2012六级英语模拟卷5(有答案)

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1、2012六级英语模拟卷5(有答案)：spark英语　　PartⅡReadingComprehension(35minutes)　　Directions:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).Youshoulddecideonthebestchoiceandmarktheco

2、rrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.　　PassageOne　　Questions21to25arebasedonthefollowingpassage.　　OnepertinentquestioninthewakeoftheearthquakenearAceh(亚齐省)andthetsunami(海啸)itgeneratedishowmuchnoticeofanapproachingwavecanbegivento

3、vulnerablepeoplewithouttheriskofcrying“wolf”toooften.Earthquakesthemselvesareunpredictable,andlikelytoremainso.Butdetectingthemwhentheyhappenisaroutinetechnology.Thatwasnottheprobleminthiscase,whichwasobservedbymonitoringstationsallovertheworld.Unfortunatel

4、yfortheforecasters,althoughanypowerfulsubmarineearthquakebringstheriskofadangeroustsunami,notallsuchearthquakesactuallyresultinabigwave,andfalsealarmscostmoneyandbreedcynicism.　　Ontopofthat,most“tsunamigenic”earthquakes,whicharecausedwhentheprocessesofplate

5、tectonicsforceheavy,oceaniccrustalrockbelowlighter,continentalrocktocreateadeeptrenchatthebottomofthesea,occurinthePacific,whichisalmostsurroundedbysuchtrenches.IntheIndianOcean,deeptrenchesareconfinedtothesoutherncoastofIndonesia,andtsunamisarerare.Sincemo

6、stofthecountriesaffectedbythistsunamiarepoor,ormiddleincomeatbest,andmonitoringcostsmoney,thismightsuggestthatafatalisticapproachtothequestionisreasonable.ButAmericanandJapaneseexperiencesuggeststhateffectivemonitoringneednotbethatexpensive.　　Thesetwocount

7、rieshavenetworksofseabedpressuredetectorsthatcanmonitortsunamisandindicatewhetherandwhereevacuationisnecessarydatatheysharewiththeirPacificneighbours.Asystemofsevendetectors,runfromHawaii,costabout$18mtodevelop,andtheexperiencegaineddoingsomeansasimilarsy

8、stemmightnowbehadforaslittleas$2m.So,tothesoundofstabledoorsbeingboltedfirmlyshut,politiciansinSouthEastAsiaandAustraliaareproposingonefortheIndianOcean.　　Evenifyouhaveaneffectivedetectionsystem,thoug