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若x，y满足若z＝x+my的最大值为，则实数m＝ ．
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高三下学期数学《》真题及答案
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设z＝x＋y其中实数xy满足若z的最大值为6则z的最小值为
－3
－2
－1
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设z=kx+y其中实数xy满足若z的最大值为12则实数k=.
设z＝kx＋y其中实数xy满足若z的最大值为12则实数k＝________.
已知实数xy满足若z＝3x＋y的最大值为16则a＝________.
已知实数xy满足约束条件若目标函数z=x+y的最大值为4则实数a的值为.
设z＝kx＋y其中实数xy满足若z的最大值为12则实数k＝________.
变量xy满足约束条件若z=2x﹣y的最大值为2则实数m等于
﹣2
﹣1
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已知实数xy满足条件若目标函数z=2x+y的最小值为3则其最大值为.
若实数xy满足不等式组目标函数z=kx﹣y的最大值为12最小值为0则实数k=.
已知实数xy满足若目标函数z＝2x＋y的最大值与最小值的差为2则实数m的值为
4
3
2
－
已知实数xy满足若x﹣y的最大值为6则实数m=.
若实数xy满足约束条件则z=|x+2y-4|的最大值为.
若实数xy满足则z＝3x＋2y的最大值为.
已知变量xy满足约束条件若z＝2x－y的最大值为3则实数m等于________.
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已知实数xy满足1若z＝x2＋y2求z的最大值和最小值2若z＝求z的最大值和最小值.
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设z＝x＋y其中实数xy满足若z的最大值为6则z的最小值为
－3
－2
－1
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若实数xy满足约束条件则目标函数z=2x+3y的最大值为
设xy满足约束条件若目标函数z=kx+y的最大值为9则实数k的值为.
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5分After61graduatefromUniversityDavidHolmeswenttoChinatostudyChineseatBeijingLanguageandCultureUniversity.Twoyears62hewasabletospeak63fluentlyChinese.Upon64finishhisstudieshestartedtravelinginChina.InChinahedeveloped65interestinteachingEnglishtoChinesestudents.66hereturnedtoBritaintwomonthsagohebrought67fromChinamanyinterestingbookspaintingsandphotos.Hedonatedmostofthemtoourschoollibrary.Thepaintings68Daviddonatedtotheschoolarebeingshowninthe69exhibitroom.TeachersandstudentsatourschoolwishtothankDavidforhis70kind. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70.
10分定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处每处错误仅涉及一个单词的增加删除或修改. 增加把缺词处加个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不记分. DearMike YousaidyouwanttoknowalotabouttheEnglishClubofourschool.ItwasthreeyearsagowhentheEnglishClubwasborn.Itwasfoundtoimprovestudents'interestinEnglish.ThoseinterestedinEnglishgottogetherinthemultimediaclassroomeverySaturdayafternoon.Therearemanyactivitiesholdinginit.StudentscanwatchvariouslyEnglishfilms.TheycanaswellaslearntosingEnglishsongswhichcanhelpthemlearnEnglishwordbyheart.Inadditionmanytopicscanbediscussedthereinalanguage.Howdoyoulikeourclub?I'mlookingforwardtoearlyreply. Yours LiHua.
在某2L恒容密团容器中充入2molXg和1molYg发生反应2Xg+Yg⇌3Zg△H反应过程中持续升高温度测得混合体系中X的体积分数与温度的关系如图所示下列推断正确的是
.5分Theoldman'ssoncametothankthepolicemanwithhelphefinallyfoundhismother.
