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已知常数a>0,函数f(x)=的图象经过点P(p,),Q(q,).若2p+q=36pq,则a= .
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高一上学期数学《》真题及答案
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如图已知一次函数y=kx+b的图象经过点P32与反比例函数y=x>0的图象交于点Qmn.当一次函数y
已知反比例函数k为常数k≠0的图象经过P.33过点P.作PM⊥x轴于M.若点Q.在反比例函数图象上并
已知函数fx=ax+其中ab为常数的图象经过122两点.1求函数fx的解析式2判断fx的奇偶性.
已知函数fx=logax+1a>1若函数y=gx图象上任意一点P.关于原点对称的点Q.的轨迹恰好是函
已知命题p函数y=logaax+2aa>0且a≠1的图象必过定点-11命题q如果函数y=fx-3的图
“p∧q”为真
“p∨q”为假
p真q假
p假q真
若直角坐标平面内两点PQ满足条件:①PQ都在函数fx的图象上;②PQ关于原点对称则称点对PQ是函数f
0
1
2
4
在平面直角坐标系中一次函数y=kx+bkb都是常数且k≠0的图象经过点10和02.1当﹣2<x≤3时
已知命题p函数y=logaax+2aa>0且a≠1的图象必过定点-11命题q如果函数y=fx-3的图
“p且q”为真
“p或q”为假
p真q假
p假q真
已知函数fx=|x-3|gx=-|x+4|+m.1已知常数a02若函数fx的图象恒在函数gx图象的上
已知函数fx=a≠0是奇函数且函数fx的图象经过点13求实数ab的值.
已知函数fx=的图象过点和点.1求函数fx的最大值与最小值2将函数y=fx的图象向左平移φ0<φ<π
在平面直角坐标系xOy中抛物线经过点0–32–3.1求抛物线的表达式2求抛物线的顶点坐标及与x轴交点
已知向量a=cosωx+sinωxsinωxb=-cosωx+sinωx2cosωx设函数fx=a·
如图已知反比例函数y=m≠0的图象经过点14一次函数y=﹣x+b的图象经过反比例函数图象上的点Q.﹣
已知反比例函数y=m为常数的图象经过点A.-16.1求m的值2如图9过点A.作直线AC与函数y=的图
已知指数函数fx=axa>0且a≠1的图象经过点﹣12.1求a2若gx=fx﹣4求函数gx的零点.
已知反比例函数k为常数k≠0的图象经过P.33过点P.作PM⊥x轴于M.若点Q.在反比例函数图象上并
已知函数fx=ax3+bx2+cabc∈Ra≠0.1若函数y=fx的图象经过点00-10求函数y=f
已知定理若ab为常数gx满足ga+x+ga-x=2b则函数y=gx的图象关于点ab成中心对称.已知函
已知fx=logax+1点P是函数y=fx图象上任意一点点P关于原点的对称点Q的轨迹是函数y=gx的
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Asimplelifemeansgettingridofmanyofthethingsyoudosothatyoucanspendmoretimewithpeopleyouloveanddothethingsyoulove.1It'softenajourneyoftwostepsforwardandonebackward. Evaluateyourtime.2Whatthingsdoyoudofromthetimeyouwakeuptothetimeyougotosleep?Makealistandevaluatewhetherthey'reinlinewithyourpriorities.Ifnotremovethemandfocusonwhat'simportant.Redesignyourday. Limityourcommunications.OurlivesthesedaysarefilledwithavastflowofcommunicationsemailcellphonespapermailTwitterforumsandmore.3Insteadsetalimitonyourcommunicationsonlydealwithemailsatcertaintimesoftheday.Limitphonecallstocertaintimestoo.Itisthesamewithothercommunications.Setascheduleandsticktoit. Trylivingwithoutacar.OKthisisn'tsomethingI'vedonebutmanyothershave.4Walkbikeortakepublictransportation.Itreducesexpensesandgivesyoutimetothink.Acarisalsoverycomplicatedneedingnotonlycarpaymentsbutinsurancemaintenancerepairsgasandmore. 5Ifyouridyourhomeofstuffyoumightfindyoudon'tneedsomuchspace.I'mnotsayingyoushouldliveonaboatalthoughIknowsomepeoplewhohappilydosobutifyoucanbecomfortableinasmallerhomeitwillnotonlybelessexpensivebuteasiertomaintainandgreatlysimplifyyourlife. A.Considerasmallerhome. B.Haveaplaceforeverything. C.Howdoyouspendyourday? D.It'ssomethingIwoulddoifIdidn'thavekids. E.Theycantakeupyourwholedayifyouletthembe. F.Howevergettingtosimplicityisn'talwaysasimpleprocess. G.Mostpeopledon'tknowwhatenoughisandthustheykeepbuyingmore.
