08新版gmat逻辑-讲义

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1、新东方在线[www.koolearn.com]网络课堂电子教材系列GMAT逻辑讲义GMAT逻辑讲义主讲：费允杰欢迎使用新东方在线电子教材第一章做题步骤一、先读问题 二、再读文章 三、再看选项第二章五大题型一、归纳题 公共元素直推法。ifAthenB表示A充分的推出B（A→B）；onlyifAthenB表示只有A才有B（B→A）；规则：和onlyif最接近的元素一定是必要条件，是箭头所指方向。byAinordertoB表示A推出B（A→B）；mustbyAinordertoB表示B推出A（B→A

2、）；规则：和must最接近的元素一定是必要条件，是箭头所指方向。IfonlyA,thenB表示只有A才有B(A→B)；NotA,unlessB表示没有A除非有B（A→B）；A,unlessB表示非B推出A或者非A推出B（→A,→B）；ArequireB表示B是A的必要条件（A→B）；AisnecessarytoB表示A是B成立的必需（B→A）；Adepend/draw/baseonB表示B是A成立的必需（A→B）。17新东方在线[www.koolearn.com]网络课堂电子教材系列GMAT逻辑讲

3、义例1.所有的人都去了。我是人。公共信息：人直接推结论：我去了。例2.Tobementallyhealthy,peoplemusthaveself-respect.Peoplecanmaintainself-respectonlybycontinuallyearningtherespectofotherstheyesteem.Theycanearnthisrespectonlybytreatingtheseothersmorally.Whichofthefollowingconclusionsca

4、nbeproperlydrawnfromthestatementsabove?(A)Peoplewhoarementallyhealthywillbetreatedmorallybyothers.(B)Peoplewhoarementallyhealthywillhavetreatedmorallythosetheyesteem.(C)Peoplewhoarementallyhealthymusthaveself-respectinothertobetreatedmorallybyothers.(

5、D)Peoplecanexpecttobetreatedmorallybyothersonlyiftheyesteemtheseothers.(E)Peoplewhohaveself-respectseldomtreatmorallythoseesteem.例3.Mosttelevisionviewersestimatehowfrequentlyaparticulartypeofaccidentorcrimeoccursbyhowextensivelyitisdiscussedontelevisi

6、onnewsshows.Televisionnewsshowsreportmoreonstoriesthatincludedramaticpicturessuchasfiresandmotorvehicleaccidentsthantheydoonmorecommonstoriesthathavelittlevisualdramasuchasbookkeepingfraud.Ifthestatementsabovearetrue,itcanbeproperlyconcludedthatwhicho

7、fthefollowingisalsotrue?(A)Thetimetelevisionnewsreportersspendresearchingnewsstoriesisdirectlyrelatedtothenumberofviewerswhowillbeaffectedbyeventslikethoseinthenewsstories.(B)Itiseasierforcrimessuchasbookkeepingfraudtogounprosecutedthanitiscrimessucha

8、sarson.(C)Thenumberoffiresandmotorvehicleaccidentsgreatlyincreasesaftereachtelevisionnewsshowthatincludesdramaticpicturesofafireormotorvehicleaccident.(D)Viewersoftelevisionnewsshowtendtooverestimatethenumberoffiresandmotorvehicleaccidentsthat