大学英语考试复习资料大学四级模拟1071.docx
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大学英语考试复习资料大学四级模拟1071.docx
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大学英语考试复习资料大学四级模拟1071
[大学英语考试复习资料]大学四级模拟107
大学四级模拟107
PartⅠWriting
Directions:
Forthispart,youareallowed30minutestowritealetterofadvicetoyourcousinabouthowtospendthefirstwinterholidayincollege.Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelow.
问题:
1.机动车被看作是空气污染的首要原因
2.提出解决这一问题的方法
3.并说明原因
OneWaytoSolvetheProblem
答案:
OneWaytoSolvetheProblem
TodealwiththeairpollutioncausedbyVehiclesincitiesisachallengingjob.Mysuggestionistoproducevehiclespoweredbysolarenergy.
Comparedwithmineralfuelssuchasgasoline,solarenergyisinexhaustibleinsupply.Thegrowthofcitiesandincreaseofvehiclescallformoresupplyofenergy,butthereisalimittothereserveofoff.Sosolarenergywithitsendlesssupplyisoneofoursolutionstoenergycrisis.Thesecondadvantageofsolarenergyisitscleanliness.Traditionalvehiclesoperatingongasolinegiveoffexhaust,causingdamagetohumanhealthandpollutingtheair.Fromtheperspectiveofenvironmentalprotectionsolarenergyisamuchbetterchoice.Afterthenewtechnologybecomeseconomicallyfeasible,theskyovercitieswillbebrighter,andtheairwillnolongerbeathreattoourhealth.
Becauseofthetwobenefitsofusingsolarenergyasanewfuel,weshouldspendmoremoneyontheresearchwhichcanmakeourdreamcometrue.
PartⅡReadingComprehension(SkimmingandScanning)
ADelicateBalance
In1965theAmericanstatesmanAdlaiEStevensonsaid,"Wealltraveltogether,passengersonalittlespaceship,dependentonitsvulnerablesuppliesofairandsoil.Wemanagetosurvivebythecare,work,andlovewegiveourfragilecraft."Ourplanetisindeedfragile.Everylivingthingonthisplanetispartofacomplicatedweboflife,fornoorganismlivesentirelyonitsown.Everyorganismisaffectedbyallthatsurroundsitwhetherlivingornonliving.Andinturneachorganismhassomeeffectonitssurroundings.
Eventhemostelementaryunderstandingofecologyrequiresknowledgeofthiscause/effectrelationshipallorganismshaveoneachother.Everythingwedotoourenvironmentwillinonewayoranotheraffectthequalityoflifeweexperienceonthistinyspaceship.Ifwewantthequalityoflifetobehigh,wemustbemoreawarethatnatureisafinelybalancedmechanismandthatitwillnottoleratetheabusewehavebeengivingit.Considerthefollowingexamplesofhumanignoranceconcerningthedelicatebalanceofnature.
AswanandOtherFables
"Oncetherewasacountrythatdesperatelyneededfoodandenergyforitsgrowingpopulation.Ithappenedthatoneofthemostmagnificentriversintheworldflowedthroughthiscountry.Eachyeartheriverdepositedtonsofmineral-richsiltonitsfertilefloodplainbeforeitreachedthesea."Whynotdamtheriver,"saidthecountry'sleaders,"andusethewatertoirrigatemoreland,controltheannualspringfloodingoftheriver,andprovidehydroelectricpowerallatthesametime?
"Theresultofthismodern-dayfairytaleisknownasthebillion-dollarAswanHighDamofEgypt,andnotallEgyptiansarelivinghappilyeverafter.
"Foronething,aswaterbackedupbehindthedam,almost100,000EgyptianshadtochoosebetweengivinguptheirfamilyhomesandbeingsubmergedalongwithancientandpricelesstemplesthatwerepartofEgypt'sculturalheritage.Buttherehavebeenfarmoredevastatingresults.NowthattheNileRiverfloodplainisdeprivedofitsannualenrichmentwithsilt,artificialfertilizerhastobetruckedinatacostof100milliondollarsayear—acostcarriedbythesubsistencefarmerswhomake,ontheaverage,lessthanahundreddollarsayeareach.Furthermore,nowthereisnothingtowashawaythepreviousyear'ssiltbuildupinthesoil.Andwithsiltdepositsnolongercompensatingforerosion,thefertileriverdeltaisshrinking—andanalarmingpartofwhatremainshascompletelydriedup.Restoringthedeltawithpumps,drains,andwellsmaycostmorethanthedamitself."
"Ironically,evaporationaswellasbottomseepagefromthenewlakefillinginbehindthedamissogreatthatthelakebasinmayneverfilluptopredictedlevels.Sonobodycanlivearoundthelakebecausenobodyknowsforsurewheretheshorelinewillbe.Moreseriously,thereislesswatertogoaroundthantherewasbefore.Andeventhoughsome700,000newacres(about1.6millionhectares)havebeenopenedupforagriculture,thepopulationoutgrewthepotentialfoodincreaseevenbeforethedamwasfinished.Atthesametime,withthenutrient-richflowoftheNileturnedoff,anothermajorfoodsource-thesardines,shrimp,andmackerelthatflourishedintheenrichedwatersoffthedelta—hasdeclinedcatastrophically.Worseyet,thelakeandtheirrigationnetworkshavesoacceleratedthespreadofbloodflukest
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