- 阅读理解A
题干：Intheatmosphere,carbondioxideactsratherlikeaone-waymirrorortheglassintheroofofagreenhousewhichallowsthesun’sraystoenterbutpreventstheheatfromescaping.Accordingtoaweatherexpert’sprediction,theatmospherewillbe3°Cwarmerintheyear2050thanitistoday,ifmancontinuestoburnfuelsatthepresentrate.Ifthiswarminguptookplace,theicecapsinthepoleswouldbegintomelt,thusraisingsealevelseveralmetersandseverelyfloodingcoastalcities.Also,theincreaseinatmospherictemperaturewouldleadtogreatchangesintheclimateofthenorthernhemisphere,possiblyresultinginanalterationoftheearth’schieffoodgrowingzones.Inthepast,concernaboutaman-madewarmingoftheearthhasconcentratedontheArcticbecausetheAntarcticismuchcolderandhasamuchthickericesheet.ButtheweatherexpertsarenowpayingmoreattentiontoWestAntarctic,whichmaybeaffectedbyonlyafewdegreesofwarming:inotherwords,byawarmingonthescalethatwillpossiblytakeplaceinthenextfiftyyearsfromtheburningoffuels.SatellitepicturesshowthatlargeareasofAntarcticicearealreadydisappearing.Theevidenceavailablesuggeststhatawarminghastakenplace.Thisfitsthetheorythatcarbondioxidewarmstheearth.However,mostofthefuelisburntinthenorthernhemisphere,wheretemperaturesseemtobefalling.Scientistsconclude,therefore,thatuptonownaturalinfluencesontheweatherhaveexceededthosecausedbyman.Thequestionis:Whichnaturalcausehasmosteffectontheweather?Onepossibilityisthevariablebehaviorofthesun.Astronomersatoneresearchstationhavestudiedthehotspotsand‘cold’spots(thatis,therelativelylesshotspots)onthesun.Asthesunrotates,every27.5days,itpresentshotteror‘colder’facestotheearth,anddifferentaspectstodifferentpartsoftheearth.Thisseemstohaveaconsiderableeffectonthedistributionoftheearth’satmosphericpressure,andconsequentlyonwindcirculation.Thesunisalsovariableoveralongterm:itsheatoutputgoesupanddownincycles,thelatesttrendbeingdownward.Scientistsarenowfindingmutualrelationsbetweenmodelsofsolarweatherinteractionsandtheactualclimateovermanythousandsofyears,includingthelastIceAge.TheproblemisthatthemodelsarepredictingthattheworldshouldbeenteringanewIceAgeanditisnot.Onewayofsolvingthistheoreticaldifficultyistoassumeadelayofthousandsofyearswhilethesolareffectsovercometheinertia(惯性)oftheearth’sclimate.Ifthisisright,thewarmingeffectofcarbondioxidemightthusbeservingasausefulcounterbalancetothesun’sdiminishingheat.
题目： On the basis of their models, scientists are of the opinion that（）. - A 、the climate of the world should be becoming cooler
- B 、it will take thousands of years for the inertia of the earth’s climate to take effect
- C 、the man made warming effect helps to increase the solar effects
- D 、the new Ice Age will be delayed by the greenhouse effect
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参考答案【正确答案：A】
根据文章的第七段的第二句话，“…that the models are predicting that the world should be entering a new Ice Age”，说明科学家认为气候应该变得更冷。因此本题目的正确答案是A。B所表达的内容与原文不符，C所表达的内容与原文正相（counterbalance to the Sun’s diminishing heat），D的内容与文章中论述models表明的情况无关。
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