2023年研究生类研究生管理科学入学考试(GMAT)参考2010-2022历年真题选编带答案难题含解析

2023年研究生类研究生管理科学入学考试(GMAT)参考2010-2022历年真题选编带答案难题含解析（图片大小可自由调整）第1卷一.历年考点试题黑钻版(共75题)1.

Whichofthefollowingcanproperlybeconcludedfromthedatapresentedinthegraph?A.The1962surveywasbasedonalargersamplethanthe1992surveywas.B.Intheperiodbetweenthesurveys,denyingtelevisionprivilegeswasneverthedisciplinarytechniquemostpopularwithparents.C.Thefourdisciplinarytechniquesfeaturedinthegraphweretheonlydisciplinarytechniquesnamedbyparentsineithersurvey.D.The1962surveyallowedparentstonamemorethanonedisciplinarytechnique,butthe1992surveymaynothaveallowedthis.E.Intheperiodbetweenthesurveys,therewerenosignificantchangesinthepopularityoflecturingchildrenasadisciplinarymethod.2.Thefinaldecadesofthetwentiethcenturynotonlysawanexplosionoftheliteraryproductionamongwomen,buttherewasalsoanintenseinterestinthelivesandworksofwomenwriters.A.notonlysawanexplosionoftheliteraryproductionamongwomen,buttherewasalsoB.notonlysawanexplosionofliteraryproductioninwomen,buttherewasalsoC.sawnotonlyanexplosionofliteraryproductionamongwomen,butalsoD.sawnotonlyanexplosionoftheliteraryproductionbywomen,butitalsosawE.sawnotonlyanexplosionofliteraryproductionbywomen,butalsosaw3.Forthepositivenumbers,n,n+1,n+2,n+4andn+8,themeanishowmuchgreaterthanthemedian?A.0B.1C.n+1D.n+2E.n+34.Mouthcancerisadanger,forpeoplewhorarelybrushtheirteeth.Inordertoachieveearlydetectionofmouthcancerintheseindividuals,atown'spublichealthofficialssentapamphlettoalltownresidents,describinghowtoperformweeklyself-examinationsofthemouthforlumps.

Whichofthefollowing,iftrue,isthebestcriticismofthepamphletasamethodofachievingthepublichealthofficials'goal?A.Manydentaldiseasesproducesymptomsthatcannotbedetectedinaweeklyself-examination.B.Oncemouthcancerhasbeendetected,theeffectivenessoftreatmentcanvaryfrompersontoperson.C.Thepamphletwassenttoalltownresidents,includingthoseindividualswhobrushtheirteethregularly.D.Mouthcancerismuchmorecommoninadultsthaninchildren.E.Peoplewhorarelybrushtheirteethareunlikelytoperformaweeklyexaminationoftheirmouth.5.Ofthefollowing,whichismostnearlyequaltobutnotgreaterthan?A.3.7B.3.8C.3.9D.4.0E.4.16.Inananimalbehaviorexperiment,50taggedwhitepigeonsand200taggedgraypigeonswerereleasedfromalaboratory.Withinoneweek,88percentofthewhitepigeonsand80.5percentofthegraypigeonshadreturnedtothelaboratory.Whatpercentofthetotalnumberofpigeonsreturnedtothelaboratory?A.80.5B.82C.82.5D.85E.86.57.Whichofthefollowingmostlogicallycompletestheargument?

Alivia'sgovernmenthasapprovedfundsforanelectricity-generationprojectbasedontheconstructionofapipelinethatwillcarrywaterfromLakeCylus,inthemountains,tothemuchsmallerLakeTifele,inanearbyvalley.Theamountofelectricitygeneratedwillbeinsufficientbyitselftojustifytheproject'scost,evenifthepriceofimportedoil—Alivia'sprimarysourceofelectricity—increasessharply.Nonetheless,thepipelineprojectisworthitscost,because______.A.thepriceofoil,oncesubjecttofrequentsharpincreases,hasfallensignificantlyandisnowfairlystableB.theprojectcouldrestoreLakeTifele,whichiscurrentlyatriskofdryingupandthusofbeinglostasasourceofrecreationincomeforAliviaC.thegovernmentofAliviaiscurrentlyonexcellenttermswiththegovernmentsofmostofthecountriesfromwhichitpurchasesoilD.itwouldcostlesstogenerateelectricitybymovingwaterfromLakeCylustoLakeTifelethantodosobymovingwaterfromLakeCylustoanothervalleylakeE.AlivianofficialsdonotexpectthattheamountofelectricityusedinAliviawillincreasesubstantiallywithinthenexttenyears8.直线A与直线B斜率相同，直线A过点(-1，0)，求直线B的方程?

