LSAT分析推理篇.doc

LSAT分析推理篇分析推理部分一般分四组，共有24个问题。每组里面的每一个问题都基于一系列的条件，这些条件共同描述一种情况。例如，把人分成几组，把物品按顺序排列等等。这部分试题主要测试考生理解有关关系结构并推出结论的能力，于GRE考试逻辑部分极为相象。【题型概况】1.有关分布的题型Sixcampers:Alice,Betty,Carmen,Dora,Gina,andHarrietarearrangingadishwashingscheduleforthesixdaysoftheircampingtripsothateachofthemwillwashdishesononlyoneday.Bettywasheseitheronday2orday6.IfAlicewashesondayI,Carmenwashesonday4;Carmendoesnotwashonday4unlessAlicewashesondayI.IfAlicewashesondayI,Harrietwashesonday5;Harrietdoesnotwashonday5unless Alicewashesonday1.IfGinadoesnotwashonday3,Alicewashesonday3.IfAlicewashesonday4,Dorawashesonday5.IfBettywashesonday2,Ginawashesonday5.IfHarrietwashesonday6,Dorawashesonday4.Question:*Whichoneofthefollowingisanacceptableorderinwhichthecamperscanwashdishesfromthefirsttothelastday?(A)Dora,Betty,Alice,Gina,Carmen,Harriet(B)Betty,Alice,Harriet,Carmen,Gina,Dora(C)Harriet,Gina,Betty,Carmen,Dora,Alice(D)Carmen,Betty,Alice,Dora,Gina,Harriet(E)Alice,Betty,Dora,Carmen,Gina,Harriet*IfDorawashesonday6,onwhichdaydoesCarmenwash?(A)I(B)2(C)3(D)4(E)52.有关排列次序的问题EachofseventravelersNorris,Oribe,Paulsen,Rosen,Semonelli,Tan,andUnderwoodwillbeassignedtoexactlyoneofnineairplaneseats.Theseatsarenumberedfrom1through9andarrangedinrowsasfollows:Frontrow:123Middlerow:456Lastrow:789Onlyseatsinthesamerowaseachotherareimmediatelybesideeachother.Seatassignmentsmustmeetthefollowingconditions:Oribesseatisinthelastrow.PaulsensseatisimmediatelybesideRosensseatandalsoimmediatelybesideanunassignedseat.RosensseatisintherowimmediatelybehindtherowinwhichNorrisseatislocated.NeitherSemonellinorUnderwoodisseatedimmediatelybesideNorris.Question:*Whichoneofthefollowingisapairoftravelerswhocouldbeassignedtoseats2and8,respectively?(A)Norris,Semonelli(B)Oribe,Underwood(C)Paulsen,Oribe(D)Rosen,Semonelli(E)Underwood,Tan*IfSemonelliandUnderwoodarenotassignedtoseatsinthesamerowaseachother,whichoneofthefollowingmustbefalse?(A)Norrisisassignedtoseat2.(B)Paulsenisassignedtoseat5.(C)Rosenisassignedtoseat4.(D)Tanisassignedtoseat2.(E)Underwoodisassignedtoseat1.3.有关编组的问题Ajewelermakesasinglestrandofbeadsbythreadingontoastringinasingledirectionfromaclaspaseriesofsolid-coloredbeads.Eachbeadiseithergreen,orange,purple,red,oryellow.Theresultingstrandsatisfiesthefollowingspecifications:Ifapurplebeadisadjacenttoayellowbead,anybeadthatimmediatelyfollowsandanybeadthatimmediatelyprecedesthatpairmustbered.Anypairofbeadsadjacenttoeachotherthatarethesamecoloraseachothermustbegreen.Noorangebeadcanbeadjacenttoanyredbead.Anyportionofthestrandcontainingeightconsecutivebeadsmustincludeatleastonebeadofeachcolor.Question:*Ifthestrandhasexactlyeightbeads,whichoneofthefollowingisanacceptableorder,startingfromtheclasp,fortheeightbeads?(A)green,red,purple,yellow,red,orange,green,purple(B)orange,yellow,red,red,yellow,purple,red,green(C)purple,yellow,red,green,green,orange,yellow,orange(D)red,orange,red,yellow,purple,green,yellow,green(E)red,yellow,purple,red,green,red,green,green*Ifanorangebeadisthefourthbeadfromtheclasp,whichoneofthefollowingisapairthatcouldbethesecondandthirdbeads,respectively?(A)green,orange(B)green,red(C)purple,purple(D)yellow,green(E)yellow,purple4.有关空间分布的问题Ataneveningconcert,atotalofsixsongsO,P,T,X,Y,andZwillbeperformedbythreevocalistsGeorge,Helen,andLeslie.Thesongswillbesungconsecutivelyassolos,andeachwillbeperformedexactlyonce.Thefollowingconstraintsgovernthecompositionoftheconcertprogram:YmustbeperformedearlierthanTandearlierthanO.PmustbeperformedearlierthanZandlaterthanO.GeorgecanperformonlyX,Y,andZ.HelencanperformonlyT,P,andX.LesliecanperformonlyO,P,andX.Thevocalistwhoperformsfirstmustbedifferentfromthevocalistwhoperformslast.Question:*Whichoneofthefollowingisanacceptableschedulefortheperformanceofthesongs,inorderfromthefirsttolastsongperformed?(A)X,T,Y,O,P,Z(B)X,Z,Y,T,O,P(C)Y,O,P,X,T,Z(D)Y,P,O,Z,T,X(E)Y,X,O,P,Z,T*Whichoneofthefollowingmustbetrueabouttheprogram?(A)GeorgeperformsX.(B)HelenperformsO.(C)HelenperformsT.(D)LeslieperformsP.(E)LeslieperformsX.【解题技巧】1.在解答每一组问题时，将其作为一个单元。分析推理问题要求考生分析一组复杂的条件，并且在做该组试题时，将上述条件牢记在心。因此，要将每一组问题作为一个单元，并且尽量