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1、2019-2020年高考英语一轮复习Unit4Globalwarming练习新人教版选修6Ⅰ.阅读理解(xx·皖南八校第二次联考)Wesometimesthinkglobalwarmingorclimatechangeisaproblemveryfarawayfromourlives,andthatonlythegovernmentneedstoworryaboutit.Butit'shardlypossibletopletelystayoutofit—scientistsarenow95percentsurethathumanshavebeenthe“
2、dominantcause”ofglobalwarmingtrendssincethe1950s.OneoftheconclusionsofareportreleasedonSept27bytheUnitedNationssaysthathumanactivitieshavecausedglobaltemperaturestoriseby0.89℃between1901andxx.Thatmightnotseemlikealot,butthetruthisthatamajorpartofthatheathasbeenabsorbedintotheocea
3、ns,whichisnotsurprisinggiventhattheycovertwothirdsofEarth'ssurface.Also,waterhasamuchgreatercapacity(容量)toabsorbheatthantheairdoes,accordingtoTheEconomist.WhilemanygreenhousegasesoccurnaturallyandareneededtokeeptheEarthwarmenoughtosupportlife,humans'useoffossilfuelsisthemainsourc
4、eofexcess(多余的)greenhousegases.AccordingtoCNN,bydrivingcars,usingelectricityproducedbyburningcoalandoilorheatingourhomeswithcoalornaturalgas,wereleasealargeamountofgreenhousegasesintotheatmosphere.Yourbodycanbarelyfeeladifferenceof0.89℃，buttheEarth'secosystemsaresosensitivethateve
5、nsmallchangescandisturbthem.Itoftenstartswiththesmallestcreaturesatthebottomofthefoodchain,eventuallyaffectingbiggeranimals,manyofwhichcouldendupbeingextinct.Globalwarmingisalsolinkedtoanincreaseinextremeweather.Alargeramountofcarbondioxidetrapsmoreenergyinsidetheatmosphere.Thisc
6、hangesthepatternsofstormsandrainfallinmanyregionsandcanleadtodroughtsandfloods.Worsestill,meltingseaiceinwarmeroceansiscausingsealevelstoriseataspeedofmorethanthreemillimetersperyear,accordingtoTheGuardian,whichalsoincreasestheriskofflooding.“Thereportshouldserveasanotherwakeupca
7、llthatouractivitiestodayhaveaprofoundimpactonsociety,notonlyforus,butformanygenerationstoe，”FrenchMichelJarraud,secretarygeneraloftheWorldMeteorologicalOrganization,saidatanewsconference.文章大意：全球变暖不是只有政府才关心的事，它与我们每个人都息息相关。1．Theunderlinedword“dominant”inthefirstparagraphmeans“_____
8、___”．A．mon B．indirectC．secondaryD．l