(1)直线A过点(0，-1)

(2)直线B过点(10，20)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．9.Aspeopleage,thenumberofcaloriestheyneedeachdaydecreaseswhiletheirdailyrequirementofvitaminB6increases.Clearly,unlessolderpeopletake136supplementsoreatadietthatcontainsmore136thandidthediettheyatewhentheywereyoungadults,thereislittlelikelihoodthattheywillgetB6inneededamounts.

Whichofthefollowingwouldbemosthelpfultoknowtoevaluatetheargument?A.WhethertherelativedecreaseinthedailyrequirementofcaloriesisgreaterthantherelativeincreaseinthedailyrequirementofvitaminB6.B.WhethertheformofvitaminB6foundindietarysupplementsismorereadilyabsorbedandutilizedbythebodythanisthefromofthisvitaminthatisfoundinfood.C.WhethertheconsequencesofnotgettingvitaminB6inrequireddailyamountsaremoreseriousforolderpeoplethanforyoungadults.D.Whetherthedietsofmostpeople,whentheyareyoungadults,includevitaminB6inamountsfarinexcessoftheirdailyneeds.E.WhetherthedietsofolderpeoplearemorelikelythanthoseofyoungadultstoincludeoneormoremealsadaythataredevoidoffoodscontainingvitaminB6.10.Normally,increasesinthepriceofaproductdecreaseitssalesexceptwhenthepriceincreaseaccompaniesanimprovementintheproduct.Wineisunusual,however.Oftenincreasesinthepriceofaparticularproducer'swinewillresultinincreasedsales,evenwhenthewineitselfisunchanged.

Whichofthefollowing,iftrue,doesmosttoexplaintheanomalydescribedabove?A.Theretailwinemarketischaracterizedbyanextremelywiderangeofcompetingproducts.B.Manyconsumersmakedecisionsaboutwhichwinestopurchaseonthebasisofreviewsofwinepublishedinbooksandperiodicals.C.Consumersselectingwineinastoreoftenusethepricechargedastheirmainguidetothewine'squality.D.Wineretailersandproducerscangenerallyincreasethesalesofaparticularwinetemporarilybyintroducingapricediscount.E.Consumerswhopurchasewineregularlygenerallyhavestrongopinionsaboutwhichwinestheyprefer.11.InJanuarytherewasalargedropinthenumberofnewhousessold,becauseinterestratesformortgageswerefallingandmanyconsumerswerewaitingtoseehowlowtherateswouldgo.Thislargesalesdropwasaccompaniedbyasharpriseintheaveragepriceofnewhousessold.

Whichofthefollowing,iftrue,bestexplainsthesharpriseintheaveragepriceofnewhouses?A.Salesofhigher-pricedhouseswereunaffectedbythesalesdropbecausetheirpurchasershavefewerconstraintslimitingthetotalamounttheypay.B.LaboragreementsofbuilderswithconstructionunionsarenotduetoexpireuntilthenextJanuary.C.Thepricesofnewhouseshavebeenrisingslowlyoverthepastthreeyearsbecausethereisanincreasingshortageofhousing.D.Therewasagreateramountofmoderate-pricedhousingavailableforresalebyownersduringJanuarythanintheprecedingthreemonths.E.Interestratesforhomemortgagesareexpectedtorisesharplylaterintheyearifpredictionsofincreasedbusinessactivityingeneralprovetobeaccurate.12.Anexperimentwasdoneinwhichhumansubjectsrecognizeapatternwithinamatrixofabstractdesignsandthenselectanotherdesignthatcompletesthatpattern.Theresultsoftheexperimentweresurprising.Thelowestexpenditureofenergyinneuronsinthebrainwasfoundinthosesubjectswhoperformedmostsuccessfullyintheexperiments.

