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★★★StatisticsoverfourconsecutiveyearsshowedthatfourpercentmoreautomobileaccidentshappenedinCaliforniaduringtheweekfollowingtheswitchtodaylightsavingtimeandduringtheweekfollowin

2、gtheswitchbacktostandardtimethanoccurredtheweekbeforeeachevent.ThesestatisticsshowthatthesetimechangesadverselyaffectthealertnessofCaliforniadrivers.Theconclusionintheargumentaboveisbasedonwhichofthefollowingassumptions?(A)DriversinCaliforniaaswellasthoseintherestoftheUnitedState

3、shavesimilardrivingpatterns.(B)Theobservedincreasesinaccidentratesareduealmostentirelytoanincreaseinthenumberofminoraccidents.(C)Fouryearsisnotasufficientlylongperiodoftimeoverwhichtojudgethephenomenondescribed.(D)Therearenootherfactorssuchasschoolvacationsorholidaycelebrationsth

4、atcauseaccidentratestoriseduringtheseweeks.(E)Atimechangeatanyothertimeofyearwouldnotproduceasimilarincreaseinaccidentrates.NO.2难度系数★★★Prolongedandunseasonablefrostsproducefrostringsindeciduoustrees,whichgrowinmoderateclimates.Frostringsdonotappearinanyofthefossilizeddeciduoustre

5、esthathavebeenfoundinAntarctica.Hence,itisunlikelythatsuchfrostsoccurredinAntarcticaatthetimethefossilizedtreeslived.Whichofthefollowingisanassumptiononwhichtheargumentdepends?(A)TherearefossilizednondeciduoustreesfromAntarcticathatbearfrostrings.(B)Deciduoustreesaremorelikelytob

6、earfrostringsthanareothertreevarieties.(C)Theprocessoffossilizationdoesnotcompletelyobscurefrostringsindeciduoustrees.(D)Present-daydeciduoustreesaremoresensitivetochangesintemperaturethanwerethedeciduoustreesofancientAntarctica.(E)Prolongedandunseasonablefroststhatmighthaveoccur

7、redinAntarcticawhenthenow-fossilizedtreeswerestilllivingdidnotalwaysproducefrostringsindeciduoustrees.NO.3难度系数★★★Theworld'sannualfoodproductionslightlyexceedstheamountoffoodrequiredtoprovideaminimallyadequatedietfortheworld'spopulation.Topredictthatinsufficientfoodproductionwillc

8、auseahungercrisisinthefutureisnonsense.A