2023年研究生类研究生管理科学入学考试(GMAT)参考历年高频考题带答案难题附详解

2023年研究生类研究生管理科学入学考试(GMAT)参考历年高频考题带答案难题附详解（图片大小可自由调整）第1卷一.历年考点试题黑钻版(共50题)1.Asteadydeclineinannualmovie-ticketsalesisabouttobegin.Morethanhalfoftheticketssoldlastyearweresoldtotheagegroupundertwenty-fiveyearsofage,representingtwenty-sevenpercentofthepopulation.However,thenumberofindividualsundertwenty-fivewillsteadilydeclineduringthenextdecade.

Whichofthefollowing,iftrue,castsmostdoubtonthepredictionaboveregardingfuturemovie-ticketsales?A.Medicaladvanceshaveloweredthemortalityratesforthosewhoarefortytosixtyyearsofage.B.Manypeoplegraduallyloseinterestingoingtothemoviesaftertheyreachtwenty-fiveyearsofage.C.Thenumberofmovietheatershasbeenincreasing,andthistrendisexpectedtocontinueduringthenexttenyears.D.Movie-ticketsalestendtoincreaseasthesizeoftheworkforceincreases,andthesizeoftheworkforcewillincreaseannuallyduringthenextdecade.E.Expertsagreethatpeopleundertwenty-fiveyearsofagewillcontinuetoaccountformorethanhalfofthetotalnumberofticketssoldineachofthenexttenyears.2.Usingfossilenergymoreefficientlyisintheinterestofthenationandtheglobalenvironment,butmajorimprovementsareunlikelyunlessproposedgovernmentstandardsareimplementedtoeliminateproductsorpracticesthatareamongtheleastefficientintheirclass.

Objection:Decisionsonenergyusearebestlefttotheoperationofthemarket.

Whichoneofthefollowing,iftrue,mostdirectlyunderminestheobjectionabove?A.Itwouldbeunrealistictoexpectsocietytomakethechangesnecessarytoachievemaximumenergyefficiencyallatonce.B.Thereareproducts,suchasautomobiles,thatconsumeenergyatasufficientratethatpersonswhopurchaseandusethemwillbecomeconsciousofanyunusualenergyinefficiencyincomparisonwithotherproductsinthesameclass.C.Wheneveranewmodeofgeneratingenergy,suchasamewfuel,isintroduced,anumberofsupportsystems,suchasafuel-distributionsystem,mustbecreatedoradapted.D.Whenenergypricesrise,consumersofenergytendtolookfornewwaystoincreaseenergyefficiency,suchasbyaddinginsulationtotheirhouses.E.Oftenthepurchaserofaproduct,suchasalandlordbuyinganappliance,choosesonthebasisofpurchasepricebecausethepurchaserisnotthepersonwhowillpayforenergyusedbytheproduct.3.Automotiveaccidentsareoneoftheleadingcausesofdeathinchildren.Childsafetyadvocatesarguethatharshpenaltiesshouldbeimposedondriverswhofailtoplacechildrenunder30poundsinrear-facingchildren'sseatsintherearofthecarwheneveracarisinmotion.Suchpenalties,theyargue,willhelpsavechildren'slives.

Allofthefollowingstatementssupporttheargumentofthechildsafetyadvocates

EXCEPT:A.Therearseatsofacararesaferforallpassengers,bothadultsandchildren,intheeventofanaccident.B.Studieshaveshownthatchildreninrear-facingseatshavebeenshowntosustainlessseriousinjuriesinaccidentsthanchildreninfront-facingseats.C.Studieshaveshownthatchildrenunder30poundscansustainseriousinjuriesinevenminoraccidentsiftheyarenotproperlyrestrained.D.Studieshaveshownthatchildrenbetween60and90poundsaresafestinacarwhenusingbothaseatbeltandaproperlysizedboosterseat.E.Somedriverswillnotabidebyregulationsunlesstheyareforcedtodosobythethreatofharshpenalties.4.Question5isbasedonthefollowinggraph.

DrugX,whichkillsoncontactthebacteriathatcausetheinfection,isadministeredtopatientsbymeansofanaerosolinhaler.

