大学英语cet-6历年真题训练【阅读理解】[权威资料]

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1、大学英语CET-6历年真题训练【阅读理解】本文档格式为WORD,感谢你的阅读。最新最全的学术论文期刊文献年终总结年终报告工作总结个人总结述职报告实习报告单位总结演讲稿大学英语CET-6历年真题训练【阅读理解】　　不知道自己无知，乃是双倍的无知。以下是搜索整理的大学英语CET-6历年真题训练【阅读理解】，希望能给大家带来帮助!想了解更多精彩内容请及时关注我们!　　Unit5　　PartⅡReadingComprehension　　(35minutes)　　Directions:Thereare4readingpassagesinthispart.E

2、achpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.　　PassageOne　　Questions21to25arebasedonthefollowingpassage:

3、　　Therearedesertplantswhichsurvivethedryseasonintheformofinactiveseeds.Therearealsodesertinsectswhichsurviveasinactivelarvae(幼虫).Inaddition,difficultasitistobelieve,therearedesertfishwhichcansurvivethroughyearsofdrought(干旱)intheformofinactiveeggs.Thesearetheshrimps(小虾)thatliv

4、eintheMojaveDesert,anintenselydryregioninthesouth-westoftheUnitedStateswhereshadetemperaturesofover50℃areoftenrecorded.?　　TheeggsoftheMojaveshrimpsarethesizeandhavetheappearanceofgrainsofsand.Whensufficientspringrainfallstoformalake,onceeverytwotofiveyears,theseeggshatch(孵化).

5、Thenthewaterissoonfilledwithmillionsoftinyshrimpsaboutamillimetrelongwhichfeedontinyplantandanimalorganismswhichalsogrowinthetemporarydesertlake.Withinaweek,theshrimpsgrowfromtheiroriginal1millimetretoalengthofabout1.5centimetres.　　Throughoutthetimethattheshrimpsarerapidlymat

6、uring,thewaterinthelakeequallyrapidlyevaporates.Therefore,fortheshrimpsitisaraceagainsttime.Bythetwelfthday,however,whentheyareabout3centimetrelong,hundredsoftinyeggsformontheunderbodiesofthefemales.Usuallybythistime,allthatremainsofthelakeisalarge,muddypatchofwetsoil.Ontheth

7、irteenthdayandthenext,duringthefinalhoursoftheirbrieflives,theshrimpslaytheireggsinthemud.Then,havingensuredthattheirspecieswillsurvive,theshrimpsdieasthelastofthewaterevaporates.　　Ifsufficientrainfallsthenextyeartoformanotherlake,theeggshatch,andonceagaintheshrimpspassrapidl

8、ythroughtheircycleofgrowth,adulthood,egg-laying,anddeath.Someyearsth