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. AccordingtoDoi,__________.
A.the overall effectiveness of the detection technology has improved
B.Nissan is making a timetable to market the detection system
C.it is impossible to improve the'overall effectiveness of the detection system
D.Nissan aims to improve the detection technology to reduce the fatality rate
正确答案是D