不谈定的温度

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1、不谈定的温度　　Directions：Readthefollowingpassage.Answerthequestionsaccordingtotheinformationgiveninthepassageandtherequiredwordslimit.　　Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyaroundlargecitieswithfactoriesandheavyautomobiletraffic.Today，weknowthatalthoughthesearetheareaswitht

2、heworstairpollution，theproblemisliterallyworldwide.Onseveraloccasionsoverthepastdecade，aheavycloudofairpollutionhascoveredtheentireeasternhalfoftheUnitedStatesandledtohealthwarningseveninruralareasawayfromanymajorconcentrationofmanufacturingandautomobiletraffic.Infact，theveryclimateoftheentir

3、eearthmaybeaffectedbyairpollution.Somescientistsfeelthattheincreasingconcentrationofcarbondioxideintheairresultingfromtheburningoffossilfuels（coalandoil）iscreatinga“greenhouseeffect”―holdinginheatreflectedfromtheearthandraisingtheworld’saveragetemperature.Ifthisviewiscorrectandtheworld’stempe

4、ratureisraisedonlyafewdegrees，muchofthepolaricecapwillmeltandcitiessuchasNewYork，Boston，Miami，andNewOrleanswill3beunderwater.　　Anotherview，lesswidelyheld，isthatincreasingparticulatematterintheatmosphereisblockingsunlightandloweringtheearth’stemperature―aresultthatwouldbeequallydisastrous.Adro

5、pofjustafewdegreescouldcreatesomethingclosetonewiceageandwouldmakeagriculturedifficultorimpossibleinmanyofourtopfarmingareas.Atpresentwedonotknowforsurethateitheroftheseconditionswillhappen（thoughonerecentgovernmentreportpreparedbyexpertsinthefieldconcludedthatthegreenhouseeffectisverylikely）

6、.Perhaps，ifweareverylucky，thetwotendencieswilloffseteachotherandtheworld’stemperaturewillstayaboutthesameasitisnow.　　1.Wheredidpeoplethinkairpollutionexistmerely？（Nomorethan11words）　　___________________________________________________________________________　　2.Accordingtothetext，whatcausedth

7、e“greenhouseeffect”？（Nomorethan16words）　　___________________________________________________________________________3　　3.Whatwillhappeniftheworld’stemperatureisraisedonlyafewdegrees？（Nomorethan17words）　　_______________________________________