Whichofthefollowinghypothesesbestaccountsforthefindingsoftheexperiment?A.Theneuronsofthebrainreactlesswhenasubjectistryingtorecognizepatternsthanwhenthesubjectisdoingotherkindsofreasoning.B.Thosewhoperformedbestintheexperimentexperiencedmoresatisfactionwhenworkingwithabstractpatternsthandidthosewhoperformedlesswell.C.Peoplewhoarebetteratabstractpatternrecognitionhavemoreenergy-efficientneuralconnections.D.Theenergyexpenditureofthesubjects'brainsincreaseswhenadesignthatcompletestheinitiallyrecognizedpatternisdetermined.E.Thetaskofcompletingagivendesignismorecapablyperformedbyathletes,whoseenergyexpenditureislowerwhentheyareatrest.13.GeorgeBernardShawwrote:"Thatanysanenation,havingobservedthatyoucouldprovideforthesupplyofbreadbygivingbakersapecuniaryinterestinbakingforyou,shouldgoontogiveasurgeonapecuniaryinterestincuttingoffyourlegisenoughtomakeonedespairofpoliticalhumanity.Shaw'sstatementwouldbestserveasanillustrationinanargumentcriticizingwhichofthefollowing?A.Dentistswhoperformunnecessarydentalworkinordertoearnaprofit.B.Doctorswhoincreasetheirprofitsbyspecializingonlyindiseasesthataffectalargepercentageofthepopulation.C.Grocerswhoraisethepriceoffoodinordertoincreasetheirprofitmargins.D.Oilcompaniesthatdecreasethepriceoftheiroilinordertoincreasetheirmarketshare.E.Bakersandsurgeonswhoearnaprofitbysupplyingotherpeoples'basicneeds.14.GeorgeBernardShawwrote:“Thatanysanenation,havingobservedthatyoucouldprovideforthesupplyofbreadbygivingbakersapecuniaryinterestinbakingforyou,shouldgoontogiveasurgeonapecuniaryinterestincuttingoffyourlegisenoughtomakeonedespairofpoliticalhumanity.”

Shaw'sstatementwouldbestserveasanillustrationinanargumentcriticizingwhichofthefollowing?A.DentistswhoperformunnecessarydentalworkinordertoearnaprofitB.DoctorswhoincreasetheirprofitsbyspecializingonlyindiseasesthataffectalargepercentageofthepopulationC.GrocerswhoraisethepriceoffoodinordertoincreasetheirprofitmarginsD.OilcompaniesthatdecreasethepriceoftheiroilinordertoincreasetheirmarketshareE.Bakersandsurgeonswhoearnaprofitbysupplyingotherpeoples'basicneeds15.Whatisthelargestintegernsuchthat?A.5B.6C.7D.10E.5116.Ifx,yandzarenon-zeronumberssuchthat1≥y＞xandxy=z,whichofthefollowingcannotbetrue?A.y＞zB.y=zC.z=xD.x＞zE.z＞017.Inacertainsequence,eachtermafterthefirsttermisone-halfthepreviousterm.Ifthetenthtermofthesequenceisbetween0.0001and0.001,thenthetwelfthtermofthesequenceisbetweenA.0.0025and0.025B.0.00025and0.0025C.0.000025and0.00025D.0.0000025and0.000025E.0.00000025and0.000002518.Oneofthelimitingfactorsinhumanphysicalperformanceistheamountofoxygenthatisabsorbedbythemusclesfromthebloodstream.Accordingly,entrepreneurshavebegunsellingatgymnasiumsandhealthclubsbottlesofdrinkingwater,labeled"SuperOXY,"thathasextraoxygendissolvedinthewater.Suchwaterwouldbeuselessinimprovingphysicalperformance,however,sincetheonlywaytogetoxygenintothebloodstreamsothatitcanbeabsorbedbythemusclesisthroughthelungs.