Whichofthefollowing,iftrue,contributesmosttoexplainingthechangeindrugX'seffectivenessduringthecourseoftheinfection?A.Symptomsoftheinfectionusuallybecomeevidentduringthefirst48hoursfollowinginfection.B.Mostpatientswithlunginfectionssaytheypreferaerosolinhalerstoothermeansofadministeringantibacterialdrugs.C.InmostpatientstakingdrugX,thedosageadministeredisincreasedslightlyeachweekuntilsymptomsdisappear.D.Inpatientswhohavetheinfection,theabilitytoinhalebecomesincreasinglyimpairedbeginninginthesecondweekaftertheonsetofsymptoms.E.DrugXisnotadministeredtoanypatientwhoshowssignsofsufferingfromsecondaryinfections.5.TheOrganizationofPetroleumExportingCountries(OPEC)hadlongbeenexpectedtoannounceareductioninoutputtobolstersaggingoilprices,butofficialsoftheorganizationjustrecentlyannouncedthatthegroupwillparedailyproductionby1.5millionbarrelsbythebeginningofnextyear,butonlyifnon-OPECnations,includingNorway,Mexico,andRussia,weretotrimoutputbyatotalof500,000barrelsaday.A.year,butonlyifnon-OPECnations,includingNorway,Mexico,andRussia,weretotrimoutputB.year,butonlyiftheoutputofnon-OPECnations,whichincludesNorway,Mexico,andRussia,istrimmedC.yearonlyiftheoutputofnon-OPECnations,includingNorway,Mexico,andRussia,wouldbetrimmedD.yearonlyifnon-OPECnations,whichincludesNorway,Mexico,andRussia,weretrimmingoutputE.yearonlyifnon-OPECnations,includingNorway,Mexico,andRussia,trimoutput6.Generallyscientistsentertheirfieldwiththegoalofdoingimportantnewresearchandacceptastheircolleaguesthosewithsimilarmotivation.Therefore,whenanyscientistwinsrenownasanexpounderofsciencetogeneralaudiences,mostotherscientistsconcludethatthispopularizershouldnolongerberegardedasatruecolleague.

TheexplanationofferedaboveforthelowesteeminwhichscientificpopularizersfireheldbyresearchscientistsassumesthatA.seriousscientificresearchisnotasolitaryactivity,butreliesonactivecooperationamongagroupofcolleaguesB.researchscientiststendnottoregardascolleaguesthosescientistswhoserenowntheyenvyC.ascientistcanbecomeafamouspopularizerwithouthavingcompletedanyimportantresearchD.researchscientistsbelievethatthosewhoarewellknownaspopularizersofsciencearenotmotivatedtodoimportantnewresearchE.noimportantnewresearchcanbeaccessibletooraccuratelyassessedbythosewhoarenotthemselvesscientists7.Awarehousehadasquarefloorwitharea10,000squaremeters.Arectangularadditionwasbuiltalongoneentiresideofthewarehousethatincreasedthefloorareabyon-halfasmuchastheoriginalfloorare-a.Howmanymetersdidtheadditionextendbeyondtheoriginalbuilding?A.10B.20C.50D.200E.5008.Agroupofpaintingsmadeapproximately15,000yearsagoinacaveintheLoireRivervalleyinwhatisnowFrancedepictsanumberofdifferentanimals.Oneoftheanimalsdepictedseemstoresemblethechiru,arareantelopeoftheHimalayas.

Whichofthefollowing,iftrue,bestsupportsthehypothesisthatinpaintingtheanimalthatresemblesachiruthecaveartistpaintedachiruwithwhichsheorhewasfamiliar?A.Therearenumerousrepresentationsofimaginaryanimalsincavepaintingsofsimilarage.B.Fossilizedremainsofachiru,approximately16,000yearsold,havebeenfoundatthenorthernendofthevalley.C.Thecavethatcontainsthedepictionofananimalthatresemblesachirucontainsstylizedrepresentationsofplantlife.D.Oldercavesfromthesameregioncontainnorepresentationsofanimalsthatresembleachiru.E.TheantlersoftheanimalinthepaintingarelongerthanthoseofthematureHimalayanchiru.9.Armtech,atemporary-employmentagency,previouslygaveitsemployees2.5paidvacationdaysaftereach700hoursworked.Armtech'snewpolicyistogiveitsemployees5.0paidvacationdaysaftereach1,200hoursworked.Therefore,thisnewpolicyismoregeneroustoArmtechemployeesingivingthemmorevacationdaysperhourworkedthantheoldpolicydid.

