichyouhaveyettobeginorwhicharepartiallycompletedbutinactive,isanothersuresignthatthere'sproblem,ffyouareoneofthosepeoplewhoinsistsoncleaningupallthelittleprojectsawaitingyou,inordertoremovethose"bothersomelittlethings"beforeyoubeginamajorproject,youareactuallyengaginginprocrastinationbyallowingyourselftofallvictimtothe"tyrannyofthetrivial".

Reasonsforprocrastination

Likemanyissuesinvolvingtimemanagement,procrastinationisabehavioralproblem,andlikeallsuchproblemsitcan,withsufficientmotivation,bechanged.Inordertochangeabehavioralparrem,however,itisnecessarytounderstandthereasonsforthatbehavior.

Don'tknowwheretostart

Ifyouthinkaboutit,thetaskswhichyoutendtopostponewillgenerallyfallintotwocategories.Thefirstoftheseisthefairlylargeorcomplextask.Suchtasksaregenerallyimportantintheiroutcome,whichonlyaddstothepressuretodoagoodjob,andyettheirverycomplesitymakesitdiffculttoknowjustwhereorhowtobegin.Theresultisthatthetaskisputoffuntilitsimplyhastobedealtwith.

Anunplesanttask

Thesecondcategoryoftaskcommonlypostponedisthatwhichiseitherunpleasanttodoormayhaveunpleasantconsequences.Thismaybesomeaspectofyourworkthatyousimplydon'tenjoy,oritmaybesomethinglikeanegativejobappraisalforanemployee,forwhichyouknowtherewillberepercussions.Again,thetaskisputoffuntilotherpressuresmakeitnecesaryforittobetackled.

Fearoffailure

Onahitmore"psychological"note,therearethosewhoputofftasksbecausetheyhaveasubconsciousfearthattheywillnotbeabletoperform.themsatisfactorily.Relatedtothisarcthosewhoholdthemselvestothestandardofperfectionforallworktheydo.Ifyoususpectthattheirworkwillbelessthanperfecttheymaybeinclinedtoputitoff.

Excusingsub-standardperformance

Attheoppositeendofthespectrumarethosewhouseprocrastination(generallynotonaconsciouslevel)asameansofexcusingworkwhichtheyknowisofpoorquality."IcouldhavedonebetterifI'dhadmoretime,"isthegeneralrefrainofsuchpeople,thoughoncloserexaminationitmaybefoundthattheydidn'thavetimebecausetheychosetoprocrastinate.Keepinmind,ofcourse,thattherearesomeprojectswhichdocomeupasemergenciesandforwhichyoureallydon'thavesufficienttime,sodon'tassumethatthisrefrainisalwaysasignofaprocrastinationproblem.

OvercomingProcrastination

Itisimportantthatyoutakethetimetorecognizewhichreasonsapplymosttoyouortoyourstaffmembers.Bydoingsoyouwillbeabletoselectfromthesolutionsthatfollow,theoneormorethatwillbesthelpyoutoovercomeprocrastination.

UsetheSWAPapproach.Ifyouanalyzeanoverwhelmingtaskthatiscurrentlyfacingyou,youwillprobablyfindthatitcanbebrokendownintoanumberofsmaller,moremanageablepieces.Alogicalorderwillemergeforcomplitingeachpart,oryoumayhavetoimposesuchanorderonthecomponentparts.YoucanthenSWAP—StartWithAPart.Andifyou'velistedthevariouspartsinwriting—whichisrecommended—youcanhavethepleasureofcrossingthemoffstepbystep,andseeingavisualrepresenta

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8.

Traditionalmediaoutletssuchas______maystillhoaxtheiraudiencesnowadays.

9.

Becauselittleresearchhadbeendoneontheexplanationofhappiness,beforegoingintothelab,Lyubomir-skyhaddonesome______.

10.

AtHighTechHigh,______arehiredtoteachcomesonbiotechnologyorwebdesign.

11.

In2004moretravelerspaidvisittocentralParisthantoNewYorkCity.

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12.

