- 阅读理解B
题干:Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglassintheroofofagreenwhichallowsthesun’sraystoenterbutpreventstheheatfromescaping.1.()Accordingtoaweatherexpert’sprediction,theatmospherewillbe3℃warmerintheyear2050thanitistoday,ifmancontinuestoburnfuelsatthepresentrate.Ifthiswarming-uptookplace,theicecapsinthepoleswouldbegintomelt,thusraisingsealevelseveralmetersandseverelyfloodingcoastalcities.Also,theincreaseinatmospherictemperaturewouldleadtogreatchangesintheclimateofthenorthernhemisphere,possiblyresultinginanalterationoftheearth’schieffood-growingzones.2.()Inthepast,concernaboutaman-madewarmingoftheearthhasconcentratedontheArcticbecausetheAntarcticismuchcolderandhasamuchthickericesheet.ButtheweatherexpertsarenowpayingmoreattentiontoWestAntarctic,whichmaybeaffectedbyonlyafewdegreesofwarming;inotherwords,byawarmingonthescalethatwillpossiblytakeplaceinthenextfiftyyearsfromtheburningoffuels.3.()SatellitepicturesshowthatlargeareasofAntarcticicearealreadydisappearing.Theevidenceavailablesuggeststhatawarminghastakenplace.Thisfitsthetheorythatcarbondioxidewarmstheearth.However,mostofthefuelisburntinthenorthernhemisphere,wheretemperaturesseentobefalling.Scientistsconclude,therefore,thatuptonownaturalinfluencesontheweatherhaveexceededthosecausedbyman.Thequestionis:whichnaturalcausehasmosteffectontheweather?4.()Onepossibilityisthevariablebehaviorofthesun.Astronomersatoneresearchstationhavestudiedthehotspotsand“cold”spots(thatis,therelativelylesshotspots)onthesun.Asthesunrotates,every27.5days,itpresentshotteror“colder”facetotheearth,anddifferentaspectstodifferentpartsoftheearth.Thisseemstohaveaconsiderableeffectonthedistributionoftheearth’satmosphericpressure,andconsequentlyonwindcirculation.Thesunisalsovariableoveralongterm:itsheatoutputgoesupanddownincycles,thelatesttrendbeingdownward.5.()Scientistarenowfindingmutualrelationsbetweenmodelsofsolar-weatherinteractionsandtheactualclimateovermanythousandsofyears,includingthelastIceAge.TheproblemisthatthemodelsarepredictingthattheworldshouldbeenteringanewIceAgeanditisnot.Onewayofsolvingthistheoreticaldifficultyistoassumeadelayofthousandsofyearswhilethesolareffectsovercometheinertiaoftheearth’sclimate.Ifthisisright,thewarmingeffectofcarbondioxidemightthusbeservingasausefulcounter-balancetothesun’sdiminishingheat.
题目:(1) - A 、Global warming becomes more severe than before
- B 、Shifted focus
- C 、Global warming might be good for the earth
- D 、Balance must be achieved
- E 、One example of natural cause
- 、Scientists conclude a more significant impact on the weather
- 、Possible geographic and climate changes in the future
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【正确答案:7】
根据 According to a weather expert’s prediction, the atmosphere will be 3℃ warmer in the year 2050 than it is to- day, 说明预测是将来的事情,完成时态和2050年都说明是in the future. B选项是现在跟以前相比。
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