题目内容：
根据以下材料，回答题 ABadIdea
Thinkyoucanwalk,drive,takephonecalls,e-mailandlistentomusicatthesametime?Well,NewYork'snewlawsaysyoucan't．（46）Thelawwentintoforcelastmonth,followingresearchandashockingnumberofaccidentsthatinvolvedpeopleusingelectronicgadgets(机械装置)whencrossingthestreet.
Who'stoblame?（47）"Weareundertheimpressionthatourbraincandomorethanit
oftencan,"saysReneMarois,aneuroscientist(神经科学家)inTennessee．"Butacorelimitationistheinabilitytoconcentrateontwothingsatonce".
Theyoungpeopleareoftenconsideredthegreatmulti-taskers．（48）Agroupof18-to21-year-oldsandagroupof35-to39-year-oldsweregiven90secondstotranslateimagesintonumbers,usingasimplecode．（49）Butwhenbothgroupswereinterruptedbyaphonecalloraninstantmessage,theoldergroupmatchedtheyoungergroupinspeedandaccuracy.
Itisdifficulttomeasuretheproductivitylostbymulti-taskers．Butitisprobablyalot．JonathanSpire,chiefanalystatBasex,abusiness-researchfirm,estimatesthecostofinterruptionstotheAmericaneconomyatnearly$650billionayear．（50）Thesurveysconcludethat28percentoftheworkers'timewasspentoninterruptionsandrecoverytimebeforetheyreturnedtotheirmaintasks.
回答(46)题 A．Andyou'llbefined$100ifyoudosoonaNewYorkCitystreet.
B．Talkingonacell-phonewhiledrivingbringsyoujoyanyway.
C．Theestimateisbasedonsurveyswithofficeworkers.
D．Theyoungergroupdid10percentbetterwhennotinterrupted.
E．However,OxfordUniversityresearchsuggeststhisperceptionisopentoquestion.
F．Scientistssaythatourmulti-tasking(多任务处理)abilitiesarelimited.
参考答案：
答案解析：