6分ProudlyreadingmywordsIglancedaroundtheroomonlytofindmyclassmatesbearingbigsmilesontheirfacesandtearsintheireyes.ConfusedIglancedtowardmystone﹣facedteacher.HavingnochoiceIslowlyraisedthereportIhadslavedoverhopingtohidemyself.Whatcouldbecausingeveryonetoactthisway? QuicklyIflashedbacktothedayMissLancelotgavemethetask.ThiswasthefirstrealtalkIreceivedinmynewschool.ItseemedsimplegoontheInternetandfindinformationaboutamannamedGeorgeWashington.SincemyideaofhistorycamefromanancientteacherinmyhomecountryIhadneverheardofthatnamebefore.AsIsearchedthenameofthisfellowitbecameevidentthatthereweretwopeoplebearingthesamenamewholookedcompletelydifferent!OneinventedhundredsofusesforpeanutswhiletheotherledsomesortofarmyacrossAmerica.Istaredatthescreenwonderingwhichonemyteachermeant.Icalledmygrandfatherforagoldenpieceofadviceflip掷acoin.Heads﹣thecommanderandtails﹣thepeanutsguy.Ah!TailsmyreportwouldbeaboutthegreatmanwhoinventedpeanutbutterGeorgeWashington WeekslaterstandingbeforethisunfriendlymassIwastotallylost.OhwellIloweredthepaperandsatdownatmydeskburningtofindoutwhatIhaddonewrong.AsaclassmatebeganhisreportitallbecameclearMyreportisonGeorgeWashingtonthemanwhostartedtheAmericanRevolution.Thewholeworldbecamequite!HowcouldIknowthatshemeantthatGeorgeWashington? Obviouslymygradewasawful.HeartbrokenbutfearlessIdecidedtoturnthisaround.ItalkedtoMissLancelotbutsheinsistedNore﹣dosnonewgrade.IfeltthatthepunishmentwasnotjustifiedandIbelievedIdeservedasecondchance.ConsequentlyIthrewmyselfheartilyintomyworkfortherestoftheschoolyear.TenmonthslaterthatchanceunfoldedasIfoundmyselfsittingintheheadmaster'sofficewithmygrandfathernowhavinganentirelydifferentconversation.Ismiledandflashedbacktotheembarrassingmomentatthebeginningoftheyearastheheadmasterinformedmeofmychancetoskipthesixthgrade.Justiceissweet! 33.Whywastheauthorconfusedaboutthetask? A.HewasunfamiliarwithAmericanhistory. B.Hefollowedtheadviceandflippedacoin. C.Heforgothisteacher'sinstruction. D.Hewasnewattheschool. 34.TheunderlinedwordburninginPara.3probablymeans. A.annoyed B.ashamed C.ready D.eager 35.Intheendtheauthorturnedthingsaround. A.byredoinghistask B.throughhisownefforts C.withthehelpofhisgrandfather D.undertheguidanceofhisheadmaster.
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6分 EVENTS LongMarchexhibit TheShanghaiHistoryMuseumisputtingonanexhibitiontomarkthe60thanniversaryoftheLongMarch.Onshowaremorethan220photosand40itemsthatexplainwithpictureshowthecommunistRedArmydrewbackfromitsbesieged被围困的basesinJiangxiProvinceandfoughtitswaytonorthernShanxiProvinceinthemid﹣1930s.ExplanationsareallinChinese.TheshowwillendonNovember20. Time1000am﹣400pmAddress1286HongqiaoRoad Admission8yuanforChinese/15yuanforforeigners Thaielephants EightelephantsfromThailandareentertainingvisitorsatChangfengParkbyridingbikesplayingbasketballbalancingonabeamdancingandblowingamouthorgan.Peopleareencouragedtohaveatug﹣of﹣war拔河比赛withtheanimalsorlieonthegroundandhavetheelephantswalkoverthem.Theelephantsgivethreeshowsadayat930am330pmand800pmandthereisanadditionalshowatl30pmatweekends.TheshowwillendonNovember15. Address189DaduheRoadAdmission30﹣40yuan Dancingdolphins DolphinsjumpingfromthewatertotouchaballswayingtheirbodiestomusickissingpeopleanddoingmathbytappingtheirtailshavemadethedolphinariuminPeaceParkanattractionforchildren.Sealsandsealionsalsoperform. Hours1030am400pmand730pm Admission20yuanforadultsand10yuanforchildren. 