2010年12月大学英语四级考试模拟题一

听力课堂,开放式外语学习平台！TingClass.com声明：本资料由听力课堂网站收集整理，仅供英语爱好者学习使用，资料版权属于原作者。-1-2010年12月大学英语四级考试模拟题一PartIWriting（30minutes）Directions：Forthispart,youareallowed30minutestowriteacompositiononetopic:CityProblems.Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelowinChinese：1.越来越多的人涌入大城市，有些问题随之产生2.比较明显的大问题有……3.我对这种现象的想法CityProblemsPartIIReadingComprehension（SkimmingandScanning）（15minutes）Directions：Inthispart，youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,markY（forYES）ifthestatementagreeswiththeinformationgiveninthepassage;N（forNO）ifthestatementcontradictstheinformationgiveninthepassage;NG（forNOTGIVEN）iftheinformationisnotgiveninthepassage.Forquestions8-10，completethesentenceswiththeinformationgiveninthepassage.ScientistsWeighOptionsforRebuildingNewOrleansAsexpertsponderhowbesttorebuildthedevastated（毁坏）city,onequestioniswhethertowalloff—orworkwith—thewater.EvenbeforethedeathtollfromHurricaneKatrinaistallied，scientistsarecautiouslybeginningtodiscussthefutureofNewOrleans.FewseemtodoubtthatthisvitalheartofU.S.commerceandculturewillberestored，butexactlyhowtorebuildthecityanditsdefensestoavoidarepeatcatastropheisanopenquestion.PlansforimprovingitsleveesandrestoringthebarrierofwetlandsaroundNewOrleanshavebeenonthetablesince1998，butfederaldollarsneededtoimplementthemneverarrived.Afterthetragedy,that’sboundtochange,saysJohnDay,anecologistatLouisianaStateUniversity（LSU）inBatonRouge.Andifthereisanupsidetothedisaster，hesays，it’sthat‘nowwe’vegotacleanslatetostartfrom.“ManyarelookingforguidancetotheNetherlands，acountrythat，justlikebowl-shapedNewOrleans，sitsmostlybelowsealevel，keepingthewateratbaywithaconstructionofamazing听力课堂,开放式外语学习平台！TingClass.com声明：本资料由听力课堂网站收集整理，仅供英语爱好者学习使用，资料版权属于原作者。-2-scaleandcomplexity.Others，pointingtoVenice‘slong-standingadaptations，sayit’sbesttoletwaterflowthroughthecity，depositingsedimenttooffsetgeologicsubsidence—amodelthatwouldrequirearadicalrethinkingofarchitecture.Anotherideaistoletnaturehelpbyrestoringthewetlandbuffersbetweenseaandcity.Butbeforetheoptionscanbeweighed，severalunknownswillhavetobeaddressed.Oneispreciselyhowthecurrentdefensesfailed.Toanswerthat，LSUcoastalscientistsPaulKempandHassanMashriquiarepickingtheirwaythroughthedestroyedcityandsurroundingregion，reconstructingthesizeofwatersurgesbymeasuringtelltalemarksleftonthesidesofbuildingsandhighwaystructures.TheyarefeedingthesedataintoasimulationofthewindandwateraroundNewOrleansduringitsordeal.”Wecan‘tsayforsureuntilthisjobisdone，“saysDay，”buttheemergingpictureisexactlywhatwe’vepredictedforyears.“Namely，severalcanals—includingtheMRGO，whichwasbuilttospeedshippinginthe1960s—havethecombinedeffectoffunnelingsurgesfromtheGulfofMexicorighttothecity‘seasternleveesandthelakesystemtothenorth.Thosesurgesaretoblamefortheflooding.”Oneofthefirstthingswe’llseedoneisthecompletebackfillingoftheMRGOcanal，“predictsDay，”whichcouldtakeacoupleofyears.“Thelevees，whichhavebeenprovisionallyrepaired，willbeshoredupfurtherinthemonthstocome，althoughtheirlong-termfateisunclear.Betterleveeswouldprobablyhavepreventedmostofthefloodinginthecitycenter.Toprovidefurtherprotection，amobiledamsystem，muchlikeastormsurgebarrierintheNetherlands，couldbeusedtocloseoffthemouthofLakePontchartrain.Butmostexpertsagreethattheseareshort-termfixes.ThebasicproblemforNewOrleansandtheLouisianacoastlineisthattheentireMississippiRiverdeltaissubsidinganderoding，plungingthecitydeeperbelowsealevelandremovingathickcushionofwetlandsthatoncebufferedthecoastlinefromwindandwaves.Partofthesubsidenceisgeologicandunavoidable，butthereststemsfromtheleveesthathavehemmedintheMississippiallthewaytoitsmouthfornearlyacenturytopreventfloodsandfacilitateshipping.Asaresult，riversedimentisnolongerspreadacrossthedeltabutdumpedintotheGulfofMexico.Withoutaconstantstreamoffreshsediment，thebarrierislandsandmarshesaredisappearingrapidly，withaquarter，roughlythesizeofRhodeIsland，alreadygone.Afteryearsofpoliticalwrangling，abroadgrouppulledtogetherbytheLouisianagovernmentin1998proposedamassive$14billionplantosavetheLouisianacoasts，calledCoast2050（nowmodifiedintoaplancalledtheLouisianaCoastalAreaproject）。Wetlandrestorationwasakeycomponent.”It‘soneofthebestandcheapesthurricanedefenses，“saysDay，whochaireditsscientificadvisorycommittee.Althoughtheplanwasnevergivenmorethantokenfunding，ateamledbyDayhasbeenconductingapilotstudysince2000，divertingpartoftheMississippiintothewetlandsdownstreamofthecity.”Theresultsareasgoodaswecouldhavehoped，“hesays，withlandlevelsrisingatabout1centimeterperyear—enoughtooffsetrisingsealevels，saysDay.听力课堂,开放式外语学习平台！TingClass.com声明：本资料由听力课堂网站收集整理，仅供英语爱好者学习使用，资料版权属于原作者。-3-Evenifthewetlandswererestoredandnewleveeswerebuilt，thecombinationofgeologicsubsidenceandrisingsealevelswilllikelysinkNewOrleansanothermeterby2100.Theproblemmightbesolvedbyanotherambitiousplan，saysRoelBoumans，acoastalscientistattheUniversityofVermontinBurlingtonwhodidhisph.D.atLSU：shoringupthelowestlandwithaslurryofsedimentpipedinfromtheriver.Themajorityofthebuildingsinthefloodedareaswillh