Whichofthefollowingisanassumptiononwhichtheargumentdepends?A.MostcurrentArmtechemployeesapproveofthecompany'snewvacationpolicy.B.AfewArmtechemployeesleavethecompanybeforehavingworked700hours.C.MostArmtechemployeeswerenotawarethatthecompanyplannedtochangeitsvacationpolicyuntilafterithadalreadydoneso.D.AsignificantportionofArmtechemployeesstaywiththecompanylongenoughtoworkfor1,200hours.E.Armtech'snewvacationpolicycloselymatchesthevacationpoliciesofcompetingtemporaryemploymentagencies.10.Shanna:Ownersofanyworkofart,simplybyvirtueofownership,ethicallyhavetherighttodestroythatartworkiftheyfinditmorallyoraestheticallydistasteful,orifcaringforitbecomesinconvenient.

Jorge:Ownershipofuniqueartworks,unlikeownershipofotherkindsofobjectscarriesthemoralrighttopossessbutnottodestroy.Auniqueworkofartwithaestheticorhistoricalvaluebelongstoposterityandsomustbepreserved,whateverthepersonalwishesofitslegalowner.

Onthebasisoftheirstatements,ShannaandJorgearecommittedtodisagreeingaboutthetruthofwhichoneofthefollowingstatements?A.Anyonewhoownsaportraitpresentinghisorherfatherinanunflatteringlightwouldforthatreasonalonebeethicallyjustifiedindestroyingit.B.Peoplewhoownaestheticallyvaluableworksofarthavenomoralobligationtomakethemavailableforpublicviewing.C.Valuablepaintingsbywell-knownartistsareseldomintentionallydamagedordestroyedbytheirowners.D.Ifapieceofsculptureisnotunique,itsownerhasnoethicalobligationtopreserveitifdoingsoprovesburdensome.E.Itislegallypermissibleforauniqueandhistoricallyvaluablemuraltobedestroyedbyitsownerifheorshetiresofit.11.

Basedontheratesabove,howmuchwouldCompanyXchargeacustomerwithalow-usecontractforusing95messageunitsinamonth?A.$9.30B.$11.30C.$12.88D.$14.88E.$16.1812.Ofthesciencebooksinacertainsupplyroom,50areonbotany,65areonzoology,90areonphysics,50areongeology,

and110areonchemistry.Ifsciencebooksareremovedrandomlyfromthesupplyroom,howmanymustberemovedtoensurethat80ofthebooksremovedareonthesamescience?A.81B.159C.166D.285E.32413.Jim'sTaxiServicechargesaninitialfeeof$2.25atthebeginningofatripandanadditionalchargeof$0.35foreach2/5ofamiletraveled.Whatisthetotalchargeforatripof3.6miles?A.$3.15B.$4.45C.$4.80D.$5.O5E.$5.4O14.IfPatboughtatennisshirtwithmatchingshorts,whatwasthecostoftheshirt?

(1)Thetotalcostoftheshirtandshortswas$20.

