英语考试

TheatmosphereisablanketofgasesaroundtheEarth,Forthousandsofyearsthesegaseshavekepttheplanet'stemperatureatabout15°C.How?Bytrappingsomeofthesun'sheat,Butnow,becauseofpollution,therearemoreandmorehotgasesreleasedintotheatmosphere,ThismeansthattheEarthisgettinghotter,Agreenhousebecomeshotfortheatmosphere,ThismeansthattheEarthisgettinghotter,Agreenhousebecomeshotforthesamereason,Itsglassletsthesun'sheatpassthrough,thenstopssomeofitfromleaving,That'swhyscientistscalltheproblemoftheEarth'srisingtemperature"theGreenhouseEffect."

ManyscientistsagreethattheGreenhouseEffectwilladdbetween1.5°C-4°CtotheEarth'stemperatureby2030,Thiswillchangetheweathereverywhere,Forexample,theiceattheNorthandSouthpoleswillstarttomelt,Andwhenthathappens,theleveloftheseawillrise,Ifitrisesonemetreby2030therewillbeseriousfloodsinmanycountries.

Thenthereistheproblemoffood,whentheclimatechangestherewillbelessfoodintheworld,AtthemomentareasliketheMidwestofAmericaandcentralRussiagrowalotofwheat,InthefuturethatmaychangewhentheUSAandRussiabecometoodryforfarming,Othercountries(likeCandaandSweden)willbecomewetter,butthatwon'thelp,Thesoilthereisn'tasrich,Itwon'tbepossibletogrowthesameamountoffoodasbefore.

Wecan'tstoptheGreenhouseEffect,However,wecanslowitdownifweuselessfossilfuel,protectrain-forests,usemorenaturalenergyfromthesun,seaandwind,andbanFreoninourlives.

26.whyistheearthgettinghoter?

a.theatmospherearoundtheearth

b.airpollution

c.morehoygasesintotheatmosphere

d.thsunisgettinghotter

27whichstatementisuntrueforthegreenhousesffect

a.tochargetheeatherthroghouttheeffect

b.icewillstoptomelt

c.thenorthandsouthpolesstarttomelt

d.seriousfloodstakeplace

28.whentheclimatechanges,thendollowstheproblemof_.

a.environmentb.foodc.employmentd.energy

29whichcountrieswilbecomewetterthantheyusedtobe?

atheUSAandRUSSIAb.americaandcanadac.europeansd.swe