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1、巧解阅读填空一、2012年真题解析Sincetheearliestcivilizations,peoplehavecontrolledriverstomeetsociety'sdemands.Today,riversarecontrolledformanyreasons,primarilytomaintainreliablewatersuppliesfordaily,agriculturalandindustrialneeds,forpowergeneration,fornavigation（血i彳亍），andtopreventflooding・Rivercontrolisachiev
2、edbychannelization,atermthatcoversarangeofriverengineeringworks,includingwidening,deepening,straighteningandstabilizationofbanks,andbytheconstructionofdams.AnimportantperiodofchannelizationtookplaceinEuropeduringthe19thcentury,whenmanylargeriverswerestraightenedandtheirbedsdeepened.Oneofthemostd
3、ramaticallychangedwastheTiszaRiver,abranchoftheDanubethatflowsthroughHungary.ThecontrollingoftheTisza,designedtoreducefloodingandmakelandforagriculture,includedcuttingoffmorethan100meanders（M曲）,shorteningtherivefslengthbynearly400kilometers・Oneofthemostcommonwaysinwhichpeoplecontrolriversisbydam
4、mingthem・Thepast50yearsorsohasseenanincreaseindamconstructionworldwide,andatthebeginningofthe21stcentury,therewereabout800,000damsglobally,sometoweringmorethan200metersinheight.Despitetheirsuccesses,manydamsalsocausesignificantenvironmentalchangesthatproveharmful.Someparticularlydeepreservoirs（z
5、K库）canbringaboutearthquakesduetothestressontheirbottomrockscausedbyhugevolumesofwaterDownstreamofareservoir,theriveriscertainlyinfluencedinmanyways:watervolume,speedandqualityareallaffected,leadingtochangesinthelandscapeandamongplantsandanimals.Title:71to73adequatewaterfor:•dailylife,74andindust
6、ry•powergeneration•navigation<.tostopriversfrom75_channelization:•engineeringworks:•widening,76andstraighteningrivers•77riverbanks•anexample:the78oftheTiszabynearly400km79:•achievements:800,00（）damsbuilt•problems:causingharmfulchangesto8（）解析:本文是-•篇说明文，介绍了控制河水的原因和方法。结构清晰，层层递进，逻辑性强,一目了然。请好好观察体会上面框
7、架图是如何构成和层层递进的。71.此题要求写出标题，属于信息归纳题。此题可根据peoplehavecontrolledrivers..../riversarecontrolled.../Rivercontrolisachieved…来作答。可以给出Peoplecontrolrivers/Peoplecontrollingrivers或Riversarecontrolled/Riversbeingcontrolled或Rivercontrolo到