Whichofthefollowing,iftrue,wouldservethesamefunctionintheargumentasthestatementinboldface?______A.Thewaterlostinexercisingcanbereplacedwithordinarytapwater.B.Theamountofoxygeninthebloodofpeoplewhoareexercisingisalreadymorethanthemusclecellscanabsorb.C.World-classathletesturninrecordperformanceswithoutsuchwater.D.Frequentphysicalexerciseincreasesthebody'sabilitytotakeinanduseoxygen.E.Lackofoxygenisnottheonlyfactorlimitinghumanphysicalperformance.19.Previously,Autocodesignedallofitscarsitselfandthencontractedwithspecializedpartssupplierstobuildpartsaccordingtoitsspecifications.Nowitplanstoincludeitssuppliersindesigningthepartstheyaretobuild.SincemanypartssuppliershavemoredesignerswithspecializedexperiencethanAutocohas,Autocoexpectsthisshifttoreducetheoveralltimeandcostofthedesignofitsnextnewcar.

Whichofthefollowing,iftrue,moststronglysupportsAutoco'sexpectation?A.Whensuppliersprovidetheirowndesigns,Autocooftenneedstomodifyitsoveralldesign.B.InordertoprovidedesignsforAutoco,severalofthepartssupplierswillhavetoaddtotheirexistingstaffsofdesigners.C.Partsandservicesprovidedbyoutsidesuppliersaccountformorethan50percentofAutoco'stotalcosts.D.WhensuppliersbuiltpartsaccordingtospecificationsprovidedbyAutoco,thesupplierscompetedtowincontracts.E.MostofAutoco'ssuppliershaveonhandawiderangeofpreviouslypreparedpartsdesignsthatcanreadilybemodifiedforanewcar.20.Thepriceofacoatinacertainstoreis$500.Ifthepriceofthecoatistobereducedby$150,bywhatpercentisthepricetobereduced?A.10%B.15%C.20%D.25%E.30%21.Ifanintegernisdivisiblebyboth6and8,thenitmustalsobedivisiblebywhichofthefollowing?A.10B.12C.14D.16E.1822.Whentheintegerkisdividedby12,theremainderis3.Whichofthefollowing,whendividedby12,willhavearemainderof6?

Ⅰ2k

Ⅱ6k

Ⅲ4k+6A.ⅠonlyB.ⅡonlyC.ⅢonlyD.ⅠandⅡonlyE.Ⅰ,Ⅱ,andⅢ23.Aftergraduatingfromhighschool,peoplerarelymultiplyfractionsordiscussancientRome,buttheyareconfronteddailywithdecisionsrelatingtohomeeconomics.Yetwhereasmathematicsandhistoryarerequiredcoursesinthehighschoolcurriculum,homeeconomicsisonlyanelective,andfewstudentschoosetotakeit.

Whichofthefollowingpositionswouldbebestsupportedbytheconsiderationsabove?A.Ifmathematicsandhistorywerenotrequiredcourses,fewstudentswouldchoosetotakethem.B.Whereashomeeconomicswouldbethemostusefulsubjectforpeoplefacingthedecisionstheymustmakeindailylife,oftenmathematicsandhistorycanalsohelpthemfacethesedecisions.C.Ifitisimportanttoteachhighschoolstudentssubjectsthatrelatetodecisionsthatwillconfrontthemintheirdailylives,thenhomeeconomicsshouldbemadeanimportantpartofthehighschoolcurriculum.D.Mathematics,history,andothercoursesthatarenotdirectlyrelevanttoaperson'sdailylifeshouldnotbearequiredpartofthehighschoolcurriculum.E.Unlesshighschoolsputmoreemphasisonnonacademicsubjectslikehomeeconomics,peoplegraduatingfromhighschoolwillneverfeelcomfortableaboutmakingthedecisionsthatwillconfrontthemintheirdailylives.24.Astraightpipe1yardinlengthwasmarkedoffinfourthsandalsointhirds.Ifthepipewasthencutintoseparatepiecesateachofthesemarkings,which

ofthefollowinggivesallthedifferentlengthsofthepieces,infractionsofayard?

25.X+5，Y+5，Z+5的标准方差(standarddeviation)是多少?

