北京地区成人本科学士学位英语统一考试2011.5.doc
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北京地区成人本科学士学位英语统一考试2011.5.doc
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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
PartI ReadingComprehension(30%)
Directions:
Therearethreepassagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.YoushoulddecideonthebestchoiceandblackenthecorrespondingletterontheAnswerSheet。
Passage1
QuestionsIto5arebasedonthefollowingpassage:
Spending50minuteswithacellphoneclosetoyourearisenoughtochangebraincellactivityinthepartofthebrainclosesttotheantenna(天线).Butwhetherthatcausesanyharmisnotclear,scientistsattheNationalInstituteofHealthsaidataconferencelastmonth,addingthatthestudywillnotlikelysettleconcernsof alinkbetweencellphonesandbraincancer.“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. inthelate1970s B.between1980and1985
B. inthelate1980s D.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,Manyscienti
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