2014届高考英语一轮复习 unit22 指导课时作业b卷（含解析） 北师大版

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1、Unit22B卷一、阅读理解AAgoodnight’ssleepmayhelpyourbrainfileawaylessonslearnedduringtheday.But，accordingtoanewstudy，thebrainbeginsprocessingandstoringthosememorieslongbeforeit’stimeforbedandcontinuestodosoevenwhileyou’rethinkingaboutanddoingotherthings.Recentstudieshaveshown

2、thatthepartsofthebrainthatweusetolearnataskbecomeactiveagainduringsleep.Thisactivity，scientistssuggest，couldbethebraintransferringmemoriesfromshorttermtolongtermstorage.Butthebraindoesn’tnecessarilywaituntilthelightsareouttobeginprocessingthosememories.Tofindouthowth

3、ebrainhandlesmemoriesduringwakinghours，scientistsgave15volunteerstwotasks，eachrequiringdifferentpartsofthebraintolearn.Inonetask，thesubjectslearnedhowtodriveinavirtual(虚拟的)townandthensearchedthetownforanobject.Inthesecondtask，theylearnedtopredictwhereaseriesofdotswou

4、ldappearonascreen.Usingaspecialmachine，theresearchersscannedthevolunteers’brainsrightbeforeandrightafterthetasks.Theycomparedthetwoimagestoseewhethertheregionsofthebraininvolvedinlearningthetaskwerestillactiveevenafterthetaskwascompleted.Afterabreak，thescientiststook

5、athirdimageofeachparticipant’sbrain.Theywantedtodeterminewhethertheseregionsinthebraincontinuedtobeactiveaftermoretimehadpassedandtheydiscoveredthat，foratleastanhourafteralearningtask，thebrainstayedactive.Itappearedtocontinueprocessingthenewinformation.Furthermore，th

6、eimagesshowedthatdistractingthesubjectsdoesn’taffecttheirabilitytostorememories.Theprocessingcontinuesevenwhenthey’rethinkingaboutordoingotherthings.Somescientistssaythiscouldmeanthatsleepisn’tessentialforstoringmemories.Othersdisagree.Untilthat’ssettled，it’sprobably

7、stillbettertobeonthesafeside，gettingplentyofsleep.1．Thefactthatthepartsofthebrainthatweusetolearnataskbecomeactiveagainduringsleepmaysuggest______.6A．wearedreamingadreamaboutthelessonswelearnedinthedaytimeB．wecan’thaveagoodsleepifweworktoohardbeforegoingtobedC．thebra

8、instaysactiveevenwhenweareindeepsleepatnightD．thebrainistransferringmemoriesfromshorttermtolongtermstorage2．Thescientiststookathird