1.IfyougotovisittheLongMarchexhibitionwithanAustralianhowmuchwillyoupayaltogetherfortheadmission? A.16yuan. B.30yuan. C.23yuan. D.20yuan. 2.WhichofthefollowingisNOTdonebytheThaielephants? A.Ridingbicycles. B.Blowingamouth﹣organ. C.Havingatug﹣of﹣warwithpeople. D.Doingmath. 3.ThedolphinariuminPeaceParkisahallwhereyoucansee. A.onlysealsandsealionsperform B.onlydolphinsperform C.notonlydolphinsbutalsosealsandsealionsperform D.onlysealsperform
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8分BeforeIhadmysonIspenttwoyearsworkingwithchildrenwithdisabilities.Ilearnedthatshoutingandthreatsofpunishmentwouldresultinadisaster.Comingupagainsttheirbehaviourcouldonlymakethejobharderandtheirbehaviourmoreextreme.Ifoundsomethingthatworkedthough. Therewasaverynaughtyboyinthenurseryandateacherwhowasgenerallyveryconfidentwiththechildrenwasaskedtotakechargeofhim.Onedaytheboyjoinedasessionintheroomnexttomine.Hisappearancecreatedanatmosphereoftension.Hespenttheentiresessionrunningaroundhittingandkickinganddestroyingproperty. Iwasinthecraftroomworkingwithsomeotherchildrenwhenmyco﹣workertoldmethatthisboy'steacherwasintearsandcouldnotgetcontrolofthesituation.Asweweretalkingtheboyranin.Itoldmyco﹣workerthatIwouldtakecareofhim. Iclosedthedoor.Hewasfullofenergythrowingthingsaroundandmakingahugemess.ButIcouldseethathewasdoingallthesetoannoyme.Heneededconnectionandthiswastheonlywayheknewhowtoaskforit.SoIsatbackdownandkeptquiet.Thenhesloweddownandbeganmakingarocket.Italkedtohimaboutit.WecontinuedlikethisforafewminutesbeforeIslippedintotheconversation Sowhathappenedtoday? Itwaspurelyaquestionnoblameorangerinmytone.IbelievethatifIhadcriticizedhimthegatethatwasslowlyopeningwouldhaveshutfirmlyclosed.Hetoldmethattheteacherdidn'tlethimdowhatheknewwellduetosafetybutaskedhimtodowhathedisliked.Healsoadmittedthathehadenjoyedmakingherrunaroundandsawitasagame.Iexplainedthathisteacherhadnotseenitasagameandwasveryupset.Thisagainwasstatedsimplyasafact.Isuggestedthatnexttimehehadasessionhetalkaboutwhathehopedtodoatthestartwhichmightbeeasierforeveryone.Heagreedandwasquietforamoment.Thenhelookedatmewithtearsinhiseyesbeforequietlyaskingifhecouldgotofindhisteachertoapologize. 51.Theboymadetroubleforhisteacherbecausehe. A.wasaccusedofdestroyingproperty B.wastoldnottoyellatotherchildren C.wasmadetodothingsagainsthiswill D.wasblamedforcreatinganairoftension 52.Whydidn'ttheauthordoanythingabouttheboy'sbadbehavioratfirst? A.Shedidn'twanttomakeitworse. B.Shedidn'tmindthehugemessatall. C.Shewastiredofshoutingandthreats. D.Shehadn'tthoughtofacopingstrategy. 53.Theauthormanagedtogettheboytotalktoherby. A.playinggameswithhim B.givinghimagoodsuggestion C.describinghisteacher'sfeelings D.avoidingmakingcriticalremarks 54.Whydidtheboyhavetearsinhiseyesintheend? A.Hewassorryabouthisreputation. B.Hewasregretfulabouthisbehavior. C.Hewasfearfuloftheauthor'swarning. D.Hewassadfortheauthor'smisunderstanding.