WilliamButlerYeatsamostfamousIrishwriterwasborninDublinonJune131865.Hischildhood1theharmonythatwas2ofahappyfamily.LaterYeatsshockedhisfamilybysayingthatherememberedlittleofchildhoodbutitspain.Infacthe3excellenttasteinartfromhisfamily﹣bothhisfatherandhisbrotherwerepainters.Buthefinally4literature5dramaandpoetry. Yeatshadstrong6inthecomingofnewartisticmovements.Hesethimselfthe7taskinfoundinganIrishnationaltheatreinthelate1890s.Hisearlytheatricalexperiments8werenotreceived9atthebeginning.Hedidn'tloseheartandfinallyenjoyed10inhispoeticaldrama. 11withhisdramaticworksYeats'spoemsattractmuch12notice.Thesubjectmatterincludeslovenaturehistorytimeandaging.ThoughYeatsgenerallyreliedonverytraditionalformshebroughtmodern13tothem.Ashisliterarylife14hispoetrygrewfinerandricherwhichledhimtoworldwide15. Hehadnot16amajorpubliclife17winningtheNobelPrizein1923.Yethecontinuedwritingalmosttotheendofhislife.HadYeatsstoppedwritingatage40hewouldprobablynowbe18asaminorpoetforthereisnootherexampleinliteraryhistoryofapoetwho19hisgreatestworksbetweentheagesof50and75.AfterYeats'sdeathin1939W.H.Audenwroteamongothersthefollowinglines Earthreceivean20guest WilliamYeatsislaidtorest. LettheIrishvessel船lie. Emptiedofitspoetry. 1A.held B.lacked C.expected D.desired 2A.typical B.special C.awkward D.capable 3A.inherited B.developed C.abandoned D.formed 4A.carriedon B.decidedon C.puton D.basedon 5A.regularly B.instantly C.particularly D.finally 6A.desire B.energy C.access D.faith 7A.fresh B.stupid C.small D.difficult 8A.therefore B.however C.besides D.furthermore 9A.possibly B.honorably C.favorably D.doubtfully 10A.failure B.fame C.pleasure D.success 11A.Connected B.Occupied C.Compared D.Tired 12A.admiring B.amusing C.amazing D.envying 13A.potential B.sensibility C.possibility D.benefit 14A.finished B.produced C.created D.progressed 15A.praise B.spread C.recognition D.assessment 16A.enjoyed B.accepted C.purchased D.taken 17A.before B.since C.until D.after 18A.respected B.admired C.valued D.favored 19A.prohibits B.attempts C.recommends D.produces 20A.appealed B.advocated C.advanced D.honored
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设x为实数则“x<0”是“”的
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OnNovember7LewisPughcompletedaone﹣kilometerswiminthefreezingwatersofKingEdwardCoveoffSouthGeorgiainAntarctica.Hewaswearingonlyhisswimmingglassescapandspeedos! Pughisanadvocateforouroceansandseasworkingtoprotecttheseecosystemwiththeirlargediversityofmarinelife.Whenaskedwhyhedoesn'twearawetsuitLewissaysIaskworldleaderstodoeverythingtheycantoprotectouroceans.Sometimesthestepstheyneedtotakearedifficultandunpopular.IfI'maskingthemtobecourageousImustalsobe.Swimminginawetsuitwouldnotsendtherightmessage. IttookPughabout19minutestocompletetheone﹣kilometerswiminAntarcticawherethewateraveragedabout1.6degreesCelsius.Hesaysthathisbodycanonlytolerateabout20minutesinthefreezingwatersbeforeitstartsshuttingdown.Asheswimshisbodytemperaturesteadilydropswhichinturncauseshismusclecontroltodropslowinghimdown.Whenheisdonewithhisswimhissupportteamrusheshimtoahotshowerandittakesalmostanhourforhisbodytemperaturetoreturntonormal. DoctorsandPughcautionthatonemustreceivemonthsoftrainingtoswiminsuchcoldwaters.Evenexpertswimmerswhoareunusedtofreezingwatercandrownwithinminutesbecauseofthephysicalshockexperiencedbythebody.Pughsayshetrainedforsixmonthsbeforethisswim. ThisisnotthefirsttimethatLewishasswumindangerousconditions.In2007heswamonekilometerintheNorthPoletodrawattentiontothemeltingArcticiceduetoclimatechange.In2015heswamintheBayofWhalesinAntarctica'sRossSeaaspartofhissuccessfulcampaigntohelpsetupamarinereservethere. 