(1)X，Y的标准方差大于0.3。

(2)X，Y，Z的标准方差等于0.2。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．26.Asanactressand,moreimportantly,asateacherofacting,StellaAdlerwasoneofthemostinfluentialartistsintheAmericantheater,whotrainedseveralgenerationsofactorsincludingMarionBrandoandRobertDeNiro.A.StellaAdlerwasoneofthemostinfluentialartistsintheAmericantheater,whotrainedseveralgenerationsofactorsincludingB.StellaAdler,oneofthemostinfluentialartistsintheAmericantheater,trainedseveralgenerationsofactorswhoincludeC.StellaAdlerwasoneofthemostinfluentialartistsintheAmericantheater,trainingseveralgenerationsofactorswhoseranksincludedD.oneofthemostinfluentialartistsintheAmericantheaterwasStellaAdler,whotrainedseveralgenerationsofactorsincludingE.oneofthemostinfluentialartistsintheAmericantheater,StellaAdler,trainedseveralgenerationsofactorswhoseranksincluded27.Whichofthefollowingmostlogicallycompletestheargumentbelow?

EachyeareveryemployeeofSAICorporationmustenrollinoneofthetwohealthinsuranceplansofferedbySAI.Oneplanrequiresasizablemonetarycontributionfromemployees;theotherplanispaidforentirelybySAI.ManySAIemployeesenrollintheplanrequiringemployeecontributions.Thisfactdoesnotshowthattheyfeelthatthisplan'sbenefitsaresuperiortothoseprovidedbytheplanrequiringnoemployeecontributionsince______.A.theplanthatrequiresanemployeecontributioncostsandenrolledemployeesignificantlylessperyearthandotypicalhealthinsuranceplansofferedbycorporationsotherthanSAIB.onlySAIemployeeswhohaveworkedforSAIforatleastfifteenyearsareeligibletoenrollintheplanpaidforentirelybySAIC.thetwohealthinsuranceplanscurrentlyofferedbySAIaresubstantiallythesameplansSAIhasofferedforthepasttenyearsD.mostoftheSAIemployeesenrolledintheplanpaidforentirelybySAIareunder50yearsoldE.bothplansofferedbySAIprovidebenefitsnotonlyforemployeesofSAIbutalsoforchildrenandspousesofenrolledemployees28.Turtles,likeotherreptiles,canendurelongfasts,intheirabilitytosurviveonweeklyorevenmonthlyfeedings;however,whenfoodisreadilyavailable,theymayeatfrequentlyandgrowveryfat.A.fasts,intheirabilitytosurviveB.fasts,havingtheirabilitytosurviveC.fasts,duetohavingtheabilityofsurvivingD.fastsbecausetheyareabletosurviveE.fastsbecauseofhavingtheabilityofsurviving29.

Aportionofathermometeraboveiscalibratedtoshowdegreesinequalincrements.IfthetemperatureindicatesareadingatlevelA,whatisthetemperature?A.94.069B.94.070C.94.079D.94.080E.94.79030.TheMaxiluxcarcompany'sdesignforitsnewluxurymodel,theMax100,includedaspecialdesignforthetiresthatwasintendedtocomplementthemodel'simage.ThewinningbidforsupplyingthesetireswassubmittedbyRubco.AnalystsconcludedthatthebidwouldonlyjustcoverRubco'scostsonthetires,butRubcoexecutivesclaimthatwinningthebidwillactuallymakeaprofitforthecompany.

Whichofthefollowing,iftrue,moststronglyjustifiestheclaimmadebyRubco'sexecutives?A.InanyMaxiluxmodel,thesparetireisexactlythesamemakeandmodelasthetiresthataremountedonthewheels.B.RubcoholdsexclusivecontractstosupplyMaxiluxwiththetiresforanumberofothermodelsmadebyMaxilux.C.TheproductionfacilitiesfortheMax100andthoseforthetirestobesuppliedbyRubcoarelocatedveryneareachother.D.Whenpeoplewhohavepurchasedacarefullydesignedluxuryautomobileneedtoreplaceawornpartofit,theyalmostinvariablyreplaceitwithapartofexactlythesamemakeandtype.E.WhenMaxiluxawardedthetirecontracttoRubco,theonlycriteriononwhichRubco'sbidwasclearlyaheadofitscompetitors'bidswasprice.31.InpartsofSouthAmerica,vitamin-Adeficiencyisaserioushealthproblem,especiallyamongchildren.Inoneregion,agriculturistsareattemptingtoimprovenutritionbyencouragingfarmerstoplantanewvarietyofsweetpotatocalledSPK004thatisrichinbeta-carotene,whichthebodyconvertsintovitaminA.Theplanhasgoodchancesofsuccess,sincesweetpotatoisastapleoftheregion'sdietandagriculture,andthevarietiescurrentlygrowncontainlittlebeta-carotene.