8分HalfayearbeforegraduationfromcollegemysonDavidbegantoseekajob.Duetothefinancialcrisisthecompetitionwasever﹣fierce.Mysontargetedacompanythatwaslocatedinacoastalcity.ItwasintendedtoemployonlyonepersonamongmorethantwentycandidatesIsaidtoDavidYoushouldnotharbortoomuchhopeforfearthatyouwouldfeelterriblydisappointedwhenyoufail.HesaidtomeIamnotafraidofdisappointment.AslongasItrytherewillalwaysbehope! Threeyoungmencouldenterthefinalroundwhichwouldlaterdecideonepersontobeemployed.EverythingseemedtogoquitewellandDavidenteredthefinalroundinaweek. Unexpectedlytheinterviewwasunbelievablysimpleduringwhichtheintervieweronlychattedwiththemforawhile.Theinterviewstrategiesmysonpreparedwerenotusefulatall.Theinterviewersaidthecompanywouldinformthemoftheresultin3days.OnthemorningofthethirddayDavidreceivedthetextfromthecompanythathewasnotemployed.Davidfeltdisappointed. InnightfallthatdayDavidsuddenlytoldmeexcitedlyonphonethathehadbeenemployed.GreatlysurprisedIaskedhimWhat'sthewholematter?Davidtoldmethathereceivedanothertextsayingthathewasemployed.Davidfeltveryconfusedaboutit.Laterhefoundoutthefirsttextsenttohimwasalsopartofthetestintheinterview.ThreemenreceivedthesametextthismorningandonlyDavid'sreplywassatisfyingtothecompany.IaskedmysonHowdidallofyourreply?MysonsaidOnedidnotreply.Theothersaid‘Goodbye'andIsaid‘Thankyou'. OnlythendidIknowthatmyson'shopecameinthatway.ThatiswhenyoufeeldisappointeddonotforgettosayThankyoutotheonewhodisappointsyou.ActuallyitisapieceofcaketosayThankyou.SayingThankyoushowsrespectforothers'workanddemonstratesyourgrandgenerosity.Thereforewhileunderthesameconditionyouwillgettheupperhandintermsofopportunitiescomparedwithothers! 28.WhatcanwelearnaboutDavidfromthepassage? A.BeingshortofmoneyDavidwaseagertofindajob. B.Hewantedtoworkforacompanyinthelocalcity. C.Hewasnothopefulofgettingthejob. D.Hetookapositiveattitudetowardsfailure. 29.WhichofthefollowingistrueaboutDavid'sfinalroundinterview? A.Davidwasnervousbecausethecompetitionwasreallyfierce. B.David'spreparationsfortheinterviewwerenotused. C.Thethreeyoungmenperformedequallywell. D.Theresultwasannouncedonthespot. 30.WhenDavidgotthejobofferhefeltatfirst. A.excitedB.puzzledC.nervousD.pleased 31.Whatcanbethebesttitleofthepassage? A.SunshineAlwaysAppearsAfterStorm B.NeverGiveUpHope C.TheMagicPowerofThankYou D.AYoungManAndHisHope.
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accountfor.
10分请你修改下面短文共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏子符号∧并在其下面写出该加的词. 删除把多余的词用\划掉. 修改在错的词下画一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Peopleusedtocommunicatewitheachotherthroughlettersandpublicphones.SonowadaystheyusemobilephonesandtheInternetinsteadof.Thischangeincommunicationhavegoodeffectsonourworksandlife.ComparingwithlettersandpublicphonesmobilephonesandtheInternetarefastandmuchmoreconvenient.Ifyoumissedyourgrandmotheryoujusttakeoutyourphoneandsayhellotohim.Andshewillbehappytohearyourvoice.Ifyouwanttoplaceorderwithaforeigncompanyyoucane﹣mailthemessage.It'llbeminutesafteryougettheirreply.
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1分Nodon'ttellthemanything.Anyhowtheydidn'ttrustme.Theydon't84anexplanation.