1WhydidLewisPughswimwithoutawetsuit? A.Toswimfaster. B.Toshowhisbravery. C.Tobuilduphisbody. D.Towinpublicattention. 2WhatdoestheunderlinedworditinParagraph3referto? A.Hisbody. B.Thewater. C.Hisbodytemperature. D.Thewatertemperature. 3What'sPugh'sadviceaboutswimminginfreezingwaters? A.Onemustbefullyprepared. B.Oneshouldbeexpertatswimming. C.Oneshouldbereadytotakeonchallenges. D.Onemustbeusedtolong﹣distanceswimming. 4Whatmaybethebesttitleforthetext? A.LewisPughswimmingforacause B.Howtosurviveaswimincoldwaters C.Howtoprepareforextremeswimming D.LewisPughachievingtheimpossible
过抛物线y2=4x焦点F的直线交抛物线于AB两点分别过AB作准线l的垂线垂足分别为CD.若|AF|=4|BF|则|CD|=.
WhenHuangLizhitookherfirstclassinAfricansociologyattheUniversityoftheWitwatersrandinSouthAfricainFebruaryherprofessoraskedherandherclassmateswhatimpressesthemmostwhenitcomestoAfrica. UnexpectedlyHuang31foundthatwordslikepovertyandsafari﹣negativewordsthatwereoftenassociatedwiththecontinentinmediareports﹣werethekindoftermsherAfricanclassmatesdidn'twanttohear.InsteadtheypreferredtohearthequestionansweredinthiswayAfricaisthecradleofhumankindandAfricansarepassionateandgenerous. Apparentlytherearesomemisunderstandingsbetweenus.It'struethatwithincidentsliketheEbolaoutbreakinWesternAfricaandtheemergence出现ofpiratesoffthecoastofSomaliahittingthenewsit'seasyforustokeepforgettingthatAfricahasoneoftheworld'soldestcivilizations﹣Egyptbornbytheworld'slongestrivertheNile.TheproofisintheGreatPyramidofGizaandtheGreatSphinxofGizawhicharebothpopularamongtourists.AndthetombsofancientEgypthavealsobecomeendlesssourcesfortheliteratureandfilmindustries. WhenitcomestothenaturalenvironmentofAfricaourmisunderstandingsareonlybigger.Butthetruthisthatinsteadofbeingextremelyhotallyearandcoveredbydesertthecontinenthaslargeareasofsavannas稀树草原wherelionsgiraffesandzebraslivethesnowcappedKilimanjaro﹣thehighestmountaininAfrica﹣andeventhickforestontheislandofMadagascar.Thesemisunderstandingsareoneofthereasonswhythe2018BeijingSummitoftheForumonChina﹣AfricaCooperationwasheldonSept3and4﹣tounderstandeachotherbetter. IndeedonlybyvisitingAfricaherselfdidHuangseetheconvenientlivingconditionstheamazingnaturalbeautyandthefriendlypeople.InhereyesherclassmateswereashopefulaboutthefutureoftheirowncountriesastheywereaboutAfricaasawholeandtheywerequicktodemonstrateboththeirstrongwillandactivity.AtthatmomentIknewexactlywhattheywanted﹣theywantedtheirculturetoberespected. 1Whichofthefollowingbestexplainscradleunderlinedinparagraph2? A.Asmallbedforbabies. B.Abaskettoholdsomething. C.Aplaceforpeopletorelaxthemselves. D.Aplacewheresomethingimportantbegan. 2WhatcanweinferaboutAfricaaccordingtothepassage? A.Itisveryhotalltheyearround. B.It'snotasafecontinenttolivein C.It'sdifferentfromwhatweimagine. D.Itisboundtohaveabrightfuture 3WhichofthefollowingwouldHuangagreewith? A.Toseeistobelieve B.Thinktwicebeforeyoudo C.Amissisasgoodasamile D.Don'tjudgeapersonbyhisappearance 4Whatcanbeasuitabletitleforthetext? A.ValuingaCulture. B.UnderstandingAfrica. C.PayingaVisittoAfrica. D.DiscoveringaContinent.
