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1、课时作业 29Ⅰ.阅读理解(2019·福建省厦门第一中学高三月考)TherehavebeenclaimsthatwarmingonMarsandPlutoisproofthattherecentwarmingonEarthiscausedbyanincreaseinsolaractivity,andnotbygreenhousegases.Butwecansaywithcertaintythat,evenifMars,Plutooranyotherplanethaswarmedinrecentyears,itisnotduetochangesinsolaractivity.TheSun
2、'senergyoutputhasnotincreasedsincedirectmeasurementsbeganin1978.Ifincreasedsolaroutputreallywasresponsible,weshouldbeseeingwarmingonalltheplanetsandtheirmoons,notjustMarsandPluto.Oursolarsystemhaseightplanets,threedwarfplanetsandquiteafewmoonswithatleastathinatmosphere,andthusaclimateofsorts.The
3、irclimateswillbeaffectedbylocalfactorssuchasorbitalvariations,changesinreflectanceandevenvolcaniceruptions,soitwouldnotbesurprisingifseveralplanetsandmoonsturnouttobewarmingatanyonetime.OnetheoryisthatwindshaverecentlysweptsomeareasofMarscleanofdust,darkeningthesurface,warmingtheRedPlanetandlead
4、ingtofurtherincreasesinwindiness—apositivefeedbackeffect.ObservationsofthethicknessofPluto'satmospherein2002suggestedthedwarfplanetwaswarmingevenasitsorbittookitfurtherfromtheSun.Thefindingconfusedastronomersatthetime,andthecausehadyettobedetermined.Ithassincebeensuggestedthatthisisduetoagreenho
5、useeffect:AsitgetsclosertotheSun,Plutomaywarmenoughforsomeofthemethaneiceonitssurfacetoturnintoagas.Thiswouldcausefurtherwarming,whichwouldcontinueforawhileevenafterPluto'sorbitstartstotakeitawayfromtheSun.本文是一篇科普说明文，有人认为地球变暖是因为太阳活动而不是温室气体，文章驳斥了这个观点。同时对太阳系里另外一些星星的变暖情况分别进行了分析。1．Whatcause(s)thewar
6、mingofsomeplanets?A．Thesolarsystem.B．Theirlocalfactors.C．Volcanicmountains.D．Thethinatmosphere.答案：B解析：细节理解题。根据第三段第二句Theirclimateswillbeaffectedbylocalfactorssuchasorbitalvariations,changesinreflectanceandevenvolcaniceruptions可知，导致某些星球变暖的原因很多，可能是受到这些星球的当地因素的影响。故B项正确。2．Whatistheoutcomeoftherecentw
7、indsonMars?A．They'vecooledtheplanet.B．They'veleftaclearsky.C．They'vecausedmorewinds.D．They'vehelpedcleantheplanet.答案：C解析：推理判断题。根据文章第四段OnetheoryisthatwindshaverecentlysweptsomeareasofMarscleanofdust,darkeningthesurface,warmin
