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1、专题8阅读填空【2017·北京卷】第二节(共5小题;每小题2分,共10分)根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Everyanimalsleeps,butthereasonforthishasremainedfoggy.Whenlabratsarenotallowedtosleep,theydiewithinamonth.71Oneideaisthatsleephelpsusstrengthennewmemories.72Weknowthat,whileawake,freshmemoriesarerecordedbyreinforcing
2、(加强)connectionsbetweenbraincells,butthememoryprocessesthattakeplacewhilewesleephavebeenunclear.Supportisgrowingforatheorythatsleepevolvedsothatconnectionsbetweenneurons(神经元)inthebraincanbeweakenedovernight,makingroomforfreshmemoriestoformthenextday.73Nowwehavethemostdirectevidenceyetthatheisrigh
3、t.74Thesynapsesinthemicetakenattheendofaperiodofsleepwere18percentsmallerthanthosetakenbeforesleep,showingthattheconnectionsbetweenneuronsweakenwhilesleeping.IfTononi’stheoryisright,itwouldexplainwhy,whenwemissanight`s,wefinditharderthenextdaytoconcentrateandlearnnewinformation—ourbrainsmayhaves
4、mallerroomfornewexperiences.Theirresearchalsosuggestshowwemaybuildlastingmemoriesovertimeeventhoughthesynapsesbecomethinner.Theteamdiscoveredthatsomesynapsesseemtobeprotectedandstayedthesamesize.75“Youkeepwhatmatters,”Tononisays.A.Weshouldalsotrytosleepwellthenightbefore.B.It’sasifthebrainispres
5、ervingitsmostimportantmemories.C.Similarly,whenpeoplegoforafewdayswithoutsleeping,theygetsick.D.Theprocessestakeplacetostopourbrainsbecomingloadedwithmemories.E.That’swhystudentsdobetterintestsiftheygetachancetosleepafterlearning.F.“Sleepisthepricewepayforlearning,”saysGiulioTononi,whodevelopedt
6、heidea.G.Tononi’steammeasuredthesizeoftheseconnections,orsynapses,inthebrainsof12mice.【答案】71C72E73F74G75B【解析】非常感谢上级领导对我的信任,这次安排我向股份公司述职,既是对我履行职责的监督,也是对我个人的关心和爱护,更是对**百联东方商厦有限公司工作的高度重视和支持。73.根据下文中的he,可知此处要提到一个人,以及他的理论,正好F项中有,故选F。74.根据下文中提到的关键词synapsesinthemice以及整个句子可知,他肯定做了关于老鼠的实验,G项有关键词synapses,
7、mice,都与他的实验有关,故答案为G。75.根据后一句提到的Youkeepwhatmatters,你记住重要的东西,可知大脑会把最重要的记忆保存下来,前后逻辑关系顺畅,故选B。【名师点睛】 1、先看选项。跟完形填空不一样,七选五的答案选项较少,并且给出的都是句子,因此,我们可以通过句子的完整性或者句子后面的标点符号来判断该句在文章中的位置。另外,通过阅读选项,有可能找出跟其他选项表达完全不同意思的句子,这样的话我们就可以直接将该选项排除。 2