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1、GrammarandVocabulary(A)Sincethe1970s,scientistshavebeensearchingforwaystolinkthebrain_________computers.Braincomputerinterfacetechnologycouldhelppeoplewithdisabilitiessendcommandstomachines.Recently,tworesearchers,JoseMillanandMicheleTavellafromtheFederalPolytechnicSc
2、hoolinLausanne,Switzerland,__________(demonstrate)asmallroboticwheelchairdirectedby________person’sthoughts.Inthelaboratory,Tavellaoperatedthewheelchairjustbythinkingaboutmovinghisleftorrighthand.He__________eventalkashewatchedthevehicleandguideditwithhisthoughts.“Our
3、brainhasbillionsofnervecells.Thesesendsignalsthroughthespinalcoedtothemusclestogiveustheability__________(move).Butspinalcordinjuriesorotherconditionscanpreventtheseweakelectricalsignalsfromreachingthemuscles.”Tavellasays.“Oursystemallowsdisabledpeopletocommunicatewit
4、hexternalworldandalso_________(control)devices.”Prof.Millan,theteamleader,saysscientistskeepimprovingthecomputersoftwarethatinterpretsbrainsignalsandturnsthemintosimplecommands.“ThepracticalpossibilitiesthatBCItechnologyofferstodisabledpeoplecan_________(group)intwoca
5、tegories:communication,andcontrollingdevices.Oneexampleisthiswheelchair.”Hesayshisteamhassettwogoals.Oneistestingwithrealpatients,soas_______(prove)thatthisisatechnologytheycanbenefitfrom.And_________otheristoguaranteethattheycanusethetechnologyoverlongperiodsoftime.(
6、B)AFrenchtouristhighlypraisedforrescuingatwo-year-oldgirlinManhattan________(say)hedidn’tthinktwice__________divingintothefreezingEastRiver.Tuesday’sDailyNewssaid29-year-oldJulienDuretfromFranceisthemanwholeftthespotquicklyaftertherescuelastSaturday.Heliftedthelittleg
7、irloutofthewateraftershefell________thebankattheSouthStreetSeaportmuseum.Hehandedthegirltoherfather,DavidAnderson,whohaddivedinafterhim.“Ididn’tthinkatall.”DurettoldtheDailyNews.“Ithappenedveryfast.Ireactedveryfast.”Duret,anengineeronvacation,_________(walk)withhisgir
8、lfriendalongthepierwhenhesawsomething__________(fall)intothewater.Hethoughtitwasadoll,butrealizeditwasachild__________heappr