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1、Unit1 Festivalsaroundtheworld过渡句题(七选五)方法指导在七选五中对过渡句的考查主要包括段落内过渡句和段落间过渡句。1)段落内过渡句:阅读空格前后相邻内容,挖掘内在逻辑关系,注意衔接词和体现逻辑关系的信号词,如therefore、thus、so、but、however、onthecontrary等,然后与选项中的关键词建立联系;2)段落间过渡句:阅读上一段的段尾和下一段的内容,注意衔接词和体现逻辑关系的信号词,然后与选项中的关键词建立联系。典例引领(2017北京)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
2、为多余选项。Everyanimalsleeps,butthereasonforthishasremainedfoggy.Whenlabratsarenotallowedtosleep,theydiewithinamonth. 1 Oneideaisthatsleephelpsusstrengthennewmemories. 2 Weknowthat,whileawake,freshmemoriesarerecordedbyreinforcing(加强)connectionsbetweenbraincells,butthememoryprocessesthatta
3、keplacewhilewesleephavebeenunclear. Supportisgrowingforatheorythatsleepevolvedsothatconnectionsbetweenneurons(神经元)inthebraincanbeweakenedovernight,makingroomforfreshmemoriestoformthenextday. 3 3Nowwehavethemostdirectevidenceyetthatheisright. 4 Thesynapsesinthemicetakenattheendofaperi
4、odofsleepwere18percentsmallerthanthosetakenbeforesleep,showingthattheconnectionsbetweenneuronsweakenwhilesleeping. IfTononi’stheoryisright,itwouldexplainwhy,whenwemissanight’ssleep,wefinditharderthenextdaytoconcentrateandlearnnewinformation—ourbrainsmayhavesmallerroomfornewexperiences
5、.Theirresearchalsosuggestshowwemaybuildlastingmemoriesovertimeeventhoughthesynapsesbecomethinner.Theteamdiscoveredthatsomesynapsesseemtobeprotectedandstayedthesamesize. 5 “Youkeepwhatmatters,”Tononisays. A.Weshouldalsotrytosleepwellthenightbefore.B.It’sasifthebrainispreservingitsmosti
6、mportantmemories.C.Similarly,whenpeoplegoforafewdayswithoutsleeping,theygetsick.D.Theprocessestakeplacetostopourbrainsbecomingloadedwithmemories.E.That’swhystudentsdobetterintestsiftheygetachancetosleepafterlearning.F.“Sleepisthepricewepayforlearning,”saysGiulioTononi,whodevelopedthei
7、dea.G.Tononi’steammeasuredthesizeoftheseconnections,orsynapses,inthebrainsof12mice.方法运用[语篇解读] 本文为说明文。研究表明,睡眠期间脑细胞之间的关联会减弱,从而使大脑为新的记忆腾出空间,但是对于重要的记忆,大脑则会对其加以保护。1.C 细节句。上句指出,当不允许实验室的老鼠睡觉时,它们在一个月之内就死去了。本句是上句的延伸,由动物转移到了人类。C项符合语境,意为“同样,人几天不睡觉的话也会生病”。2.E 细节句。上句指出睡眠有助于加强新的记忆,下文对此进行了解释。本句应该是对这
8、个观点的回