SingaporeansbelievethatalackofChinese-speakingskillsisadisadvantageinthe21stcentury.

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13.

Glaciersaremuchthickerthanpreviouslythought,whichmeans______intotheocean.

14.

DifferentversionsofAdhcan______toafruitfly'ssurvival.

15.

ThelargestnumberofrainforestsintheworldarelocatedontheAfricancontinent.

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16.

Thosewhoavoidcompetitivesportsinfavourofnoncompetitivephysicalactivitiesseemtobelookingfor______.

17.WhentoWorryAboutaFever

THEPANICKEDCALLwokeDr.SuzanneCorriganat2a.m.Awomancried,"Mychildhasahighfever.WhatshouldIdo?"

TheIrving,Texas,pediatricianquicklyasked:Howoldistheyoungster?Howhighisthefever?"Itturnedoutthatthefevermeasured101degreesrectallytheequivalentof100degreesorally,"saysCorrigan."Andthebaby,a15-month-old,hadfallenbacktoapeacefulsleep."

Themotherhadworriedthatthefevermightgoupquicklyifshedidn'twakethechildtogivemedication.Corriganreassuredherthatthefeverwasmildandsimplythebody'snaturalresponsetofightingoffaninvader,mostlikelyaaims..Thedoctoradvisedhertoletthebabysleep,unlessothersymptomsappeared.

"Likemanypeople,thismothermistakenlyassumethathavingafevermeansyou'reseriouslyill,"saysCorrigan,oftheAmericanAcademyofPediatrics."Itellpatientsthatfeveritselfisn'tanillness.It'showthebodyrevsuptheimmunesystemtodefendagainstinfection."

Anunreasonablefearofelevatedtemperature,acommonreaction,iscalled"feverphobia"byDr.BartonD.Schmitt,professorofpediatricsatTheChildren'sHospitalinDenver.Fewpeople,saysSchmitt,realizethatfeveritselfisrarelydangerous,andbytreatingitaggressivelywithaspirinoracetaminophen,theymayactuallyslowrecovery.

Herearesixsurprisingfactsaboutfeveryoushouldknowtoprotectyourselfandyourfamily.

1Theconceptof98.6asthebody's"normal"temperatureisoutofdate.

SaysDr.PhilipA.MackowiakoftheUniversityofMarylandSchoolofMedicine:"Thenormaltemperatureisactuallyarangeratherthanonesinglenumber.Andthere'sagreatdealofindividualvariation."

Thebody'snaturalcircadianrhythmspromptdailytemperaturefluctuationsofaboutonedegreeFahrenheit,butsomepeoplehaveoscillationsaswideas2.4degreesorasnarrowas0.1degree.Childrentendtohaveslightlyhighernormaltemperaturethanadultsandaremorelikelytorunhighfeversinresponsetoinfection.Elderlypeopletendtohavelowerbodytemperaturesthanyoungeradults.

Ordinaryactionscanraisetemperature:digestingabigmeal,beinginthesun,prolongedcryinginbabies,exercise.Butbodytemperaturerarelyriseshigherthanabout106.5degreeswithtwomainexceptions:atraumaorturnerthatdamagesthehypothalamus(thepartofthebraincontrollingtemperature),and,morecommonly,heatstroke,whichmustbetreatedimmediatelytopreventdamagetobodyorgans,ordeath.

2Takingmedicationtolowerafevermayprolongillness.

Here'showfeverworks:Whenwhitebloodcellsrecognizeanintruder,theyreleaseproteinsthattraveltothehypothalamusandpromptittoraisethebody'sthermostat.Thebodyreactstothisbygeneratingheat,oftenthroughshivering."Manyimmunologicalfunctionsappeartobemoreefficientatahighertemperature,"sayspediatricianTimothyDoranofTheJohnsHopkinsUniversitySchoolofMedicine."Andsomebacteriaandvirusesdon'tgrowaswellathighertemperatures."

