GMAT逻辑推理试题.docx

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1、25Minutes16Questions1.    Inthefirsthalfofthisyear,fromJanuarytoJune,aboutthreemillionvideocassetterecordersweresold.Thisnumberisonly35percentofthetotalnumberofvideocassetterecorderssoldlastyear.Therefore,totalsalesofvideocassetterecorderswillalmostcertainlybelowerforthisyearthanthey

2、wereforlastyear.Whichofthefollowing,iftrue,mostseriouslyweakenstheconclusionabove?(A)Thetotalnumberofvideocassetterecorderssoldlastyearwaslowerthanthetotalnumbersoldintheyearbeforethat.(B)Mostpeoplewhoareinterestedinowningavideocassetterecorderhavealreadypurchasedone.(C)Videocassette

3、recordersarelessexpensivethisyearthantheywerelastyear.(D)Ofthevideocassetterecorderssoldlastyear,almost60percentweresoldinJanuary.(E)Typically,over70percentofthesalesofvideocassetterecordersmadeinayearoccurinthemonthsofNovemberandDecember.2.    Mudfromalakeonanuninhabitedwoodedisland

4、innorthernLakeSuperiorcontainstoxicchemicals,includingtoxaphene,abannedpesticideforcottonthatpreviouslywasmanufacturedandused,notinnearbyregionsofCanadaorthenorthernUnitedStates,butinthesouthernUnitedStates.Nodumpinghasoccurredontheisland.Theislandlakeissufficientlyelevatedthatwaterf

5、romLakeSuperiordoesnotreachit.Thestatementsabove,iftrue,moststronglysupportwhichofthefollowinghypotheses?(A)ThewatersoftheislandlakearemoreseverelypollutedthanthoseofLakeSuperior.(B)Thetoxaphenewascarriedtotheislandintheatmospherebywinds.(C)Banningchemicalssuchastoxaphenedoesnotaidth

6、enaturalenvironment.(D)Toxaphenehasadverseeffectsonhumanbeingsbutnotonotherorganisms.(E)Concentrationsoftoxapheneinthesoilofcotton-growingregionsarenotsufficientofbemeasurable.3.    LastyearintheUnitedStates,womenwhoranforstateandnationalofficeswereaboutaslikelytowinasmen.However,onl

7、yaboutfifteenpercentofthecandidatesfortheseofficeswerewomen.Therefore,thereasontherearesofewwomenwhowinelectionsfortheseofficesisnotthatwomenhavedifficultywinningelectionsbutthatsofewwomenwanttorun.Whichofthefollowing,iftrue,mostseriouslyunderminestheconclusiongiven?(A)Lastyearthepro

8、portionofwom