阅读理解。Sincethe1970sscientistshavebeensearchingforwaystolinkthebrainwithcomputers.Brain-computerinterface(界面)(BCI)technologycouldhelppeoplewithdisabilitiessendcommandstomachines.Recentlytw

　　阅读理解。

　　Sincethe1970sscientistshavebeensearchingforwaystolinkthebrainwithcomputers.

　　Brain-computerinterface(界面)(BCI)technologycouldhelppeoplewithdisabilitiessendcommands

　　tomachines.

　　RecentlytworesearchersJoseMilanandMicheleTavellafromtheFederalPolytechnicschoolin

　　LausanneSwitzerlanddemonstrated(展示)asmallroboticwheelchairdirectedbyaperson'sthoughts.

　　InthelaboratoryTavellaoperatedthewheelchairjustbythinkingaboutmovinghisleftorrighthand.

　　Hecouldeventalkashewatchedthevehicleandguideditwithhisthoughts.

　　"Ourbrainhasbillionsofnervecells.Thesesendsignalsthroughthespinalcord(脊髓)tothemuscles

　　togiveustheabilitytomove.Butspinalcordinjuriesorotherconditionscanpreventtheseweakelectricalsignalsfromreachingthemuscles"Tavellasays. "Oursystemallowsdisabledpeopletocommunicate

　　withexternalworldandalsotocontroldevices."

　　Theresearchersdesignedaspecialcapfortheuser.Thisheadcoverpicksupthesignalsfromthe

　　scalp(头皮)andsendsthemtoacomputer.Thecomputerinterpretsthesignalsandcommandsthe

　　motorizedwheelchair.Thewheelchairalsohastwocamerasthatidentifyobjectsinitspath.Theyhelp

　　thecomputerreacttocommandsfromthebrain.

　　Prof.Milantheteamleadersaysscientistskeepimprovingthecomputersoftwarethatinterprets

　　brainsignalsandturnsthemintosimplecommands."ThepracticalpossibilitiesthatBCItechnologyoffers

　　todisabledpeoplecanbegroupedintwocategories:communicationandcontrollingdevices.One

　　exampleisthiswheelchair."

　　Hesayshisteamhassettwogoals.Oneistestingwithrealpatientssoastoprovethatthisisa

　　technologytheycanbenefitfrom.Andtheotheristoguaranteethattheycanusethetechnologyover

　　longperiodsoftime.

　　1.BCIisatechnologythatcan_______.

　　A.helptoupdatecomputersystems

　　B.linkthehumanbrainwithcomputers

　　C.helpthedisabledtorecover

　　D.controlaperson'sthoughts