Recentstudiesshowthatwhenanimalsareexposedtobacteriabutpreventedfromrunningafever,manydieofinfectionstheymighthavesurvived.Doranresearchedchildrenwithchickenpox,andfoundthat"ittookthosewhoweregivenacetaminophenabouthalfadaylongertorecover"thanitdidthosewhosefeverswhereuntreated.

Whilemostpeopleareprobablybetteroffnotsuppressingfeversthatcausenodiscomfort,thereareexceptions.Coronarypatientsandthosewithsuchchronicconditionsasarthritisanddiabetesshouldcontacta.physicianimmediately.

Tobalancetherisksandbenefitsoftreatingfever,alotdependsonthepatient'scomfort."Datashowthatfeverdoesgo

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18.

ThereareseveralfactorsresponsibleforthedramaticdecreaseintheGiantPanda'spopulation:poaching,______,thepanda'slowreproductiverateandbambooflowering.

19.

Mr.Symondsandhisassociateswere______withtheauthor'sreplies.

20.

Globalizationisdistinctfromthetheorywhichclaimsthatculturalglobalismissimplytheconsequenceofeconomicglobalism.

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二、3.ListeningComprehension(20题)21.(31)

A.Theworkersontheundergroundplatformswerereplacedbymachines.

B.Itbecamethefirstcompletelyautomaticrailwayintheworld.

C.Acompletelyautomaticlinewasaddedtoitsnetwork.

D.Computersbegancontrollingthetrainsontheline.

22.

【B7】

23.听力原文：M:MathsDepartment,DoctorWebsterspeaking.

W:Hello,Prof.Webster,thisisJanetHillcalling.Ilivetwodoorsdownfromyourteachingassistant,DonWilliams.Donaskedmetocallyoubecausehehaslosthisvoiceandcan'ttalktoyouhimself.

M:Losthisvoice.Oh,whatashame!IsthereanythingIcandoforhim?

W:Well,hehasaclassthisafternoonfromtwo-thirtytofourandhewon'tbeabletoteachit,buthedoesn'twanttocanceliteither.

M:DoeshewantmetotrytofindsomebodyelsetoteachtheClass?

W:No,notexactly.Whathewantstodoistogetsomeonegoinforhim,justtopassbackthemid-termexams.He'salreadymarkedthemandtheyareonthedeskinhisoffice.Thewholethingwouldn'ttakemorethantenminutes.

M:Hisclassesaretwo-thirty,yousay?Well,I'mfreeatthattime,andIwasgoingtobeoncampusanyway,soIcoulddoitforhim.Whatroomishisclass?

W:CaterHall.Room214.Willyouneedhisofficekeytogettheexams?He'sgivenittomeandIcouldbringittoyou.

M:Actually,thatwon'tbenecessary.Wehaveamasterkeyinthemathsdepartment.SoIcangetintohisofficeifnecessary.

W:Thankyouverymuch,Prof.Webster.Dondoesn'thaveanotherclasstoteachuntilTuesday,andhopefully,hewillbeabletotalkbythen.He'IIcallyouassoonashecan.Oh,yes,Ialmostforgot.

M:Yes?

W:Couldyouputthenextassignmentontheboard,too.It'salltheproblemsonpagefourty-five,andtheyaredueatthenextclass.

M:Notroubleatall.ThanksforpassingallthenewsaboutDon,andpleasetellhimnottoworryaboutanything.

(23)

A.Hecan'tfindhisofficekey.

B.Hehasmisplacedsomeexams.

C.Heisunabletotalk.

D.Hedoesn'tlikehisclassroom.

24.(16)

A.They'llhavetogetsomemorepaint.

B.Theyshouldgetsomeonetohelpthem.

C.Theyshouldn'tdelayanylonger.

D.Theydon'thavetopainttheroomagain.

25.(29)

A.Thelungs.

B.Theheart.

C.Thecirculation.

D.Alloftheabove.

26.

【B9】

27.(28)

A.Thedirectiontoflyin.

B.Thedistancetofly.

C.Theheighttofly.

D.Thekindoffoodtofind.

28.(43)

29.(35)

A.Aspecialmilkbottle.

