专转本模拟十

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1、全真模拟试题（十）第一卷（共70分）PartIReadingComprehension(40%35minutes)Directions:Inthisparttherearefourpassages.Eachpassageisfollowedbyanumberofcomprehensionquestions.Readthepassageandchoosethebestanswertoeachquestion.Then,markyouranswerbyblackeningthecorrespondingletterontheAnswerSheet.Quest

2、ions1to5arebasedonthefollowingpassage:Agreenhouseisabuildingmadeofglasswhichisusedforkeepingplantswarmwhentheoutsidetemperatureislow.Inasimilarwaythereareseveralgasesintheatmosphere,whichtraptheheatproducedbythesunandpreventitfromescaping.Thesegasesareknownas“greenhousegases”,and

3、thewayinwhichtheytrapheatintheatmosphereiscalledthe“greenhouseeffect”.Thisisnotsimplyairpollution.Mostofthemaingreenhousegasesexistnaturallyinsmallamountsinouratmosphere,andwithoutthemearthwouldbe30degreescolderandhumanlifewouldnotexist.Inotherwords,thegreenhouseeffectisanaturalc

4、oursewhichistosomedegreehelpfultous.Theproblemisthatinthelastcenturyandahalf,wehavebeenputtingtoomanyofthesegasesintotheearth’satmospherebyburninglargequantitiesofcoalandoilandbycuttingdownforests.Therapidincreaseingreenhousegasesismakingtheworldwarmer.Theworld’stemperaturehasalr

5、eadygoneupbyhalfadegreethiscentury,andthesealevelhasrisenby10centimeters.Iftheamountofcarbondioxideintheatmospheredoublestherewillprobablybeariseintheearth’stemperatureofbetween1and4.Thismayseemasmallincrease,butitwouldbeenoughtocausemajorchangesingeographyandagriculture.Largeare

6、asoftheworldwouldbeflooded,andsomeareaswouldbecomedryandunabletoproducecrops.Itisimportant,too,toconsiderthattheremaybeadelayofabout30yearsinthegreenhouseeffect.Thismeansthatweareprobablyexperiencing209onlynowtheeffectofthegasesputintotheatmospherebeforethe1960s.Sincethen,ouruseo

7、fthesegaseshasgreatlyincreased.1.“Greenhouseeffect”means________.　A.thewayinwhichgasesareusedforkeepingplantswarm　B.anaturalcoursewhichistosomedegreehelpfultous　C.theway“greenhousegases”trapheatontheearth　D.thewholecourseinwhichgreenhousegasespreventheat2.Iftherewerenogreenhousee

8、ffect,________.　A.noplantswouldgrowonour