gmat逻辑分类 旧prep2加强题目.docx

gmat逻辑分类 旧prep2加强题目.docx

《gmat逻辑分类 旧prep2加强题目.docx》由会员分享，可在线阅读，更多相关《gmat逻辑分类 旧prep2加强题目.docx（7页珍藏版）》请在冰豆网上搜索。

gmat逻辑分类旧prep2加强题目

18.（26912-!

-item-!

-188;#058&003382）

TheCalexTelecommunicationsCompanyisplanningtointroducecellulartelephoneserviceintoisolatedcoastalareasofCaladia,amovewhichwillrequireconsiderableinvestment.However,theonlysignificanteconomicactivityintheseareasissmall-scalecoffeefarming,andnoneofthecoffeefarmersmakeenoughmoneytoaffordthemonthlyservicefeesthatCalexwouldhavetochargetomakeaprofit.Nevertheless,Calexcontendsthatmakingtheserviceavailabletothesefarmerswillbeprofitable.

Whichofthefollowing,iftrue,providesthestrongestsupportforCalex'scontention?

（A）Currently,Caladiancoffeefarmersareforcedtoselltheircoffeetolocalbuyersatwhateverpricethosebuyerschoosetopaybecausethefarmersareunabletoremainincontactwithoutsidebuyerswhogenerallyofferhigherprices.

（B）InthecoastalareasofCaladiawhereCalexproposestointroducecellulartelephoneservice,thereiscurrentlynofixed-linetelephoneservicebecausefixed-linecompaniesdonotbelievethattheycouldrecouptheirinvestment.

（C）Acellulartelephonecompanycanbreakevenwithaconsiderablysmallernumberofsubscribersthanafixed-linecompanycan,eveninareassuchastheCaladiancoast,wherethereisnodifficultterraintodriveupthecostsofinstallingfixedlines.

（D）Calexbasesitsmonthlyfeesforcellulartelephoneserviceinagivenregionpartlyonthecostofinstallingthenecessaryequipmenttoprovidetheservicethere.

（E）CalexhasforyearsmadeaprofitoncellulartelephoneserviceinCaladia'scapitalcity,whichisnotfarfromthecoastalregion.

21.（28114-!

-item-!

-188;#058&003832）

FilmDirector:

ItistruethatcertaincharactersandplottwistsinmynewlyreleasedfilmTheBigHeistarestrikinglysimilartocharactersandplottwistsinThieves,amoviethatcameoutlastyear.Basedonthesesimilarities,thefilmstudiothatproducedThievesisnowaccusingmeoftakingideasfromthatfilm.Theaccusationisclearlywithoutmerit.AllproductionworkonTheBigHeistwasactuallycompletedmonthsbeforeThieveswasreleased.

Whichofthefollowing,iftrue,providesthestrongestsupportforthedirector'srejectionoftheaccusation?

（A）BeforeThievesbeganproduction,itsscripthadbeencirculatingforseveralyearsamongvariousfilmstudios,includingthestudiothatproducedTheBigHeist.

（B）Thecharactersandplottwiststhataremostsimilarinthetwofilmshavecloseparallelsinmanyearlierfilmsofthesamegenre.

（C）ThefilmstudiothatproducedThievesseldomproducesfilmsinthisgenre.

（D）ThedirectorofThievesworkedwiththedirectorofTheBigHeistonseveralearlierprojects.

（E）ThetimeittooktoproduceTheBigHeistwasconsiderablyshorterthanthetimeittooktoproduceThieves.

24.（28903-!

-item-!

-188;#058&004064）

Althoughexposuretoasbestosistheprimarycauseofmesothelioma,aslow-developingcancer,researchersbelievethatinfectionbytheSV40virusisacontributingcause,sinceintheUnitedStates60percentoftissuesamplesfrommesotheliomas,butnonefromhealthytissue,containSV40.SV40isamonkeyvirus;however,in1960somepoliovaccinewascontaminatedwiththevirus.Researchershypothesizethatthisvaccinewasthesourceofthevirusfoundinmesotheliomasdecadeslater.

Whichofthefollowing,iftrue,moststronglysupportstheresearchers'hypothesis?

（A）SV40iswidelyusedasaresearchtoolincancerlaboratories.

（B）ChangesinthetechniqueofmanufacturingthevaccinenowpreventcontaminationwithSV40.

（C）Recentlydiscoveredsamplesofthevaccinedatingfrom1960stillshowtracesofthevirus.

（D）Inasmallpercentageofcasesofmesothelioma,thereisnohistoryofexposuretoasbestos.

（E）InFinland,wherethepoliovaccinewasnevercontaminated,samplesfrommesotheliomasdonotcontainSV40.

25.（30469-!

-item-!

-188;#058&005456）

InthepastyearHarborvillehashadanunusuallyhighrateofnewcasesofacertaindisease.AninvestigationrevealedthatoverthepastfiveyearsHarborville'spublicwatersupplyhashadahighlevelofpollutants.MedicalresearchershavehypothesizedthatHarborville'swaterisresponsibleforthehighrateofnewcasesofthedisease.

Eachofthefollowing,iftrue,providesadditionalsupportfortheresearchers'hypothesisEXCEPT:

（A）MostofthepeopleafflictedwithnewcasesofthediseasehadregularlydrunklargerquantitiesofHarborville'swaterthanhadotherHarborvilleresidents.

（B）ThesametypeofpollutantsthatwerefoundinHarborville'swaterhaveindependentlybeenlinkedtooccurrencesinothertownsofhighratesofthedisease.

