Passage1 AconceptcardevelopedbyJapanesecompanyNissanhasabreathalyzer-likedetectionsystemandotherinstrumentsthatcouldhelpkeepdrunkorovertireddriversofftheroad. Thecar'ssensorscheckodorsinsidethecarandmonitoradriver'ssweatfortracesofalcohol.Anin-carcomputersystemcanissueanalertorevenlockuptheignitionsystemifthedriverseemsover-the-limit.Theairodorsensorsarefixed'firmlyanddeeplyinthedriverandpassengerseats,whileadetectorinthegear-shiftknobmeasuresperspirationfromthedriver'spalm. Othercarmakershavedevelopedsimilardetectionsystems.Forexample,Sweden'sVolvohasdevelopedabreathalyzerattachedtoacar'sseatbeltthatdriversmustblowintobeforetheenginewillstart. Nissan'snewconceptvehiclealsoincludesadashboard-mountedcamerathattracksadriver'salertnessbymonitoringtheireyes.ItwillsoundanalarmandissueaspokenwarninginJapaneseorEnglishifitjudgesthatthedriverneedstopulloverandrest. Thecartechnologyisstillindevelopment,butgeneralmanagerKazuhiroDoisaysthecombinationofdifferentdetectionsystemsshouldimprovetheoveralleffectivenessofthetechnology."Forexample,ifthegear-shiftsensorwasbypassedbyapassengerusingitinsteadofthedriver,thefacialrecognitionsystemwouldstillbeused,"Doisays.Nissanhasnospecifictimetableformarketingthesystem,butaimstousetechnologytocutthenumberoffatalitiesinvolvingitsvehiclestohalf1995levelsby2015. Thecar'sseatbeltcanalsotightenifdrowsinessisdetected,whileanexternalcamerachecksthatthecariskeepingtoitslaneproperly.However,Doiadmitsthatsomeofthetechnology,suchasthealcoholodorsensor,shouldbeimproved."Ifyoudrinkonebeer,it'sgoingtoregister,soweneedtostudywhat'stheappropriatelevelforthesystemtoactivate,"hesays. IntheUK,someresearchgroupsareusingsimilaradvancedtechniquestounderstanddriverbehaviorandtheeffectivenessofdifferentroaddesigns. WhatisthefunctionofthecameramentionedinParagraph4?
A.It monitors the driver's eyes to see if he needs a rest.
B.It judges if the driver wants to pull over.
C.It judges if the driver wants to take a rest.
D.It issues an alarm when the driver speaks.
正确答案是A