B.Amethodtotakewateroutofmilk.

C.Awaytokillbacteriainmilk.

D.Machinestofillbottlesautomatically.

30.(22)

A.Becausetheytookyoubysurprise.

B.Becauseyouwerebothpretending.

C.Becauseyouweren'tpayingattention.

D.Becauseyourmarriagewasn'tperfect.

31.(30)

A.Thenumberoftheiraccounts.

B.Withholdingclientinformation.

C.Beingmysterioustotheoutsiders.

D.Attractingwealthyforeignclients.

32.(24)

A.Toattendaconference.

B.Toseetheplanetarium.

C.Tochangeplanes.

D.Togosightseeing.

33.(25)

A.Hegoestomovies,watchesTV,andreadsnewspapersandmagazines.

B.Hemakesfriendswhospeakthelanguage.

C.Hegoestoclasses.

D.Hestudiesgrammarandvocabulary.

34.(46)

35.听力原文：W:(22)Goodmorning,sir.WhatcanIdoforyou?

M:(22)Hi,I'mlookingintogettingsomefurnitureandotheritemsmovedfromthestorageintomynewhome.

W:Allright.Howfarawayfromthewarehouseisyourhome?

M:Onlyafewhundredyards,buttheitemsareratherlargeandheady.Iwasstudyingoverseasforthepasttwoyearsandjustrecentlyreturned,sowhileIwasgoneIhadtoputallofmyfurnitureandothermajorpossessionsintostorage.

W:OK,Ijustneedtogetsomedetailsfirst.Whatkindofhouseisit?

M:Ithasthreerooms.

W:Andhowmanyentrancesdoesithave?

M:Hm,isthatactuallyrelevant?

W:(24)Yes,becauseitusuallyaffectsthecostofthelabor.It'seasiertomoveitemsintoahousewithmoreentrances.So,theoveralltimeandcostoflaborwillbecheaper.

M:Well,Ihadn'tthoughtofthatbefore.(23)Hm,ithastwo,no,wait,threedoors.

W:OK,threedoors.Andthelocation?

M:1966,FinchAve.

W:Allright.Andwhataretheitemsyouwanttomoveonthefirsttrip?

M:(25)IsupposeI'dliketogetmybedandrefrigeratormovedinfirst.I'vegotsomechairsandmykitchentableanddiningset.Iwantthemtobeinthehouseearlier,too.Astothevaluables,IthinkIcanmovethemonmyown.

W:Noproblem.NowwejustneedtogettheweightofeachitemandthenIcantellyouhowmuchthecostis.

(23)

A.Landlordandtenant.

B.Customerandreceptionist.

C.Clientandphoneoperator.

D.Customerandshopassistant.

36.听力原文：M:Canyoutellmeabouttheuniversityshuttlebussystem?Thisissuchalargecampus,andIhaveclassesallovercampus.Ineedtotaketheshuttlebusfromoneclasstoanother,orI'llnevermakeitontime.

W:Whatdoyouneedtoknow?Ithinkit'sareally~eatsystem.

M:Firstofall,wheredoesitgo?

W:Theuniversityshuttlebussystemgoesallovercampus.Itdoesn'tleavethecampus;ifyouwanttotraveloff-campus,you'llneedtotakethecitybussystem.Buttheuniversityshuttlebussystemwillgetyoufromoneclasstothenextveryefficiently.

M:Andhowmuchdoesitcost?

W:I'tsfree,canyoubelieveit?Soyoudon'thavetopayacenttogetallaroundtheuniversitycampus.

M:That'sreallygreat.AndhowdoIcatchtheshuttlebus?

W:Justlookforoneofthebrightyellowshuttlebussigns,andgosandnexttoit.Youcanseetheyellowshufflebussignsallovercampus.Ashuttlebuswillcomealongapproximatelyeveryfiveminutes,soyoushouldn'thavetowaitlong.

M:Thatsoundsgood.Thanksforyourhelp.

W:Noproblem.

(20)

A.Thesizeofthecampus.