Haveyoucomplained1yourfamilyyourbossorevenyourlife?Maybeeveryonehasbutafterreadingthisstoryyoumaychangeyourviewandtreattheworldwithanotherattitude. Anass驴2belongtoanherb﹣sellerwhogavehimtoolittlefoodandtoomuchworkcouldnotbearthelifeanylonger.SohemadearequesttoGodtobereleasedfromhispresentserviceandprovidedwith3master.Afterwarninghim4hewouldregretdoingitGodmadehimtobesoldtoatile﹣maker.Shortlyafterwardstheassfoundthathehad5heavyloadstocarryandharderworkinthebrick﹣fieldandaskedforanotherchangeagain.Godtellinghimthatitwouldbe6lasttimethathecouldsatisfyhisrequestmadehimsoldtoatanner皮革工.Theassfoundthathe7fallintoworsehands.Knowinghisnewmaster'soccupationhesaidItwouldhavebeenbetterformeeithertohavebeenstarvedbythefirstowner8tohavebeenoverworkedbythesecond.ButnowIhavealreadybeenboughtbymypresentowner9willpeeloffmyskinevenafterIamdeadandmakemeuseful. Wecanseethatpeoplewithdissatisfactioninaplacearenot10liketofindhappinessinanother.
某几何体的三视图如图所示则该几何体的体积为
Organic有机的farmingisatypeofagriculturethatbenefitsfromtherecyclinganduseofnaturalproducts.Useofdriedplantsnotonlysavesmoneybutalsoensuresthegrowthofcrops.Thetechniqueischaracterizedbytheuseofgreenmanure肥料biologicalpestcontrolmethodsandspecialfarmingtechniquestokeepsoilproductive.Limitingtheuseofman﹣madechemicalsorcompletelydoingawaywiththemreducestheriskofdiseases.Todayorganicfarmingisamajorandpreferredindustryaroundtheworld.Organicallygrownfoodproductshaveahugemarketwithfarmlandscoveringabout10%ofthetotalworld﹣farmlandcover.ThehardworkofSirAlbertHowardtheFatherofOrganicFarminghaspaidoff. AdvantagesofOrganicFarming 1Theeconomicsoforganicfarmingarecharacterizedbyincreasingprofitsthroughreducedwateruseandreducedsoilerosion侵蚀. 2Organicfarmingproducesthesamecropsasthoseproducedthroughtraditionalfarmingmethodsbutuseshalftheenergyandholds40%moretopsoil 3Farmingtheorganicwayenablesfarmerstogetridofweedswithouttheuseofanychemicals. 4Theuseofgreenpesticides杀虫剂isenvironmentallyfriendlyanddoesnoharmtohuman'shealth. DisadvantagesofOrganicFarming 1Organicmethodsoffarmingproducelesscomparedtotraditionalfarmingtechniques. 2Organicagriculturedoeslittletofightglobalclimatechange.ThoughorganicfarmingpracticesarerecognizedasgivingoutlessCO2butnottoasignificantdegree. Howeverthoughtherearesomedisadvantagesoforganicfarmingfarmswhereorganicmethodsforcroppinghavebeenusedhavemoreadvantagesthantraditionalfarms.Organicagricultureissurelybetterinthelongterm. 1TheunderlinedsentenceinParagraph1showsthatSirAlbertHoward. A.workedhardfornothing B.succeededinorganicfarming C.spentallhistimeonorganicfarming D.didn'texpectorganicfarmingtobesuccessful 2Accordingtothepassagecomparedtotraditionalfarmingorganicfarming. a.ismoreenvironmentallyfriendly b.producesalotmorefood c.useslessenergy d.resultsinmoreweedsinthefarmland e.isbetterforhuman'shealth A.abc B.acd C.ace D.bce 3Theauthor'sattitudetowardsorganicfarmingis. A.anxious B.hopeless C.unclear D.optimistic 4Thewriterwrotethispassagetotellus A.thedevelopmentofagriculture B.whatkindoffoodisbeinggrownatpresent C.whyorganicfarmingissopopulararoundtheworld D.whatorganicfarmingisanditsadvantagesanddisadvantages
已知四边形的顶点ABCD在边长为1的正方形网格中的位置如图所示则=.