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6分AlongtheriverbanksoftheAmazonandtheOrinocotherelivesabirdthatswimsbeforeitcanflyflieslikeafatchickeneatsgreenleavehasthestomachofacowandhasclawsonitswingswhenyoung.Theybuildtheirhomesabout4.6mabovetheriveranimportantfeatureforthesafetyoftheyoung.Itiscalledthehoatzin. Inappearancethebirdsofbothsexeslookverymuchalikewithbrownonthebackandcreamandredontheunderside.Theheadissmallwithalargesetoffeathersonthetopbrightredeyesandblueskin.Itsnearestrelativesarethecommonbirdscuckoos.Itsmoststrikingfeaturethoughisonlyfoundintheyoung. Babyhoatzinshaveaclawontheleadingedgeofeachwingandanotherattheendofeachwingtip.Usingthesefourclawstogetherwiththebeak喙theycanclimbaboutinthebusheslookingverymuchlikeprimitivebirdsmusthavedone.Whentheyounghoatzinshavelearnedtoflytheylosetheirclaws. DuringthedriermonthsbetweenDecemberandMarchhoatzinsflyabouttheforestingroupsof20to30birdsbutinAprilwhentherainyseasonbeginstheycollecttogetherinsmallerlivingunitsoftwotosevenbirdsforproducingpurposes. 21.Whatisthetextmainlyabout? A.Hoatzinsindryandrainyseasons. B.Therelativesandenemiesofhoatzins. C.PrimitivebirdsandhoatzinsoftheAmazon. D.Theappearanceandlivinghabitsofhoatzins. 22.Younghoatzinsaredifferentfromtheirparentsinthat. A.theylooklikeyoungcuckoos B.theyhaveclawsonthewings C.theyeatalotlikeacow D.theyliveonriverbanks 23.Whatcanweinferaboutprimitivebirdsfromthetext? A.Theyhadclawstohelpthemclimb. B.Theycouldflylongdistances. C.Theyhadfourwingslikehoatzins. D.Theyhadaheadwithlongfeathersonthetop. 24.Whydohoatzinscollecttogetherinsmallergroupswhentherainyseasoncomes? A.Tofindmorefood. B.Toprotectthemselvesbetter. C.Tokeepthemselveswarm. D.Toproducetheiryoung.
下列有关化学用语使用正确的是
1分指出下列句子属于哪种基本句型.回答可写汉字 IsawMrWanggetonthebus..
10分Michael'sbirthdaywascomingsoonsoheaskedhisdadforabicyclesothathewouldn'thavetowalktoschoolanymore.36Michaelgotabookinsteadbuthedidnotcomplain抱怨. OnebrightandsunnydaywhileMichaelwaswalkingpastabookstoreonhiswaytoschoolhesawabigboyonabike.Thebikewastoosmallfortheboy.37TheboywasastudentinMichael'sschool.Michaelrecognizedhim.Theboy'snamewasWilliam.Hislegseemedtohavebroken.MichaelpickedupWilliam'sbikewhichwasnotdamagedandrodetothenearbyhospitaltogethelp38.MichaelrodeWilliam'sbiketoschoolsohewouldnotbelateforclass. AfterschoolMichaelquicklyrodethebicycletoWilliam'shousewithabookforhim.39Buthehadtoputsomemedicineonhislegandstayinbedforsometime. ToMichael'ssurpriseWilliamwasgettinganewbikeforhisbirthdayintwomonthssoheletMichaelhavehisoldbike.Michaelwasoverjoyed喜出望外. 40MichaelvisitedWilliameverydayuntilWilliams'slegwasbetter. A.LuckilyWilliamwasnotseriouslyhurt. B.Michaelfounditinterestingandcouldn'thelplaughing. C.FromthenonMichaelandWilliambecamegoodfriends D.WilliamgavehisnewbiketoMichaeltoshowhisthanks. E.HoweverMichael'sdadhadlosthisjobanddidnothavemuchmoney. F.Astheboywasturningaroundacornerthebikecrashedintoatree. G.Afewminuteslateranambulance救护车cameandtookWilliamtothehospital. 36. 37. 38. 39. 40.
cutdown.