Whichofthefollowing,iftrue,moststronglysupportsthepredictionthattheplanwillsucceed?______A.ThegrowingconditionsrequiredbythevarietiesofsweetpotatocurrentlycultivatedintheregionareconditionsinwhichSPK004canflourish.B.ThefleshofSPK004differsfromthatofthecurrentlycultivatedsweetpotatoesincolorandtexture,sotraditionalfoodswouldlooksomewhatdifferentwhenpreparedfromSPK004.C.Therearenoothervarietiesofsweetpotatothataresignificantlyricherinbeta-carotenethanSPK004is.D.ThevarietiesofsweetpotatocurrentlycultivatedintheregioncontainsomeimportantnutrientsthatarelackinginSPK004.E.Thereareothervegetablescurrentlygrownintheregionthatcontainmorebeta-carotenethanthecurrentlycultivatedvarietiesofsweetpotatodo.32.Foranypositiveintegern,thesumofthefirstnpositiveintegersequals.Whatisthesumofalltheevenintegersbetween99and301?A.10,100B.20,200C.22,650D.40,200E.45,15033.Pricesattheproducerlevelareonly1.3percenthighernowthanayearagoandaregoingdown,eventhoughfloodsintheMidwestanddroughtintheSoutharehurtingcropsandthereforeraisedcornandsoybeanprices.A.thanayearagoandaregoingdown,eventhoughfloodsintheMidwestanddroughtintheSoutharehurtingcropsandthereforeraisedB.thanthoseofayearagoandaregoingdown,eventhoughfloodsintheMidwestanddroughtintheSoutharehurtingcropsandthereforeraisingC.thanayearagoandaregoingdown,despitefloodsintheMidwestanddroughtintheSouth,andarehurtingcropsandthereforeraisingD.asthoseofayearagoandaregoingdown,eventhoughfloodsintheMidwestanddroughtintheSouthhurtcropsandthereforeraiseE.astheywereayearagoandaregoingdown,despitefloodsintheMidwestanddroughtintheSouth,andarehurtingcropsandthereforeraising34.Inanelectriccircuit,tworesistorswithresistancesxandyareconnectedinparallel.Inthiscase,ifristhecombinedresistanceofthesetworesistors,thenthereciprocalofrisequaltothesumofthereciprocalsofxandy.Whatisrintermsofxandy?

A.xy

B.x+y

C.

D.

E.35.IfMelsavedmorethan$10bypurchasingasweaterata15percentdiscount,whatisthesmallestamounttheoriginalpriceofthesweatercouldbe,tothenearestdollar?A.45B.67C.75D.83E.15036.Acertainencyclopediahas20volumes,eachofwhichisωincheswide,kincheslongandtinchesthick.Ifallofthevolumesaretobetightlypackagedinonerectangularboxthatiskincheswideandωinchesdeepinside,couldtheinsidelengthoftheboxbelessthan35inches.

(1)t=1.5

(2)ω=9andk=12A.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．37.Charlie'sChainsawCompanyhasreasontobelievethatoneofitsmodelsofsawisdefective.Arecallofallofthesawswouldcostmorethan$5million,andwouldprobablyresultinalossinmarketshareoverthenextquarterbecauseofbadpublicity.Still,arecallistherighteconomicdecision.

Whichofthefollowing,iftrue,mostsupportstheconclusionabove?A.Defectivechainsawscanseriouslyinjureorevenkillthepeoplewhousethem.B.Charlie'schiefrivalhasrecalledtwoofitsproductswithinthepastyear.C.Productrecallsoftenresultinaperceptionbycustomersthatagivenproductispermanentlydefective,evenafterthedefecthasbeenremedied.D.Thestocksofpubliclytradedcompaniesthatannounceproductrecallsoftendropupontheannouncement,buttheygenerallyreturntothepre-announcementlevelwithin12months.E.Threeyearsagoarivalcompanywentoutofbusinessbecauseoflargepunitivedamagesawardedtoaplaintiffwhohadbeeninjuredbyadefectivechainsaw.38.Howmanytwo-digitwholenumbersyieldaremainderof1whendividedby10andalsoyieldaremainderof1whendividedby6?A.NoneB.OneC.TWOD.ThreeE.Four39.