目前你校有许多学生因为各种原因很少参加体育锻炼假定你是张华请你就此事向你校英语报写一封信倡导同学们积极参与体育锻炼. 内容包括 1.学生们不参加体育活动的原因 2.进行体育活动的好处. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.文章开头和结尾语已给出不计入总词数. Dearschoolmates Nowadaysmoststudentsdon'tdosportsforkindsofreasons.
设复数z满足1+iz=2i则|z|=
已知函数fx=xex﹣m≥0. Ⅰ当m=0时求函数fx的极小值 Ⅱ当m>0时讨论fx的单调性 Ⅲ若函数fx在区间﹣∞1上有且只有一个零点求m的取值范围.
已知a1a2…an…是由正整数组成的无穷数列对任意n∈N*an满足如下两个条件 ①an是n的倍数 ②|an﹣an+1|≤5. Ⅰ若a1=30a2=32写出满足条件的所有a3的值 Ⅱ求证当n≥11时an≤5n Ⅲ求a1所有可能取值中的最大值.
TimeTravel Ifyoucouldtravelintimewherewouldyougo?PerhapsyouwouldwatchanoriginalperformanceofaShakespeare'splayinElizabethanEngland?WhatabouthangingoutwithLaoziintheSpringandAutumnPeriod?Ormaybeyou'dvoyagefaraheadofthepresentdaytoseewhatthefutureholds. Thepossibilityoftimetravelisindeedappealing.Storiesexploringthesubjecthavebeenaroundforhundredsofyears.Perhapsthebestknownexampleissciencefictionnovel.TheTimeMachinewhichwaswrittenbyH.G.Wellsandpublishedin1895forthefirsttime.Itwasadaptedintoatleasttwofeaturefilmsofthesamenameaswellastwotelevisionversionsandalargenumberofcomicbookadaptations.Itisgenerallycreditedwiththepopularizationoftheconceptoftimetravelusingavehiclethatallowsanoperatortotravelpurposefullyandselectively.ThetermtimemachinecoinedbyWellsisnowuniversallyusedtorefertoavehicletransportingpeopleintothefarfuture. Butcouldtimetravelactuallybepossible?Somescientistssayyesintheory.Theyproposeusingcracksintimeandspacecalledwormholeswhichcouldbeusedasshortcutstootherperiods.Einstein'stheoryofrelativityallowstimetravelinextremecircumstances.AndBritishphysicistStephenHawkingsaysyoucouldtravelintothefuturewithareallyfastspaceshipgoingatnearlythespeedoflight.Thoughbuildingsuchaspaceshipwouldofcoursebenosimpletask. Evenifyoucouldtravelintothepastthereissomethingcalledthegrandfatherparadox.Itaskswhatwouldhappenifatimetravelerweretogobackintimeandhavehisowngrandfatherkilledforsomereasonandthereforepreventhimselffrombeingborn.Ifthetimetravelerwasn'tbornhowwouldhetravelbackintime? Andwouldyoureallyliketovisitthefuture?InH.G.Wells'bookthemaincharactertravelsintodistanttimewherehearrivesatabeachandisattackedbygiantcrabs.Hethenvoyages30millionyearsintothefuturewheretheonlylivingthingisablackobjectwithtentacles触角. Ifthat'swhat'sinstoremaybewearebetterjustlivinginthepresentdayafterall. 1ThenovelTheTimeMachinementionedinParagraph2aimstoshow. A.thecontributionofH.G.Wells B.thestory'sdifferentfeatures C.thelonghistoryoftimetravel D.people'sinterestintimemachine 2Einstein'sandHawking'stheories. A.suggestthepossibilitytoinventthetimemachine B.pushtheinventionofthefirstspaceship C.haveprovedwrongbysometimetravelers D.havesimilaritiesinmanyway 3InParagraph4grandfatherparadoxprobablyreferstotheideathat. A.thetravelerispreventedfrommeetinghisgrandfather B.thegrandfather'sdeathmakesthetraveler'sbirthimpossible C.thetravelergoesbackintimetoseekforhisgrandfather D.thereunionofthetravelerandhisgrandfatherbringshappiness 4Accordingtothepassagewhatisprobablytheauthor'sattitudetowardstimetravel? A.Skeptical. B.Unclear. C.Supportive. D.Unconcerned.