7.5分Howtomanageyouremailinbox36Weloveitandwehateit.Weneeditandwewantitbuttoooftenthepricewepayiscompleteemailoverload.Ascertainasthesunwillriseourinboxeswillbefullbymid﹣morning. Honestlywe'vedoneittoourselves.Wedependtoomuchonittocommunicateandasaresulthavemadeourselvespayattentiontoeveryoneofthem.Thisisterrible.37Everytimeanemailinterruptsyouitcoststimemoneyandbrainpower. Herearesomeofmybesttipstomanageemails 38Youcan'tgetintoworkifyoucheckemailseverytenminutes.Insteadyoushouldsetcertaintimestocheckyourinboxlikethetopofeveryhourorevery90minutes.Setatimeronyourphoneandsticktoit. Scanyourinbox.39Atthesametimedeleteeverythingthatisunnecessaryandanswertimelyrequestsfirst. 40Insteadofcreatinganemailtryspeakingwiththepersonyouwanttocommunicatewith.Oftenafive﹣minuteconversationonthelineismuchbetterthananemail. A.Emailisbecomingmoreandmoreimportantinourlives. B.Setaschedule. C.Emaiiisourfriendandtheenemy. D.Lookingthroughtheemailsquicklycansaveyourtime. E.Becauseemaiicaninterruptourworkandlife. F.Useaphone. G.Talktotheperson. 36. 37. 38. 39. 40.
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6分FiveyearsagoDavidSmithworeanexpensivesuittoworkeveryday.Iwasaclothesaddict迷hejokes.IusedtocarryafreshsuittoworkwithmesoIcouldchangeifmyclothesgotwrinkled皱的.TodayDavidwearscasualclothes﹣khakipantsandasportsshirt﹣totheoffice.Hehardlyeverwearsanecktie.I'mworkingharderthaneverDavidsaysandIneedtofeelcomfortable.Moreandmorecompaniesareallowingtheirofficeworkerstowearcasualclothestowork.IntheUnitedStatesthechangesfromformaltocasualofficewearhavebeenslow.Intheearly1990smanycompaniesallowedtheirworkerstowearcasualclothesonFridaybutonlyonFriday.Thisbecameknownasdress﹣downFridayorcasualFriday.Whatstartedoutasanextraone﹣day﹣a﹣weekbenefitforworkershasreallybecomeaneverydaythingsaidbusinessadviserMaislyJones. Whyhavesomanycompaniesstartedallowingtheirworkerstowearcasualclothes?Onereasonisthatitseasierforacompanytoattractnewworkersifithasacasualdresscode.Alotofyoungpeopledon'twanttodressupforworksaystheownerofasoftwarecompanysoit'shardtohirepeopleifyouhaveaconservativedresscode.Anotherreasonisthatpeopleseemhappierandmoreproductivewhentheyarewearingcomfortableclothes.InastudymadebyLeviStraussandCompany85percentofemployerssaidthatcasualdresshasapositiveeffectonwork.Supportersofcasualofficewearalsosaythatacasualdresscodehelpsthemsavemoney.Suitsareexpensiveifyouhavetowearoneeverydayonepersonsaid.Forthesameamountofmoneyyoucanbuyalotmorecasualclothes. 28.DavidSmithreferstohimselfashavingbeenaclothesaddictbecause. A.heoftenworekhakipantsandasportsshirt B.hecouldn'tstandacleanappearance C.hewantedhisclothestolooktidyandcleanallthetime D.hedidn'twanttospendmuchmoneyonclothes 29.Thereasonwhycompaniesallowtheirworkerstowearcasualclothesareasfollowsexceptthat. A.manyworkersdon'tlikeaconservativedresscode B.comfortableclothesmakeworkersmoreproductive C.acasualclothescodeiswelcomedbyyoungworkers D.alltheemployersintheU.S.areforcasualofficewear 30.Accordingtothispassagedress﹣downFridaymeansthat. A.onFridaycompanieswillgivetheirworkersanextrabenefit B.onFridaydress﹣downhasbecomeaneverydayphenomenon C.onFridaycompaniesallowtheirworkerstowearcasualclothesasafavor D.onFridaymanyworkerswanttowearcasualclothestoimpresspeople 31.Whichofthefollowingclothesiscasualwear? A.Khakipants. B.Suits. C.Neckties. D.Tuxedos.
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