2012新gre逻辑阅读每日一题14-智课教育旗下智课教育

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1、智课网GRE备考资料2012新GRE逻辑阅读每日一题14-智课教育旗下智课教育ObservationsoftheArcticrevealthattheArcticOceaniscoveredbylessiceeachsummerthantheprevioussummer.Ifthiswarmingtrendcontinues,within50yearstheArcticOceanwillbeicefreeduringthesummermonths.Thisoccurrencewouldinitselfhavelittleornoeffectong

2、lobalsealevels,sincethemeltingoficefloatinginwaterdoesnotaffectthewaterlevel.However,seriousconsequencestosealevelswouldeventuallyresult,because__________.22.Whichofthefollowingmostlogicallycompletesthepassage?(A)largemassesoffloatingseaicewouldcontinuetoforminthewintertime(B

3、)significantchangesinArcticseatemperatureswouldbeaccompaniedbychangesinseatemperaturesinmoretemperatepartsoftheworld(C)suchawarmArcticOceanwouldtriggerthemeltingofmassivelandbasedglaciersintheArctic(D)anice-freeArcticOceanwouldsupportaverydifferentecosystemthanitdoespresently

4、(E)inthespring,meltingseaicewouldcausemoreicebergstobecreatedandtodriftsouthintoshippingroutes答案：CExplanationTologicallycompletethepassage’sopen-ended“because,”somethingisneededthatwillexplainwhythecontinuationofthewarmingtrendwouldhaveseriousconsequencesforsealevels.Thepassa

5、geexplainsthatthemeltingoftheArcticOceanicewillnotaffectsealevelsbecausethecontributionthatthewatercontainedinthaticemakestosealevelsisthesamewhetherthewaterisfrozenorliquid.ButChoiceCpointstoawayinwhichincreasingtemperaturesintheArcticcouldaddwatertotheocean,namelybymeltingi

6、ceontheland.SoChoiceClogicallycompletesthepassageandisthecorrectanswer.Giventhatthepassagehasalreadyexplainedthatmeltingseaicedoesnotaffectsealevels,theformationofseaicedescribedinChoiceAdoesnotexplainwhytherewouldbeconsequencesforsealevels.ChoicesB,D,andEalldescribepossiblec

7、onsequencesofincreasedtemperaturesintheArctic,butnoneoftheseconsequencessuggestsamechanismbywhichsealevelswouldchange.Sononeoftheseoptionsprovidesalogicalcompletionforthepassage.