假定你是李华是你校音乐节的组织者之一.请你用英语给美国笔友Mike写一封邮件请他介绍一下他们学校的音乐活动并对你校音乐的组织提出建议. 注意1.词数100左右 2.可以适当增加细节以使行文连贯.
GreatholidaysinEurope! Doyoulikethebeachbutwantabitmore? ThencomeonanActiveBeachholidayatoneofourcentersinGreeceTurkeyorCroatia.Allthecentersarenearbeautifulbeachesandalloffersailingwindsurfingorwaterskiingwithourexcellentinstructors.Forachangefromthewateryoucanalsobookashorttriptoanearbyvillageandvisitthecolorfulmarketsoreatinalocalrestaurant.Attheendofthedayrelaxinyourhotelroomordancethenightawayatoneofouropen﹣airclubs. WhowasKingArthur?Wheredidhelive? Joinusonafive﹣dayUKRoadTripholiday.ImaginelifehundredsofyearsagoaswevisitancientStonehengeRomanBathandTintagelCastlethehomeofKingArthur.Learnthehistoryoftheseinterestingplacesfromyourguideasyoutravelinoneofourfamousbluecoaches.Intheeveningswestopatsomeofthebestyouthhostelsinthecountry.Theyhaveeverythingyouneedyoudontevenneedtopackasleepingbag! Areyouboredwiththeusualholidays?Doyouwanttodosomethingyoureallyenjoy? ThenFameCampisforyou!SpendaweekatHightreeHouseinYorkshireandlearnhowtoplaythepianoviolinandguitar!Bringyourtentandstayatacampsitenearthehouse.Attheendoftheweektryyournewskillsinaliveperformance. Howmanycountriescanyouseein21days? OnourExploreEuropeholidayyoucanseeten!Learnaboutthemfromourbestguidesasyouwatchthemgopastfromthewindowofanair﹣conditionedcoachandstayatsomeofEurope'stopcampsitesontheway.Ofcoursewe'llalsohavetimetodotheimportantthingssuchasvisitingtheEiffelTowerinParisthehistoricSistineChapelinVaticanandeatingappleѕtrudеlіnVіеnna. Formoreinformationaboutanyoftheseholidayscall08453334523orvisitwww.comewithusuk.com. 1TouristswhogoonanActiveBeachholiday. A.candosomewatersports B.cancookbythemselves C.willenjoyanopen﹣airconcert D.shouldbringtheirownsleepingbags 2IfyouwanttoknowmoreaboutTintagelCastlewhichholidayshouldyoutake? A.FameCamp. B.ActiveBeach. C.UKRoadTrip. D.ExploreEurope. 3WhatcanwelearnaboutExploreEurope? A.Itlasts10days. B.Itisacoachtour. C.Itisaself﹣guidedtour. D.Itgoespast21countries.
在平面直角坐标系xOy中过A44B40C04三点的圆被x轴截得的弦长为
如图圆柱的底面半径为r球的直径与圆柱底面的直径和圆柱的高相等圆锥的顶点为圆柱上底面的圆心圆锥的底面是圆柱的下底面.则圆柱的表面积圆锥球圆柱的体积比分 别是
如图以正方形的各边为底可向外作四个腰长为1的等腰三角形则阴影部分面积的最大值是.
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