Thetableaboveshowsthecost,indollars,oftravelingtoandfromcitiesA,B,C,D,E,andF.AsalesrepresentativewantstoleavefromA,traveltoC,E,andF,andreturntoA.IfthefirstcitythatthesalesrepresentativetravelstomustbeE，whatistheminimumpossiblecostfortheentiretrip?A.$13B.$14C.$16D.$18E.$2040.HighTowers,a'companythatoccupiesseveralofficebuildings,isconsideringinstallingnewenergy-efficientlightbulbsinitsbuildings.Thenewbulbsrequirelessthanhalftheelectricityconsumedbytheconventionalbulbscurrentlyusedtoproducethesameamountoflight.Thenewbulbsalsolastconsiderablylonger.Itfollowsthatbyreplacingoldbulbsastheyburnoutwiththenewkindofbulb,HighTowerswouldsignificantlyreduceitsoveralllightingcosts.

Whichofthefollowing,iftrue,moststrengthenstheargumentgiven?A.Ifthenewbulbsarewidelyadopted,asseemslikely,theywillbeproducedinlargeenoughquantitiestobeofferedatpricescomparabletothoseofconventionalbulbs.B.TheutilitythatsuppliesHighTowerswithelectricityoffersdiscountedratestoitslargestcustomers.C.HighTowershasrecentlysignedacontracttooccupyanadditionalsmallofficebuilding.D.HighTowershasbegunacampaigntoencourageitsemployeestoturnofflightswhenevertheyleavearoom.E.Thecompanythatmanufacturesthenewbulbshasbeengrantedapatentontheinnovativetechnologyusedinthebulbsandthushasexclusiverightstomanufacturethem.41.Thearithmeticmeanofadatasetis46andthestandarddeviationofthesetis4.Whichvalueisexactly1.5standarddeviationsfromthearithmeticmeanoftheset?A.42B.44.5C.47.5D.50E.5242.红灯亮的时间为40秒，黄灯亮的时间为5秒，绿灯亮的时间为45秒，这些灯按绿，黄，红的顺序闪，问5分钟内红灯亮的最长时间是多少?43.Ifa(a+2)=24andb(b+2)=24,wherea≠b,thena+b=A.-48B.-2C.2D.46E.4844.Duringa3-yearperiod,theprofitsofCompanyXchangedbywhatpercentfromthesecondyeartothethirdyear?

(1)TheincreaseinprofitsofCompanyXfromthefirstyeartothesecondyearwasthesameastheincreasefromthefirstyeartothethirdyear.

(2)ForCompanyX,theprofitsforthefirstyearwere$13,800andtheprofitsforthethirdyearwere$15,900.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．45.Forthewriterswhofirstgavefeudalismitsname,theexistenceoffeudalismpresupposedtheexistenceofanobleclass.Yettherecannotbeanobleclass,properlyspeaking,unlessboththetitlesthatindicatesuperiornoblestatusandtheinheritanceofsuchtitlesaresanctionedbylaw.AlthoughfeudalismexistedinEuropeasearlyastheeighthcentury,itwasnotuntilthetwelfthcentury,whenmanyfeudalinstitutionswereindecline,thatthehereditarytransferoflegallyrecognizedtitlesofnobilityfirstappeared.

Thestatementsabove,iftrue,moststronglysupportwhichoneofthefollowingclaims?A.Tosaythatfeudalismbydefinitionrequirestheexistenceofanobilityistoemployadefinitionthatdistortshistory.B.Priortothetwelfthcentury,theinstitutionofEuropeanfeudalismfunctionedwithoutthepresenceofadominantclass.C.Thefactthatasocietalgrouphasadistinctlegalstatusisnotinitselfsufficienttoallowthatgrouptobeproperlyconsideredasocialclass.D.ThedeclineoffeudalisminEuropewastheonlycauseoftheriseofa