北京地区成人本科学士学位英语考试Word格式文档下载.docx

北京地区成人本科学士学位英语考试Word格式文档下载.docx

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北京地区成人本科学士学位英语考试

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北京地区成人本科学士学位英语统一考试

2011年05月07日

PartIReadingComprehension（30%）

Directions:

Therearethreepassagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.YoushoulddecideonthebestchoiceandblackenthecorrespondingletterontheAnswerSheet。

Passage1

QuestionsIto5arebasedonthefollowingpassage:

Spending50minuteswithacellphoneclosetoyourearisenoughtochangebraincellactivityinthepartofthebrainclosesttotheantenna（天线）.Butwhetherthatcausesanyharmisnotclear,scientistsattheNationalInstituteofHealthsaidataconferencelastmonth,addingthatthestudywillnotlikelysettleconcernsofalinkbetweencellphonesandbraincancer.“Whatweshowedisglucose（葡萄糖）metabolism（代谢）（asignofbrainactivity）increasesinthebraininpeoplewhowereexposedtoacellphoneintheareaclosesttotheantenna,”saidDr.NoraVolkowoftheNIH,whosestudywaspublishedintheJournaloftheAmericanMedicalAssociation.（76）Thestudywasmeanttoexaminehowthebrainreactstoelectromagneticfieldscausedbywirelessphonesignals。

Volkowsaidshewassurprisedthattheweakelectromagneticradiation（电磁辐射）fromcellphonescouldaffectbrainactivity,butshesaidthefindingsdonotshedanylightonwhethercellphonescausecancer.“Thisstudydoesnotinanywayindicatethat.Whatthestudydoesistoshowthehumanbrainissensitivetoelectromagneticradiationfromcellphoneexposures。

”Useofthedeviceshasincreaseddramaticallysincetheywereintroducedintheearly1980s,withabout5billioncellphonesnowinuseworldwide。

Somestudieshavelinkedcellphoneexposuretoanincreasedriskofbraincancers,butalargestudybutheWorldHealthOrganizationdidnotofferaclearanswertothis.Volkow’steamstudied47peoplewhohadtheirbrainexaminedwhileacellphonewasturnedonfor50minutesandanotherwhilethephonewasturnedoff.Whiletherewasnocompletechangeinbrainmetabolism,theyfounda7percentincreaseinbrainmetabolismintheregionclosesttothecellphoneantennawhenthephonewason。

（77）Expertssaidtheresultswereinteresting,buturgedthattheybeunderstoodwithgreatcare.“Althoughthebiologicalsignificance,ifany,ofincreasedglucosemetabolismfromtoomuchcellphoneexposureisunknown,theresultsrequirefurtherinvestigation,”HenryLaioftheUniversityofWashingtonintheU.S.andDr.LennartHardellofUniversityHospitalinSweden,wroteinanarticleinJAMA.“Muchhastobedonetofurtherinvestigateandunderstandtheseeffects。

”Theywrote。

1.Accordingtothepassage,whichofthefollowingisTRUE?

A.Cellphoneuseisdangerous。

B.Cellphoneusecausescancer。

C.Thehumanbrainisanelectromagneticfield。

D.Thereareabout5billioncellphoneusersintheworldrightnow。

2.DoctorVolkowwasastonishedbecause______。

A.herresearchhasshedlightonherunderstandingofcellphone

B.shefoundthatcellphoneexposureisharmfultohumanbrain

C.shefoundthatusingacellphoneforabout50minutescouldinfluenceorchangebrainactivity

D.humanbrainisnotresponsivetoelectromagneticradiation

3.Accordingtothepassage,cellphoneswerelaunched_______。

A.inthelate1970sB.between1980and1985

B.inthelate1980sD.intheearly1990s

4.Whatdoestheword“that”standforinthesecondparagraph?

A.Brainactivity。

B.Herresearchfindings。

C.Thefactthatcellphoneusemaycausecancer。

D.Herresearchprogress。

5.Whichofthefollowingisanappropriatetitleforthispassage?

A.CellPhoneRadiation:

IsItHarmful?

B.CellPhoneRadiati0n:

IsItUseful?

C.CellPhoneRadiation:

IsItHealthy?

D.CellPhoneRadiation:

IsItWeak?

Passage2

Questions6to10arebasedonthefollowingpassage:

Humanbeingshavealwayshadanabilitytoattendtoseveralthingsatonce.（78）Noriselectronicmultitaskingentirelynew:

We’vebeendrivingwhilelisteningtocarradiossincetheybecamepopularinthe1930s.butthereisnodoubtthatmultitaskinghasreachedakindofwarpspeedintheeraofWeb-enabledcomputers,whenithasbecomeroutinetoconductseveralIM（及时通讯）conversations,watchTVandusethecomputerallatonce。

Butwhat’stheimpactofthismediaconsumption?

Andhowarethesemultitaskingdeviceschanginghowkidslearn,reasonandcommunicatewithoneanother?

Socialscientistsandeducatorsarejustbeginningtodealwiththesequestions,buttheresearchersalreadyhavesomestrongopinions。

（79）Althoughmultitaskingkidsmaybebetterpreparedinsomewaysfortoday’sfast-pacedworkplaced,Man