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1、专题八《七选五说明类专练》考试范围：XXX；考试吋间：100分钟；命题人：XXX学校：姓名：班级：考号：题号—•二总分得分注意事项：1、答题前填写好自己的姓名、班级、考号等信息2、请将答案正确填写在答题卡上评卷人得分一.七选五1、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.①Oneide
2、aisthatsleephelpsusstrengthennewmemories・②Weknowthat,whileawake,freshmemoriesarerecordedbyreinforeing（力II强）cormectionsbetweenbraincel1s,butthememoryprocessesthattakeplacewhilewesleephavebeenunclear.Supportisgrowingforatheorythatsleepevolvedsothatcormectionsbetweennourons
3、（神经元）inthebraincanbeweakonedovernight,makingroomforfreshmemoriestofromthenextday.③Nowwehavethemostdirectevidenceyetthatheisright.④Thesynapsesinthemicetakenattheendofaperiodofsleepwere18percentsmallerthanthosetakenbeforesleep,showingthatthecormectionsbetweenneuronsweakonw
4、hilesleeping・IfTononi"stheoryisright,itwouldexplainwhy,whenwemissanight"s,wefinditharderthenextdaytoconcentrateand1earnnewinformation-ourbrainsmayhavesmallerroomfornewexperences-Theirresearchalsosuggestshowwemaybuildlastingmemoriesovertimeeventhoughthesynapsesbecomethinn
5、er.Theteamdiscoveredthatsomesynapsesseemtobeprotectedandstayedthesamesize・⑤"Youkeepwhatmatters,”Tononisays.A.Weshouldalsotrytosleepwel1thenightbefore.B・It'sasifthebrainispreservingitsmostimportantmemories.C.Similarly,whonpeoplegoforafewdayswithoutsleeping,theygetsick・D.T
6、heprocessestakeplacetostopourbrainsbecomingloadedwithmemories.D.That'swhystudentsdobetterintestsiftheygetachancetosleepafterlearning.E."Sleepisthepricewepayforlearning,”saysGiulioTononi,whodevelopedtheidea.F.Tononi'steammeasuredthesizeofthesecormections,orsynapses,intheb
7、rainsof12mice.2、HowtoDoMan-on-the-StreetInterviewsTheman-on-the-streetinterviewisaninterviewinwhichareporterhitsthestreetswithacameramantointerviewpeopleonthesport.①Butwiththesetips,yourfirstman-on-the-streetinterviewexperiencecanbeeasy.•Whenyourbossorprofessorsendsyouou
8、ttodoman-on-thc-streetinterviewsforastory,thinkaboutthetopicanddevelopalistofabouttengeneralquestionsre