(2)Theratioofthecostoftheshirttothecostoftheshortswas2:3.A.条件(1)充分，但条件(2)不充分．B.条件(2)充分，但条件(1)不充分．C.条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．D.条件(1)充分，条件(2)也充分．E.条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．15.Cloudsareformedfromtheevaporationoftheoceans'waterthatiswarmedbythesunandriseshighintotheatmosphere,condensingintinydropletsonminuteparticlesofdust.A.Cloudsareformedfromtheevaporationoftheoceans'waterthatiswarmedbythesunandriseshighintotheatmosphere,condensingintinydropletsonminuteparticlesofdust.B.Cloudsformbythesun'swarmthevaporatingthewaterintheoceans,whichriseshighintotheatmosphere,condensingintinydropletsonminuteparticlesofdust.C.Warmedbythesun,oceanwaterevaporates,riseshighintotheatmosphere,andcondensesintinydropletsonminuteparticlesofdusttoformclouds.D.Thewaterintheoceansevaporates,warmedbythesun,riseshighintotheatmosphere,andcondensesintinydropletsonminuteparticlesofdust,whichformsclouds.E.Oceanwater,warmedbythesun,evaporatesandriseshighintotheatmosphere,whichthencondensesintinydropletsonminuteparticlesofdusttoformasclouds.16.Researcherstookagroupofteenagerswhohadneversmokedandforoneyeartrackedwhethertheytookupsmokingandhowtheirmentalhealthchanged.Thosewhobegansmokingwithinamonthofthestudy'sstartwerefourtimesaslikelytobedepressedatthestudy'sendthanthosewhodidnotbeginsmoking.Sincenicotineincigaretteschangesbrainchemistry,perhapstherebyaffectingmood,itislikelythatsmokingcontributestodepressioninteenagers.

Whichofthefollowing,iftrue,moststrengthenstheargument?______A.Participantswhoweredepressedatthestudy'sstartwerenomorelikelytobesmokersatthestudy'sendthanthosewhowerenotdepressed.B.Participantswhobegansmokingwithinamonthofthestudy'sstartwerenomorelikelythanthosewhobeganmidwaythroughtohavequitsmokingbythestudy'send.C.Few,ifany,oftheparticipantsinthestudywerefriendsorrelativesofotherparticipants.D.Someparticipantsenteredandemergedfromaperiodofdepressionwithintheyearofthestudy.E.Theresearchersdidnottrackuseofalcoholbytheteenagers.17.

WhatarethecoordinatesofpointBinthexy-planeabove?A.(6,12)B.(6,28)C.(8,20)D.(12,20)E.(14,28)18.Aproductthatrepresentsacleartechnologicaladvanceovercompetingproductscangenerallycommandahighprice.Becausetechnologicaladvancestendtobequicklysurpassedandcompanieswhowanttomakelargeprofitswhiletheystillcan,manycompanieschargethegreatestpricethemarketwillbearwhentheyhavesuchaproduct.Butlargeprofitsonthenewproductwillgivecompetitorsastrongincentivetoquicklymatchthenewproduct'scapabilities.Consequently,thestrategytomaximizeoverallprofitfromanewproductistochargelessthanthegreatestpossibleprice.

Intheargumentabove,thetwoportionsinboldfaceplaywhichofthefollowingroles?______A.Thefirstisanassumptionthatformsthebasisforacourseofactionthattheargumentcriticizes;thesecondpresentsthecourseofactionendorsedbytheargument.B.Thefirstisaconsiderationraisedtoexplaintheappealofacertainstrategy;thesecondisaconsiderationraisedtocallintoquestionthewisdomofadoptingthatstrategy.C.Thefirstisanassumptionthathasbeenusedtojustifyacertainstrategy;thesecondisaconsiderationthatisusedtocastdoubtonthatassumption.D.Thefirstisaconsiderationraisedinsupportofastrategytheargumentendorses;thesecondpresentsgroundsinsupportofthatconsideration.E.Thefirstisaconsiderationraisedtoshowthatadoptingacertainstrategyisunlikelytoachievetheintendedeffect;thesecondispresentedtoexplaintheappealofthatstrategy.19.Underhighpressureandintenseheat,graphite,themoststableformofpurecarbon,changesintothesubstancecommonlyreferredtoasdiamondandremainingthiswaywhetherornottheheatandpressureareremoved.A.remainingthiswaywhetherornotB.remaininglikethatevenasC.remainingassuchwhetherornotD.remainsinthiswayalthoughE.remainsthusevenwhen20.Acertaintheaterhas100balconyseats.Forevery$2increaseinthepriceofabalconyseatabove$10,5fewerseatswillbesold.Ifa11thebalconyseatsaresoldwhenthepriceofeachseatis$10,whichofthefollowingcouldbethepriceofabalconyseatiftherevenuefromthesaleofbalconyseatsis$1,360?A.$12B.$14C.$16D.$17E.$1821.Whichofthefollowing,iftrue,bestreconcilesthediscrepancybetweentheincreaseinunemploymentandtheincreaseinjobsinthemanufacturingindustryofAlameda?A.Manyproductsthatcontainmicroelectroniccomponentsarenowassembledcompletelybymachine.B.Workersinvolvedinthevariousaspectsofthemanufacturingprocessesthatusemicroelectronictechnologyneedextensivetraining.C.Itisdifficulttoevaluatenumericallywhatimpactonjobsecuritytheintroductionofmicroelectronicsintheworkplacehadbefore1979.D.In1990over90percentofthejobsinAlameda'smanufacturingcompanieswerefilledbyworkerswhomovedtoAlamedabecausetheyhadskillsforwhichtherewasnodemandinAlamedapriortotheintroductionofmicroelectronicsthere.E.ManyworkerswhohaveretiredfromthemanufacturingindustryinAlamedasince1979havenotbeenreplacedbyyoungerworkers.22.23.Ifyisanoddinteger,whichofthefollowingmustbeaneveninteger?A.y+2B.y+6C.2y-1D.3yE.3y+124.NoonecanbelicensedasanelectricianinParkerCountywithoutfirstcompletingacertaincourseinelectricalsafetyprocedures.AllstudentsmajoringincomputertechnologyatParkerCountyTechnicalCollegemustcompletethatcoursebeforegraduating.Therefore,anyofthecollege'sgraduatesincomputertechnologycanbelicensedasanelectricianinParkerCounty.