B.Thecitybussystem.

C.Thelengthoftimeforeachclass.

D.Theuniversitybussystem.

37.SectionC

Directions:Inthissection,youwillhearapassagethreetimes.Whenthepassageisreadforthefirsttime,youshouldlistencarefullyforitsgeneralidea.Whenthepassageisreadforthesecondtime,youarerequiredtofillintheblanksnumberedfrom36to43withtheexactwordsyouhavejustheard.Forblanksnumberedfrom44to46youarerequiredtofillinthemissinginformation.Fortheseblanks,youcaneitherusetheexactwordsyouhavejustheardorwritedownthe

Ascientistwhodoesresearchineconomicpsychologyandwhowantstopredictthewayinwhichconsumerswillspendtheirmoneymuststudyconsumerbehavior.Toform.roundconclusion,hemust【B1】______databothonresourcesofconsumersandonthe【B2】______thattendtoencourageordiscouragemoneyspending.

Ifaneconomistwereaskedwhichofthreegroupsborrowmost—peoplewithrisingincomes,【B3】______incomes,ordecliningincomes—hewouldprobablyanswer:thosewithdecliningincomes.Actually,intheyears1947-1950,theanswerwas:peoplewithrisingincomes.Peoplewithdecliningincomeswerenextandpeoplewithstableincomesborrowedtheleast.Thisshowsusthattraditional【B4】______aboutearningandspendingarenotalways【B5】______.Anothertraditionalconclusionisthatifpeoplewhohavemoneyexpectpricestogoup,theywill【B6】______tobuy.Iftheyexpectpricestogodown,theywillpostponebuying.Butresearch【B7】______haveshownthatthisisnotalwaystrue.Theexpectationsofpriceincreasesmaynot【B8】______buying.

【B9】______."Inafewmonths,"shesaid,"we'llhavetopaymoreformeatandmilk;thatistosaywe'llhavemuchlesstospendonotherthingsweneed.It'sreallyannoying."【B10】______.Furthermore,theriseinpricesthathasalreadytakenplacemayberesentedandbuyer'sresistancemayarise.【B11】______.

【B1】

38.(36)

A.FromLandAnimaltoKingoftheSea

B.TheFoodoftheWhale

C.TheWhale'sAncientAncestor

D.HowWhalesCatchFood

39.(26)

A.Helpthewomanpaythemechanic'sbill.

B.Helpthewomanfixhercar.

C.Takethewomantoherhome.

D.Test-drivethewoman'scar.

40.(15)

A.Hesuggeststhewomannottofinishtheplan.

B.Headvicesthewomantosearchmoreinformation.

C.Hetellsthewomantomakeanotherplan.

D.Heasksthewomantodotheplanwiththeinformationtheygot.

三、4.ReadingComprehension(ReadinginDepth)(20题)41.SectionA

Directions:Inthissection,thereisashortpassagewith5questionsorincompletestatements.Readthepassagecarefully.Thenanswerthequestionsorcompletethestatementsinthefewestpossiblewords.

Bythemid-nineteenthcentury,theterm"icebox"hadenteredtheAmericanlanguage,buticewasstillonlybeginningtoaffectthedietofordinarycitizensintheUnitedStates.Theicetradegrewwiththegrowthofcities.Icewasusedinhotels,taverns(酒馆),andhospitals,andbysomeforward-lookingcitydealersinfreshmeat,freshfish,andbutter.AftertheCivilWar(1861-1865),asicewasusedtorefrigeratefreightcars,italsocameintohouseholduse.Evenbefore1880,halfoftheicesoldinNewYork,Philadelphia,andBaltimore,andone-thirdofthatsoldinBostonandChicago,wenttofamiliesfortheirownuse.Thishadbecomepossiblebecauseanewhouseholdconvenience,theicebox,aprecursorofthemodernfridge,hadbeaninvented.

