题目内容
11These are the motives for doing it
A reasons B excuses
C answers D replies
查看答案
搜索结果不匹配？点我反馈
更多问题
10 Jack packed up all the things he had accumulated over the last ten years
A future B far
C near D past
下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。
ABadIdea
Thinkyoucanwalk,drive,takephonecalls,e-mailandlistentomusicatthesametime？Well,NewYork'snewlawsaysyoucan't. (46)Thelawwentintoforcelastmonth,followingresearchandashockingnumberofaccidentsthatinvolvedpeopleusingelectronicgadgets(小巧机械)whencrossingthestreet.
Who'stoblame？ (47)"Weareundertheimpressionthatourbraincandomorethanitoftencan,"saysReneMarois,aneuroscientist(神经科学家)inTennessee."Butacorelimitationistheinabilitytoconcentrateontwothingsatonce."
Theyoungpeopleareoftenconsideredthegreatmulti-taskers. (48)Agroupof18-to21-year-oldsandagroupof35-to39-year-oldsweregiven90secondstotranslateimagesintonumbers,usingasamplecode. (49)Butwhenbothgroupswereinterruptedbyaphonecalloraninstantmessage,theoldergroupmatchedtheyoungergroupinspeedandaccuracy.
Itisdifficulttomeasuretheproductivitylostbymulti-taskers.ButitisprobablyalotJonathanSpira,chiefanalystatBasex,abusiness-researchfirm,estimatesthecostofinterruptionstotheAmericaneconomyatnearly$650billionayear. (50)Thesurveysconcludethat28percentoftheworkers'timewasspentoninterruptionsandrecoverytimebeforetheyreturnedtotheirmaintasks.
A Andyou'llbefined$100ifyoudosoonaNewYorkCitystreet
B Talkingonacellphonewhiledrivingbringsyoujoyanyway
C Theestimateisbasedonsurveyswithofficeworkers
D Theyoungergroupdid10percentbetterwhennotinterrupted
E However,anOxfordUniversityresearchsuggeststhisperceptionisopento question.
F Scientistssaythatourmultitasking(多任务处理)abilitiesarelimited.
Mary just told us a very fascinating story.
6You'd better put these documents in asafe place
A secure B dark
C guarded D banned
微信支付 
支付宝支付