gmat逻辑练习题及解析(一)-智课教育

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1、智课网GMAT备考资料GMAT逻辑练习题及解析（一）-智课教育熟能生巧，只有不断练习才能强化知识点。小编为大家整理了难度系数为3星的三道GMAT逻辑练习题，希望对考生备考GMAT逻辑有所帮助。NO.1难度系数★★★StatisticsoverfourconsecutiveyearsshowedthatfourpercentmoreautomobileaccidentshappenedinCaliforniaduringtheweekfollowingtheswitchtodaylightsavingtimeandduringtheweekfollowingtheswitchbac

2、ktostandardtimethanoccurredtheweekbeforeeachevent.ThesestatisticsshowthatthesetimechangesadverselyaffectthealertnessofCaliforniadrivers.Theconclusionintheargumentaboveisbasedonwhichofthefollowingassumptions?(A)DriversinCaliforniaaswellasthoseintherestoftheUnitedStateshavesimilardrivingpattern

3、s.(B)Theobservedincreasesinaccidentratesareduealmostentirelytoanincreaseinthenumberofminoraccidents.(C)Fouryearsisnotasufficientlylongperiodoftimeoverwhichtojudgethephenomenondescribed.(D)Therearenootherfactorssuchasschoolvacationsorholidaycelebrationsthatcauseaccidentratestoriseduringthesewe

4、eks.(E)Atimechangeatanyothertimeofyearwouldnotproduceasimilarincreaseinaccidentrates.NO.2难度系数★★★Prolongedandunseasonablefrostsproducefrostringsindeciduoustrees,whichgrowinmoderateclimates.FrostringsdonotappearinanyofthefossilizeddeciduoustreesthathavebeenfoundinAntarctica.Hence,itisunlikelyth

5、atsuchfrostsoccurredinAntarcticaatthetimethefossilizedtreeslived.Whichofthefollowingisanassumptiononwhichtheargumentdepends?(A)TherearefossilizednondeciduoustreesfromAntarcticathatbearfrostrings.(B)Deciduoustreesaremorelikelytobearfrostringsthanareothertreevarieties.(C)Theprocessoffossilizati

6、ondoesnotcompletelyobscurefrostringsindeciduoustrees.(D)Present-daydeciduoustreesaremoresensitivetochangesintemperaturethanwerethedeciduoustreesofancientAntarctica.(E)ProlongedandunseasonablefroststhatmighthaveoccurredinAntarcticawhenthenow-fossilizedtreeswerestilllivingdidnotalwaysproducefro

7、stringsindeciduoustrees.NO.3难度系数★★★Theworld'sannualfoodproductionslightlyexceedstheamountoffoodrequiredtoprovideaminimallyadequatedietfortheworld'spopulation.Topredictthatinsufficientfoodproductionwillcauseahungercrisisinthefutureisnonsense.A