LSAT逻辑300题

逻辑300题~1~LSAT逻辑300题1.Beforetheprintingpress,bookscouldbepurchasedonlyinexpensivemanuscriptcopies.Theprintingpressproducedbooksthatweresignificantlylessexpensivethanthemanuscripteditions.Thepublic'sdemandforprintedbooksinthefirstyearsaftertheinventionoftheprintingpresswasmanytimesgreaterthandemandhadbeenformanuscriptcopies.Thisincreasedemonstratesthattherewasadramaticjumpinthenumberofpeoplewholearnedhowtoreadintheyearsafterpublishersfirststartedproducingbooksontheprintingpress.Whichoneofthefollowingstatements,iftrue,castsdoubtontheargument?2.Manyenvironmentalistshaveurgedenvironmentalawarenessonconsumers,sayingthatifweacceptmoralresponsibilityforoureffectsontheenvironment,thenproductsthatdirectlyorindirectlyharmtheenvironmentoughttobeavoided.Unfortunatelyitisusuallyimpossibleforconsumerstoassesstheenvironmentalimpactofaproduct,andthusimpossibleforthemtoconsciouslyrestricttheirpurchasestoenvironmentallybenignproducts.Becauseofthisimpossibilitytherecanbenomoraldutytochooseproductsinthewaytheseenvironmentalistsurge,since__.Whichoneofthefollowingprinciplesprovidesthemostappropriatecompletionfortheargument?3.Advertisement:Anyonewhoexercisesknowsfromfirsthandexperiencethatexerciseleadstobetterperformanceofsuchphysicalorgansastheheartandthelungs,aswellastoimprovementinmuscletone.Andsinceyourbrainisaphysicalorgan,youractionscanimproveitsperformance,too.Actnow.SubscribetoStimulus:readthemagazinethatexercisesyourbrain.Theadvertisementemployswhichoneofthefollowingargumentativestrategies?逻辑300题~2~4．Thecommercialnewsmediaemphasizeexceptionaleventssuchasairplanecrashesattheexpenseofthosesuchasautomobileaccidents,whichoccurfarmorefrequentlyandrepresentafargreaterrisktothepublic.Yetthepublictendstointerpretthedegreeofemphasisthenewsmediagivetotheseoccurrencesasindicatingthedegreeofrisktheyrepresent.Ifthestatementsabovearetrue,whichoneofthefollowingconclusionsismoststronglysupportedbythem?5．Alargegroupofhyperactivechildrenwhoseregulardietsincludedfoodcontaininglargeamountsofadditiveswasobservedbyresearcherstrainedtoassessthepresenceorabsenceofbehaviorproblems.Thechildrenwerethenplacedonalow-additivedietforseveralweeks,afterwhichtheywereobservedagain.Originallynearly60percentofthechildrenexhibitedbehaviorproblems;afterthechangeindiet,only30percentdidso.Onthebasisofthesedata,itcanbeconcludedthatfoodadditivescancontributetobehaviorproblemsinhyperactivechildren.Theevidencecitedfailstoestablishtheconclusionbecause6．Nomathematiciantodaywouldflatlyrefusetoaccepttheresultsofanenormouscomputationasanadequatedemonstrationofthetruthofatheorem.In1976,however,thiswasnotthecase.Somemathematiciansatthattimerefusedtoaccepttheresultsofacomplexcomputerdemonstrationofaverysimplemappingtheorem.Althoughsomemathematiciansstillholdastrongbeliefthatasimpletheoremoughttohaveashort,simpleproof,infact,somesimpletheoremshaverequiredenormousproofs.Ifallofthestatementsinthepassagearetrue,whichoneofthefollowingmustalsobetrue?7．Marinebiologistshadhypothesizedthatlobsters逻辑300题~3~kepttogetherinlobstertrapseatoneanotherinresponsetohunger.Periodiccheckingoflobstertraps,however,hasrevealedinstancesoflobsterssharingtrapstogetherforweeks.Eightlobstersevensharedonetraptogetherfortwomonthswithouteatingoneanother.Themarinebiologists'hypothesis,therefore,isclearlywrong.Theargumentagainstthemarinebiologists'hypothesisisbasedonwhichoneofthefollowingassumptions?8．EightyearsagohuntingwasbannedinGreenfieldCountyonthegroundsthathuntingendangerspublicsafety.Nowthedeerpopulationinthecountyissixtimeswhatitwasbeforetheban.Deerareinvadingresidentialareas,damagingpropertyandcausingmotorvehicleaccidentsthatresultinseriousinjurytomotorists.Sincetherewereneveranyhunting-relatedinjuriesinthecounty,clearlythebanwasnotonlyunnecessarybuthascreatedadangertopublicsafetythatwouldnototherwiseexist.Whichoneofthefollowing,iftrue,providesthestrongestadditionalsupportfortheconclusionabove?9．Cometsdonotgiveofftheirownlightbutreflectlightfromothersources,suchastheSun.Scientistsestimatethemassofcometsbytheirbrightness:thegreateracomet'smass,themorelightthatcometwillreflect.Asatelliteprobe,however,hasrevealedthatthematerialofwhichHalley'scometiscomposedreflects60timeslesslightperunitofmassthanhadbeenpreviouslythought.Thestatementsabove,iftrue,givethemostsupporttowhichoneofthefollowing?10．Officemanager:Iwillnotorderrecycledpaperforthisoffice.Ourletterstoclientsmustmakeagoodimpression,sowecannotprintthemoninferiorpaper.Stationerysupplier:Recycledpaperisnotnecessarilyinferior.Infact,fromthebeginning,thefinest逻辑300题~4~paperhasbeenmadeofrecycledmaterial.Itwasonlyinthe1850sthatpaperbegantobemadefromwoodfiber,andthenonlybecausetherewerenolongerenoughragstomeetthedemandforpaper.Inwhichoneofthefollowingwaysdoesthestationer'sresponsefailtoaddresstheofficemanager'sobjectiontorecycledpaper?11．Theinitialcausesofseriousaccidentsatnuclearpowerplantshavenotsofarbeenflawsintheadvanced-technologyportionoftheplants.Rather,theinitialcauseshavebeenattributedtohumanerror,aswhenaworkerattheBrownsMillsreactorintheUnited