gmat逻辑分类 旧prep2加强题目.docx
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gmat逻辑分类 旧prep2加强题目.docx
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gmat逻辑分类旧prep2加强题目
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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.
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FilmDirector:
ItistruethatcertaincharactersandplottwistsinmynewlyreleasedfilmTheBigHeistarestrikinglysimilartocharactersandplottwistsinThieves,amoviethatcameoutlastyear.Basedonthesesimilarities,thefilmstudiothatproducedThievesisnowaccusingmeoftakingideasfromthatfilm.Theaccusationisclearlywithoutmerit.AllproductionworkonTheBigHeistwasactuallycompletedmonthsbeforeThieveswasreleased.
Whichofthefollowing,iftrue,providesthestrongestsupportforthedirector'srejectionoftheaccusation?
(A)BeforeThievesbeganproduction,itsscripthadbeencirculatingforseveralyearsamongvariousfilmstudios,includingthestudiothatproducedTheBigHeist.
(B)Thecharactersandplottwiststhataremostsimilarinthetwofilmshavecloseparallelsinmanyearlierfilmsofthesamegenre.
(C)ThefilmstudiothatproducedThievesseldomproducesfilmsinthisgenre.
(D)ThedirectorofThievesworkedwiththedirectorofTheBigHeistonseveralearlierprojects.
(E)ThetimeittooktoproduceTheBigHeistwasconsiderablyshorterthanthetimeittooktoproduceThieves.
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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.
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InthepastyearHarborvillehashadanunusuallyhighrateofnewcasesofacertaindisease.AninvestigationrevealedthatoverthepastfiveyearsHarborville'spublicwatersupplyhashadahighlevelofpollutants.MedicalresearchershavehypothesizedthatHarborville'swaterisresponsibleforthehighrateofnewcasesofthedisease.
Eachofthefollowing,iftrue,providesadditionalsupportfortheresearchers'hypothesisEXCEPT:
(A)MostofthepeopleafflictedwithnewcasesofthediseasehadregularlydrunklargerquantitiesofHarborville'swaterthanhadotherHarborvilleresidents.
(B)ThesametypeofpollutantsthatwerefoundinHarborville'swaterhaveindependentlybeenlinkedtooccurrencesinothertownsofhighratesofthedisease.
(C)SomeofthepeoplewithnewlydiagnosedcasesofthediseasebegantodevelopthediseasebeforeHarborville'swaterbecamepolluted.
(D)TherateofnewcasesofthediseaseamongresidentsofHarborvillewhogettheirwaterfromprivatesourcesisnotunusuallyhigh.
(E)TownswithgeographicanddemographiccharacteristicssimilartothoseofHarborvillebutwithoutpollutedwaterdonothaveashigharateofthediseaseasdoesHarborville.
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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.
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Theuseofradardetectorsincommercialvehicleswasbannedbecausecommercialtruckandbusdriverswereusingthesedevicestodrivefasterthanthepostedspeedlimitwithoutfearofarrest.Sincedriversofnoncommercialvehiclesalsouseradardetectorsandsincespeedingdecreasessafetyforanyvehicle,useofradardetectorsshouldalsobebannedinnoncommercialvehiclestoincreasesafety.
Whichofthefollowing,iftrue,moststronglysupportstheargumentabove?
(A)Theaveragenoncommercial-vehicledriverisinvolvedinlesslong-distancedrivingthanistheaveragecommercial-vehicledriver.
(B)Inmanyplacesairplanesorhelicoptersareusedratherthanradartolocatevehiclestravelingfasterthanthepostedspeedlimit.
(C)Thebanonradardetectorsincommercialvehicleshasbeeneffectiveindeterringthemfromspeeding.
(D)Trafficaccidentsinvolvingatruckorbusgenerallyposeagreaterthreatofinjuryordeaththandootheraccidents.
(E)Radardetectorsaresometimessetoffbydevicesotherthanthelawenforcementdevicesthattheradardetectorswerebuilttodetect.
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Halfofthesubjectsinanexperiment--theexperimentalgroup--consumedlargequantitiesofapopularartificialsweetener.Afterward,thisgroupshowedlowercognitiveabilitiesthandidtheotherhalfofthesubjects--thecontrolgroup--whodidnotconsumethesweetener.Thedetrimentaleffectswereattributedtoanaminoacidthatisoneofthesweetener'sprincipalconstituents.
Whichofthefollowing,iftrue,wouldbestsupporttheconclusionthatsomeingredientofthesweetenerwasresponsiblefortheexperimentalresults?
(A)Mostconsumersofthesweetenerdonotconsumeasmuchofitastheexperimentalgroupmembersdid.
(B)Theaminoacidreferredtointheconclusionisacomponentofallproteins,someofwhichmustbeconsumedforadequatenutrition.
(C)Thequantityofthesweetenerconsumedbyindividualsintheexperimentalgroupisconsideredsafebyfederalfoodregulators.
(D)Thetwogroupsofsubjectswereevenlymatchedwithregardtocognitiveabilitiespriortotheexperiment.
(E)Asecondexperimentinwhichsubjectsconsumedlargequantitiesofthesweetenerlackedacontrolgroupofsubjectswhowerenotgiventhesweetener.
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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
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