Makinganefficienticeboxwasnotaseasyaswemightnowsuppose.Intheearlynineteenthcentury,theknowledgeofthephysicsofheat,whichwasessentialtoascienceofrefrigeration,wasrudimentary(未发展的).Thecommonsensenotionthatthebesticeboxwasonethatpreventedtheicefrommeltingwasofcoarsemistaken,foritwasthemeltingoftheicethatperformedthecooling.Nevertheless,earlyeffortstoeconomizeiceincludedwrappinguptheiceinblankets,whichkepttheicefromdoingitsjob.Notuntilneartheendofthenineteenthcenturydidinventorsachievethedelicatebalanceofinsulationandcirculationneededforanefficienticebox.

"Butasearlyas1803,andingeniousMarylandfarmer,ThomasMoore,hadbeenontherighttrack.HeownedafarmabouttwentymilesoutsidethecityofWashington,forwhichthevillageofGeorgetownwasthemarketcenter.Whenheusedaniceboxofhisowndesigntotransporthisbuttertomarket,hefoundthatcustomerswouldpassuptherapidlymeltingstuffinthetubsofhiscompetitorstopayapremiumpriceforhisbutter,stillfreshandhardinneat,one-poundbricks.Oneadvantageofhisicebox,Mooreexplained,wasthatfarmerswouldnolongerhavetotraveltomarketatnightinordertokeeptheirproducecool.

Whatisthetopicofthepassage?

42.

Accordingtothepassage,insectscansee______whichhumanscan'tsee.

43.

Wecaninferfromthesecondparagraphthat______.

A.theyounggenerationdiffersfromtheoldintheirattitudetowardlife

B.theyounggenerationseekstopossessmorematerialwealth

C.theoldareregretfulfortheirpastpersonallives

D.theoldhavebeentryingtokeepupwithmodernlife

44.Itcanbeinferredfromthepassagethat______.

A.flexibleworkinghourssatisfiesboththeemployersandemployees

B.children'sopinionshouldbetakenintoconsideration

C.flexibleworkinghourshasbeenexistingfortoolong

D.thegovernmentismakingeffortinhelpingparents

45.

Wecanconcludefromthepassagethatusinganelectriccarcan______.

A.savemoremoneythanusingtheregularcarsineveryway

B.preventpollutionandsaveenergyinthelongrun

C.attractmorecustomerstobuyVSPs

D.soonleadtoeliminatingtraditionalcars

46.

Whatcanwelearnabout"Googleprofile"fromPara.3?

A.Itaimsatmakingpeoplehavemoreskillstocontrolthesearchresults.

B.Userscanaddtheirpersonalinformationtoit.

C.Theusers'names,jobs,positionsandphotoscanbefoundinit.

D.GoogleprofileisasubstituteforFacebookpage.

47.

Whydidtheparentsmentionedinthethirdparagraphleavethechildaloneinaroom?

48.Before1965manyscientistspicturedthecirculationoftheocean'swatermassasconsistingoflargeslow-movingcurrents,suchastheGulfStream.Thatview,basedon100yearsofobservationsmadearoundtheglobe,producedonlyaroughapproximationofthetruecirculation.Butinthe1950sandthe1960s,researchersbegantoemploynewlydevelopedtechniquesandequipmentincludingsubsurfacefloatsthatmovewithoceancurrentandemitidentificationsignalsformonthsatfixedlocationsintheocean.Theseinstrumentsdisclosedanunexpectedlevelofvariabilityinthe'deepocean.Ratherthanbeingcharacterizedbysmooth,large-scalecurrentsthatchangeseasonally(ifatall),theseasaredominatedbywhatoceanographers(海洋研究者)callmesoscalefields(紊流):fluctuating,energeticflowswhosevelocitycanreachtentimesofthemeanvelocityofthemajiorcurrents.

Mesoscalephenomena--theoceanicanalogueofweatherterms--oftenextendtodistancesof100kilometersandpersistfor100days(weathersystemsgenerallyextendabout1000kilometersandlast3to5daysinanygivenarea).Morethan90percentofthekineticenergyoftheentireoceanmaybeaccountedforbymesoscalevariabilityratherthanbylarge-scalecurrents.Mesoscalephenomenamay,infact,playasignificantroleinoceanicmixingair-seainteractions,and'occasionalbutfar-reachingclimateeventssuchasEINino,theatmospheric-oceanicdisturbanceintheequatorialPacificthataffectsglobalweatherpatterns.

