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’sraystoenterbutpreventstheheatfromescaping.Accordingtoaweatherexpert’sprediction,theatmospherewillbe3℃warmerintheyear2050thanitistoday,ifmancontinuestoburnfuelsatthepresentrate.Ifthiswarminguptookplace,theicecapsinthepoleswouldbegintomelt,thusraisingsealevelseveralmetresandseverelyfloodingcoastalcities.Also,theGengduoyuanxiaowanzhengkaoboyingyuzhentijiqijiexiqinglianxiquanguomianfeizixundianhua:silinglingliuliubaliujiuqiba,huojiazixunqq:qiqierliuqibawusanqiincreaseinatmospherictemperaturewouldleadtogreatchangesintheclimateofthenorthernhemisphere,possiblyresultinginanalterationofearth’schieffood-growingzones.Inthepast,concernaboutaman-madewarmingoftheearthhasconcentratedontheArcticbecausetheAntarcticismuchcolderandhasamuchthickericesheet.ButtheweatherexpertsarenowpayingmoreattentiontoWestAntarctic,whichmaybeaffectedbyonlyafewdegreesofwarming,inotherwords,byawarmingonthescalethatwillpossiblytakeplaceinthenextfiftyyearsfromtheburningoffuels.SatellitepicturesshowthatlargeareasofAntarcticiceare:Whichnaturalcausehasmosteffectontheweather?Onepossibilityisthevariablebehaviorofthesun.Astronomersatoneresearchstationhavestudiedthehotspotsand“cold”spots(thatis,therelativelylesshotspots)onthesun.Asthesunrotates,every27.5days,itpresentshotteror“colder”facestotheearth,anddifferentaspectstodifferentpartsoftheearth.Thisseemstohaveaconsiderableeffectonthedistributionoftheearth’satmosphericpressure,andconsequentlyonwindcirculation.Thesunisalsovariableoveralongterm:itsheatoutputgoesupanddownincycles,thelatesttrendbeingdownward.Scientistsarenowfindingmutualrelationsbetweenmodelsofsolar-weatherinteractionsandtheactualclimateovermanythousandsofyears,includingthelastIceAge.TheproblemisthatthemodelsarepredictingthattheworldshouldbeenteringanewIceAgeanditisnot.Onewayofsolvingthistheoreticaldifficultyistoassumeadelayofthousandsofyearswhilethesolareffectsovercometheinertia(惯性)oftheearth’sclimate.Ifthisisright,thewarming’sdiminishingheat.36.Itcanbeconcludedthataconcentrationofcarbondioxideintheatmospherewould________.[A]preventthesun’sraysfromleechingtheearth’ssurface[B]meanawarmingupintheArctic[C]accountforgreatchangesintheclimateinthenorthernhemisphere(D)[D]raisethetemperatureoftheearth’ssurface37.Thearticlewaswrittentoexplain________.[A]thegreenhouseeffect[B]thesolareffectsontheearth[C]themodelsofsolar-weatherinteractions(D)[D]thecausesaffectingweather38.Althoughthefuelconsumptionisgreaterinthenorthernhemisphere,temperaturesthereseemtobefalling.Thisis________.[A]mainlybecausethelevelsofcarbondioxidearerising[B]possiblybecausetheicecapsinthepolesaremelting[C]exclusivelyduetotheeffectoftheinertiaoftheearth’sclimate(D)[D]partlyduetovariationsintheoutputofsolarenergy39.Onthebasisoftheirmodels,scientistsareoftheopinionthat________.[A]theclimateoftheworldshouldbebecomingcooler中国考博辅导首选学校[B]itwilltakethousandsofyearsfortheinertiaoftheearth’sclimatetotakeeffect[C]theman-madewarmingeffecthelpstoincreasethesolareffects(A)[D]thenewIceAgewillbedelayedbythegreenhouseeffect40.IftheassumptionaboutthedelayofanewIceAgeiscorrect,________.[A]thebestwaytoovercomethecoolingeffectwouldbetoburnmorefuels[B]icewouldsooncoverthenorthernhemisphere[C]theincreasedlevelsofcarbondioxideintheatmospherecouldwarmuptheearthevenmorequickly(D)[D]thegreenhouseeffectcouldworktotheadvantageoftheearthText2Somepeoplebelievethatinternationalsportcreatesgoodwillbetweenthenationsandthatifcountriesplaygamestogethertheywilllearntolivetogether.Otherssaythattheoppositeistrue:thatinternationalcontestsencouragefalsenationalprideandleadtomisunderstandingandhatred.Thereisprobablysometruthinbotharguments,butinrecentyearstheOlympicGameshavedonelittletosupporttheviewthatsportsencouragesinternationalbrotherhood.Notonlywastherethetragicincidentinvolvingthemurderofathletes,buttheGameswerealsoruinedbylesserincidentscausedprincipallybyminornationalcontests.(曲棍球)final.Therehadbeennoisyscenesattheendofthehockeymatch,thelosersobjectingtothefinaldecisions.Theywereconvincedthatoneoftheirgoalsshouldnothavebeendisallowedandthattheiropponents’victorywasunfair.Theirmanagerwasinaragewhenhesaid:“Thiswasn’thockey.HockeyandtheInternationalHockeyFederationarefinished.”ThepresidentoftheFederationsaidlaterthatsuchbehaviorcouldresultinthesuspensionoftheteamforatleastthreeyears.TheAmericanbasketballteamannounce