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时间:2020-08-08
《2013专升本英语模拟试题四.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、专升本英语模拟试题(四)模拟试题(四)PartIReadingComprehension(40%35minutes)Directions:Inthisparttherearefourpassages.Eachpassageisfollowedbyanumberofcomprehensionquestions.Readthepassageandchoosethebestanswertoeachquestion.Then,markyouranswerbyblackeningthecorrespondingletterontheAnswerSheet.Quest
2、ions1to5arebasedonthefollowingpassage:Agreenhouseisabuildingmadeofglasswhichisusedforkeepingplantswarmwhentheoutsidetemperatureislow.Inasimilarwaythereareseveralgasesintheatmosphere,whichtraptheheatproducedbythesunandpreventitfromescaping.Thesegasesareknownas“greenhousegases”,andt
3、hewayinwhichtheytrapheatintheatmosphereiscalledthe“greenhouseeffect”.Thisisnotsimplyairpollution.Mostofthemaingreenhousegasesexistnaturallyinsmallamountsinouratmosphere,andwithoutthemearthwouldbe30degreescolderandhumanlifewouldnotexist.Inotherwords,thegreenhouseeffectisanaturalcou
4、rsewhichistosomedegreehelpfultous.Theproblemisthatinthelastcenturyandahalf,wehavebeenputtingtoomanyofthesegasesintotheearth'satmospherebyburninglargequantitiesofcoalandoilandbycuttingdownforests.Therapidincreaseingreenhousegasesismakingtheworldwarmer.Theworld’stemperaturehasalread
5、ygoneupbyhalfadegreethiscentury,andthesealevelhasrisenby10centimeters.Iftheamountofcarbondioxideintheatmospheredoublestherewillprobablybeariseintheearth’stemperatureofbetween1and4.Thismayseemasmallincrease,butitwouldbeenoughtocausemajorchangesingeographyandagriculture.Largeareasof
6、theworldwouldbeflooded,andsomeareaswouldbecomedryandunabletoproducecrops.Itisimportant,too,toconsiderthattheremaybeadelayofabout30yearsinthegreenhouseeffect.Thismeansthatweareprobablyexperiencingonlynowtheeffectofthegasesputintotheatmospherebeforethe1960s.Sincethen,ouruseofthesega
7、seshasgreatlyincreased.1.“Greenhouseeffect”means_________.A.thewayinwhichgasesareusedforkeepingplantswarmB.anaturalcoursewhichistosomedegreehelpfultousC.theway"greenhousegases"trapheatontheearthD.thewholecourseinwhichgreenhousegasespreventheat2.Iftherewerenogreenhouseeffect,______
8、_____.A.noplantswouldgrowonourpla
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