Unfortunately,itisnotfeasibletouseconventionaltechniquestomeasuremesoscalefields.Tomeasurethemproperly,monitoringequipmentswouldhavetobelaidoutonagridatintervalsofatmost50kilometers,withsensorsateachgridpointlowereddeepintheoceanandkeptthereformanymonths.Becauseusingthesetechniqueswouldbeprohibitivelyexpensiveandtime-consuming,itwasproposedin1975thattomography(X射线断层摄影技术)beadaptedtomeasuringthephysicalpropertiesoftheocean.InmedicaltomographyX-raysmapthehumanbody'sdensityvariations(andhenceinternalorgans);theinformationfromtheX-rays,transmittedthroughthebodyalongmanydifferentpaths,isrecombinedtoform.three-dimensionalimagesofthebody'sinterior.Itisprimarilythismultiplicativeincreaseindataobtainedfromthemulti-pathtransmissionofsignalsthataccountsforoceanographers'attractiontotomography:itallowsthemeasurementofvastareaswithrelativelyfewinstruments.Researchersreasonedthatlow-frequencysoundwaves,becausetheyaresowelldescribedmathematicallyandbecauseevensmallperturbations(动摇)inemittedsoundwavescanbedetected,couldbetransmittedthroughtheoceanovermanydifferentpathsandthatthepropertiesoftheocean'sinterior-itstemperature,salinity,densityandspeedofcurrents-couldbededucedonthebasisofhowtheoceanalteredthesignals.Theirinitialtrialswerehighlysuccessful,andoceanacoustictomographywasborn.

WhichofthefollowingisTRUEaccordingtoPara.1?

A.Nowadays,scientistspicturedthecirculationofocean'swatermassasconsistingoflargeslow-movingcurrents.

B.Before1965,theconceptofscientistsproducedonlyaroughapproximationofthetruecirculation.

C.Researchersbegantodoresearchonthedevelopedtechniquesandequipment.

D.Theseinstrumentsdisclosedanexpectedlevelofvariabilityinthedeepocean.

49.

Fromthepassageweunderstandthatconventionalplantbreedingproduced______.

A.apotato-tomatohybrid

B.newplanttechnology

C.selffertilizing

D.lessdramaticresultsthanthenewtechnology

50.

Whatcanbeinferredfromthelastparagraph?

A.SigmundFreudidentifiedtypesofanxiety.

B.Moreresearchesshouldbeconductedinphysicalaspectofanxiety.

C.SigmundFreud'sideasarewelldevelopedbythefollowers.

D.Sexdrivesandunresolvedconflictscanrelieveanxiety.

51.

Wecaninferfromthepassagethat______.

A.governmentregulatoryauthoritiesshouldparticipateinelectricfacilitysiteselectiontofurthersocialgoals

B.energyparkswillhaveasignificantinfluenceonthedemographicfeaturesoftheAmericanpopulation

C.urbangrowthintheUnitedStateswaslargelytheresultofeconomicforcesratherthanconscientiousplanning

D.Americaneedslargerpower-productionfacilitiesinurbanandruralareastomeettheincreasingdemandforenergy.

52.

Whatshouldbeconsideredinmedicalstudents'education?

A.Teachersshouldgivemoretolerancetostudents.

B.Students'senseofprivacyshouldbeestablishedfirst.

C.Moreprofessionaleducationshouldbeincludedinstudents'curricula

D.Teachersshouldbesensitivetostudents'culture.

53.

WhatkindofmeasuresisbeingtakenbybanksalongAtlantic?

54.

TheRomanEmperorchangedtheform.ofOlympicGamesfromsportseventsto______.

55.

WhichofthefollowingwouldJoyceCarolOatesbemostlikelytowrite?

A.Astorywithanunhappye