Theanswertowhichofthefollowingwouldbemosthelpfulinevaluatingtheargument?A.IsacollegedegreearequirementforbeinglicensedasanelectricianinParkerCounty?B.DoallstudentsmajoringincomputertechnologywhocompletethecourseinelectricalsafetyproceduresatParkerCountyTechnicalCollegeeventuallygraduate?C.IscompletionofacourseinelectricalsafetyprocedurestheonlywayapersonlicensedasanelectricianinParkerCountycanhavelearnedthoseprocedures?D.IsaperiodofpracticalapprenticeshiparequirementforbecomingalicensedelectricianinParkerCountybutnotforgraduatingfromthecollegeincomputertechnology?E.DoanyofthestudentsatParkerCountyTechnicalCollegewhoarenotmajoringincomputertechnologytakethecourseinelectricalsafetyprocedures?25.Whichofthefollowingmostlogicallycompletesthepassage?

Appendicitis(inflammationoftheappendix)ispotentiallyfatal;consequently,patientswithsymptomsstronglysuggestingappendicitisalmostalwayshavetheirappendixremoved.Theappropriatesurgeryislow-riskbutperformedunnecessarilyinabout20percentofallcases.Anewlydevelopedinternalscanforappendicitisishighlyaccurate,producingtwomisdiagnosesforevery98correctdiagnoses.Clearly,usingthistest,doctorscanlargelyavoidunnecessaryremovalsoftheappendixwithout,however,performinganyfewernecessaryonesthanbefore,since______.A.thepatientswhoarecorrectlydiagnosedwiththistestasnothavingappendicitisinvariablyhavemedicalconditionsthataremuchlessseriousthanappendicitisB.themisdiagnosesproducedbythistestarealwaysinstancesofattributingappendicitistosomeonewhodoesnot,infact,haveitC.allofthepatientswhoarediagnosedwiththistestashavingappendicitisdo,infact,haveappendicitisD.everypatientwhoisdiagnosedwiththistestashavingappendicitishasmorethanoneofthesymptomsgenerallyassociatedwithappendicitisE.theonlypatientswhoaremisdiagnosedusingthistestarepatientswholackoneormoreofthesymptomsthataregenerallyassociatedwithappendicitis26.Thegyrfalcon,anArcticbirdofprey,hassurvivedaclosebrushwithextinction;itsnumbersarenowfivetimesgreaterthanwhentheuseofDDTwassharplyrestrictedintheearly1970's.A.extinction;itsnumbersarenowfivetimesgreaterthanB.extinction;itsnumbersarenowfivetimesmorethanC.extinction,theirnumbersnowfivefoldwhattheywereD.extinction,nowwithfivefoldthenumberstheyhadE.extinction,nowwithnumbersfivetimesgreaterthan27.Inresponsetoviralinfection,theimmunesystemsofmicetypicallyproduceantibodiesthatdestroythevirusbybindingtoproteinsonitssurface.Miceinfectedwiththeherpesvirusgenerallydevelopkeratitis,adegenerativediseaseaffectingpartoftheeye.Sinceproteinsonthesurfaceofcellsinthispartoftheeyecloselyresemblethoseontheherpesvirussurface,scientistshypothesizethatthesecasesofkeratitisarecausedbyantibodiestotheherpesvirus.