（C）SomeofthepeoplewithnewlydiagnosedcasesofthediseasebegantodevelopthediseasebeforeHarborville'swaterbecamepolluted.

（D）TherateofnewcasesofthediseaseamongresidentsofHarborvillewhogettheirwaterfromprivatesourcesisnotunusuallyhigh.

（E）TownswithgeographicanddemographiccharacteristicssimilartothoseofHarborvillebutwithoutpollutedwaterdonothaveashigharateofthediseaseasdoesHarborville.

26.（30517-!

-item-!

-188;#058&005463）

AnewcommercialradiostationinGreenfieldplanstoplaysongsthatwerepopularhitsfifteentotwenty-fiveyearsago.Ithopesinthiswaytoattractanaudiencemadeupmainlyofpeoplebetweenthirty-fiveandforty-fiveyearsoldandtherebytohaveastrongmarketappealtoadvertisers.

Eachofthefollowing,iftrue,strengthenstheprospectsthattheradiostation'splanwillsucceedEXCEPT:

（A）Peopletendtoremainveryfondofthemusicthattheyheardwhentheywereintheirteensandearlytwenties.

（B）InanumberofcitiesdemographicallysimilartoGreenfield,radiostationsthatplayrecordingsofpopularmusicfromfifteentotwenty-fiveyearsagohavesucceededcommercially.

（C）Peopleinthethirty-five-toforty-five-year-oldagegrouparemorelikelytolistentotheradiofornewsthanformusic.

（D）Thethirty-five-toforty-five-year-oldagegroupisoneinwhichpeopletendtohavecomparativelyhighlevelsofincomeandareinvolvedinmakinghouseholdpurchases.

（E）AmongthefewradiostationsintheGreenfieldarea,thereisnonethatplaysmusicfromthisparticularperiodformorethanafewhoursperweek.

37.（32151-!

-item-!

-188;#058&006653）

Theuseofradardetectorsincommercialvehicleswasbannedbecausecommercialtruckandbusdriverswereusingthesedevicestodrivefasterthanthepostedspeedlimitwithoutfearofarrest.Sincedriversofnoncommercialvehiclesalsouseradardetectorsandsincespeedingdecreasessafetyforanyvehicle,useofradardetectorsshouldalsobebannedinnoncommercialvehiclestoincreasesafety.

Whichofthefollowing,iftrue,moststronglysupportstheargumentabove?

（A）Theaveragenoncommercial-vehicledriverisinvolvedinlesslong-distancedrivingthanistheaveragecommercial-vehicledriver.

（B）Inmanyplacesairplanesorhelicoptersareusedratherthanradartolocatevehiclestravelingfasterthanthepostedspeedlimit.

（C）Thebanonradardetectorsincommercialvehicleshasbeeneffectiveindeterringthemfromspeeding.

（D）Trafficaccidentsinvolvingatruckorbusgenerallyposeagreaterthreatofinjuryordeaththandootheraccidents.

（E）Radardetectorsaresometimessetoffbydevicesotherthanthelawenforcementdevicesthattheradardetectorswerebuilttodetect.

43.（32991-!

-item-!

-188;#058&007555）

Halfofthesubjectsinanexperiment--theexperimentalgroup--consumedlargequantitiesofapopularartificialsweetener.Afterward,thisgroupshowedlowercognitiveabilitiesthandidtheotherhalfofthesubjects--thecontrolgroup--whodidnotconsumethesweetener.Thedetrimentaleffectswereattributedtoanaminoacidthatisoneofthesweetener'sprincipalconstituents.

Whichofthefollowing,iftrue,wouldbestsupporttheconclusionthatsomeingredientofthesweetenerwasresponsiblefortheexperimentalresults?

（A）Mostconsumersofthesweetenerdonotconsumeasmuchofitastheexperimentalgroupmembersdid.

（B）Theaminoacidreferredtointheconclusionisacomponentofallproteins,someofwhichmustbeconsumedforadequatenutrition.

（C）Thequantityofthesweetenerconsumedbyindividualsintheexperimentalgroupisconsideredsafebyfederalfoodregulators.

（D）Thetwogroupsofsubjectswereevenlymatchedwithregardtocognitiveabilitiespriortotheexperiment.

（E）Asecondexperimentinwhichsubjectsconsumedlargequantitiesofthesweetenerlackedacontrolgroupofsubjectswhowerenotgiventhesweetener.

51.（33375-!

-item-!

-188;#058&007573）

Becausepostageratesarerising,HomeDecoratormagazineplanstomaximizeitsprofitsbyreducingbyonehalfthenumberofissuesitpublisheseachyear.Thequalityofarticles,thenumberofarticlespublishedperyear,andthesubscriptionpricewillnotchange.Marketresearchshowsthatneithersubscribersnoradvertiserswillbelostifthemagazine'splanisinstituted.

Whichofthefollowing,iftrue,providesthestrongestevidencethatthemagazine'sprofitsarelikelytodeclineiftheplanisinstituted?

（A）Withthenewpostagerates,atypicalissueundertheproposedplanwouldcostaboutone-thirdmoretomailthanatypicalcurrentissuewould.

（B）Themajorityofthemagazine'ssubscribersarelessconcernedaboutapossiblereductioninthequantityofthemagazine'sarticlesthanaboutapossiblelossofthecurrenthighqualityofitsarticles.

（C）Manyofthemagazine'slong-timesubscriberswouldcontinuetheirsubscriptionsevenifthesubscriptionpricewereincreased.

（D）Mostoftheadvertisersthatpurchaseadvertisingspaceinthemagazinewillcontinuetospen