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1、2001年1月大學英語六級(CET6)真題試卷PassageOneQuestions11to15arebasedonthefollowingpassage.Birdsthatareliterallyhalfasleep—withonebrainhemispherealerttheothersleeping—controlwhichsideofthebrainremainsawakeaccdingtoanewstudyofsleeping
2、ducks.Earlierstudieshavedocumentedhalfbrainsleepinawiderangeofbirds.Thebrainhemispherestaketurnssinkingintothesleepstageacterizedbyslowbrainwaves.Theeyecontrolledbythesleepinghemispherekeepsshutwhilethewakefulhemisphere’
3、seyestaysopenalert.Birdsalsocansleepwithbothhemispheresrestingatonce.Decadesofstudiesofbirdflocksledresearcherstopredictextraalertnessinthemevulnerableendoftherowsleepers.Sureenoughtheendbirdstendedtowatchcarefullyonthes
4、ideawayfromtheircompanions.Ducksintheinnerspotsshowednopreferencefgazedirection.Alsobirdsdozing(打盹)attheendofthelinerestedtosinglehemispheresleepratherthantotalrelaxationmeoftenthaninnerducksdid.Rotating16birdsthroughthe
5、positionsinafourduckrowtheresearchersfoundouterbirdshalfasleepduringsome32percentofdozingtimeversusabout12percentfbirdsininternalspots.“Webelievethisisthefirstevidencefananimalbehaviallycontrollingsleepwakefulnesssimulta
6、neouslyindifferentregionsofthebrain”theresearcherssay.Theresultsprovidethebestevidencefalongstingsuppositionthatsinglehemispheresleepevolvedascreaturesscannedfenemies.Thepreferencefopeninganeyeonthelookoutsidecouldbewide
7、spreadhepredicts.He’sseenitinapairofbirdsdozingsidebysideinthezooinasinglepetbirdsleepingbyamirr.Themirrsideeyeclosedasifthereflectionwereacompaniontheothereyestayedopen.Usefulashalfsleepingmightbeit’sonlybeenfoundinbird
8、ssuchwatermammals(哺乳動物)asdolphinswhalesseals.Perhapskeepingonesideofthebrainawakeallowsasleepinganimaltosurfaceoccasionallytoavoiddrowning.Studiesofbirdsmayofferuniqueinsightsintosleep.JeromeM.SiegeloftheUCLAsayshewonder
9、sifbirds’halfbrainsleep“isjustthetipoftheiceberg(冰山)”Hespeculatesthatmeexamplesmayturnupwhenwetakeacloserlookatotherspecies.11.Anewstudyonbirds’sleephasrevealedthat________.Emily’stestshowsthattheseenergyfieldscan’tbedet
10、ectedevenbytrainedTTpractitioners(行醫(yī)者).ObviouslymindfulofthepublicityvalueofthesituationJournaleditGegeLundbergappearedonTVtodeclare“Agedoesn’tmatter.It’sgoodsciencethatmattersthisisgoodscience.”Emily’smotherLindaRosaare
11、gisterednursehasbeencampaigningagainstTTfnearlyadecade.LindafirstthoughtaboutTTinthelate‘80swhenshelearneditwasontheapprovedlistfcontinuingnursingeducationinColado.Its100000trainedpractitioners(48000intheU.S.)don’tevento
12、uchtheirpatients.Insteadtheywavedtheirhsafewinchesfromthepatient’sbodypushingenergyfieldsarounduntilthey’rein“balance.”TTadvocatessaythesemanipulationscanhelphealwoundsrelievePainreducefever.Theclaimsaretakenseriouslyeno
13、ughthatTTtherapistsarefrequentlyhiredbyleadinghospitalsatupto$70anhourtosmoothpatients’energysometimesduringsurgery.YetRosacouldnotfindanyevidencethatitwks.ToprovidesuchproofTTtherapistswouldhavetositdownfindependenttest
14、ing—somethingtheyhaven’tbeeneagertodoeventhoughJamesRihasofferedmethan$1milliontoanyonewhocandemonstratetheexistenceofahumanenergyfield.(He’shadonetakersofar.Shefailed.)AskepticmightconcludethatTTpractitionersareafraidto
15、laytheirbeliefsontheline.ButwhocouldturndownaninnocentfourthgraderSaysEmily:“Ithinktheydidn’ttakemeveryseriouslybecauseI’makid.”Theexperimentwasstraightfward:21TTtherapistsstucktheirhspalmsupthroughascreen.Emilyheldherow
16、nhoveroneoftheirsleftrightthepractitionershadtosaywhichhitwas.Whentheresultswererecdedthey’ddonenobetterthantheywouldhavebysimplyguessing.Iftherewasanenergyfieldtheycouldn’tfeelit.16.WhichofthefollowingisevidencethatTTis
17、widelypracticedA)TThasbeeninexistencefdecades.B)Manypatientswerecuredbytherapeutictouch.C)TTtherapistsareoftenemployedbyleadinghospitals.D)Methan100000peopleareundergoingTTtreatment.17.VeryfewTTpractitionersrespondedtoth
18、e$1millionofferbecause________.A)theydidn’ttaketheofferseriouslyB)theydidn’twanttorisktheircareerC)theywereunwillingtorevealtheirsecretD)theythoughtitwasnotinlinewiththeirpractice18.ThepurposeofEmilyRosa’sexperimentwas__
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