Whichofthefollowing,iftrue,mosthelpstosupportthescientists'reasoning?A.Othertypesofvirushavesurfaceproteinsthatcloselyresembleproteinsfoundinvariousorgansofmice.B.Micethatareinfectedwiththeherpesvirusbutdonotdevelopkeratitisproduceasmanyantibodiesasinfectedmicethatdodevelopkeratitis.C.Miceinfectedwithanewstrainoftheherpesvirusthathasdifferentsurfaceproteinsdidnotdevelopkeratitis.D.Micethathaveneverbeeninfectedwiththeherpesviruscansometimesdevelopkeratitis.E.Therearemicethatareunabletoformantibodiesinresponsetoherpesinfections,andthesemicecontractherpesatroughlythesamerateasothermice.28.173+174=A.177B.173(18)C.176(18)D.2(173)+17E.2(173)-1729.MarkandAnntogetherwereallocatednboxesofcookiestosellforaclubproject.Marksold10boxeslessthannandAnnsold2boxeslessthann.IfMarkandAnnhaveeachsoldatleastoneboxofcookies,buttogethertheyhavesoldlessthannboxes,whatisthevalueofn?A.11B.12C.13D.14E.1530.Ofthethree-digitintegersgreaterthan700,howmanyhavetwodigitsthatareequaltoeachotherandtheremainingdigitdifferentfromtheothertwo?A.90B.82C.80D.45E.3631.Foragroupofnpeople,kofwhomareofthesamesex,theexpressionyieldsanindexforacertainphenomenoningroupdynamicsformembersofthatsex.Foragroupthat,consistsof20people,4ofwhomarefemales,byhowmuchdoestheindexforthefemalesexceedtheindexforthemalesinthegroup?A.0.05B.0.0625C.0.2D.0.25E.0.632.Ifx,y,andzarepositiveintegers,and4x=5y=6z,thentheleastpossiblevalueofx+y+zisA.15B.28C.37D.42E.6O33.Kimboughtatotalof$2.65worthofpostagestampsinfourdenominations.Ifsheboughtanequalnumberof5-centand25-centstampsandtwiceasmany10-centstampsas5-centstamps,whatistheleastnumberof1-centstampsshecouldhavebought?A.5B.10C.15D.20E.2534.Bengal-bornwriter,philosopher,andeducatorRabindranathTagorehadthegreatestadmirationforMohandasK.Gandhithepersonandalsoasapolitician,butTagorehadbeenskepticalofGandhi'sformofnationalismandhisconservativeopinionsaboutIndia'sculturaltraditions.A.forMohandasK.Gandhithepersonandalsoasapolitician,butTagorehadbeenB.forMohandasK.Gandhiasapersonandasapolitician,butTagorewasalsoC.forMohandasK.Gandhinotonlyasapersonandasapolitician,butTagorewasalsoD.ofMohandasK.Gandhiasapersonandasalsoapolitician,butTagorewasE.ofMohandasK.Gandhinotonlyasapersonandasapolitician,butTagorehadalsobeen35.InasurveyofconsumersinanEasternEuropeannation,respondentswereaskedtwoquestionsabouteachof400famousWesternbrands:whetherornottheyrecognizedthebrandnameandwhetherornottheythoughttheproductsbearingthatnamewereofhighquality.Theresultsofthesurveywerearatingandcorrespondingrankorderforeachbrandbasedonrecognition,andasecondrating-plus-rankingbasedonapproval.

Thebrandsrankedinthetop27forrecognitionwerethoseactuallyavailableinthenation.Theapprovalrankingsofthese27brandsoftendifferedsharplyfromtheirrecognitionrankings.Bycontrast,mostoftheotherbrandshadratings,andthusrankings,thatwereessentiallythesameforrecognitionasforapproval.

Whichoneofthefollowing,ifeachisaprincipleaboutconsumersurveys,isviolatedbythesurveydescribed?A.Neveraskallrespondentsaquestionifitcannotreasonablybeansweredbyrespondentswhomakeaparticularresponsetoanotherquestioninthesamesurvey.B.Neveraskaquestionthatislikelytogeneratealargevarietyofresponsesthataredifficulttogroupintoamanageablenumberofcategories.C.Neveraskallrespondentsaquestionthatrespondentscannotanswerwithoutgivinguptheiranonymity.D.Itisbettertoaskthesamequestionabouttendifferentproductsthantoasktendifferentquestionsaboutasingleproduct.E.Itisbesttoaskquestionsthatarespondentcananswerwithoutfearofhavinggottentheanswerwrong.36.Theaverage(arithmeticmean)ofthepositiveintegersx,y,andzis3.Ifx＜y＜z,whatisthegreatestpossiblevalueofz?A.5B.6C.7D.8E.937.Aaronwilljogfromhomeatxmilesperhourandthenwalkbackhomebythesamerouteatymilesperhour.HowmanymilesfromhomecanAaronjogsothathespendsatotalofthoursjoggingandwalking?

A.

B.

C.

D.

E.38.Iftherangeofthesixnumbers4,3,14,7,10,andxis12,whatisthedifferencebetweenthegreatestpossiblevalueofxandtheleastpossiblevalueofx?A.0B.2C.12D.13E.1539.Ifanintegernisdivisiblebyboth6and8,thenitmustalsobedivisiblebywhichofthefollowing?A.10B.12C.14D.16E.1840.ListTconsistsof30positivedecimals,noneofwhichisaninteger,andthesumofthe30decimalsisS.Theestimatedsumofthe30decimals,E,isdefinedasfollows.EachdecimalinTwhosetenthsdigitisevenisroundeduptothenearestinteger,andeachdecimalinTwhosetenthsdigitisoddisroundeddowntothenearestinteger;Eisthesumoftheresultingintegers.IfofthedecimalsinThaveatenthsdigitthatiseven,whichofthefollowingisapossiblevalueofE-S?

Ⅰ.-16

Ⅱ.6

Ⅲ.10A.ⅠonlyB.ⅠandⅡonlyC.ⅠandⅢonlyD.ⅡandⅢonlyE.Ⅰ,Ⅱ,andⅢ41.Researchershavefoundthatwhenveryoverweightpeople,whotendtohaverelativelylowmetabolicrates,loseweightprimarilythroughdieting,theirmetabolismsgenerallyremainunchanged.Theywillthusburnsignificantlyfewercaloriesatthenewweightthendopeoplewhoseweightisnormallyatthatlevel.Suchnewlythinpersonswill,therefore,ultimatelyregainweightuntiltheirbodysizeagainmatchestheirmetabolicrate.

Theconclusionoftheargumentabovedependsonwhichofthefollowingassumptions?A.Relativelyfewveryoverweightpeoplewhohavedieteddowntoanewweighttendtocontinuetoconsumesubstantiallyfewercaloriesthandopeoplewhosenormalweightisatthatlevel.B.Themetabolismsofpeoplewhoareusuallynotoverweightaremuchmoreabletovarythanthemetabolismsofpeoplewhohavebeenveryoverweight.C.Theamountofcaloriesthatapersonusuallyburnsinadayisdeterminedmorebytheamountthatisconsumedthatdaythanbythecurrentweightoftheindividual.D.Researchershave

not

yet

determined

whether

themetabolicratesofformerlyveryoverweightindividualscanbeacceleratedbymeansofchemicalagents.E.Becauseoftheconstancyoftheirmetabolicrates,peoplewhoareattheirusualweightnormallyhaveasmuchdifficultygainingweightastheydolosingit.42.Scientistsnowbelievethatartificial-hipimplants,previouslythoughttobesafe,mayactuallyincreasetheriskofcancerinrecipientsafterabout45yearsofuse.Thoughtheseimplantsdoimprovethequalityofrecipients'lives,theincreasedriskofcancerisanunacceptablepric