首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
向量=(3,2),=(﹣1,2),=(4,1): (1)求满足=m+n的实数m,n; (2)若(+k)∥(2﹣),求实数k.
查看本题答案
包含此试题的试卷
高一下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
已知整数对按如下规律排成一列:11122113223114233241则第60个数对是
(7,5)
(5,7)
(2,10)
(10,1)
已知整数对按如下规律排成一列11122113223114233241则第60个整数对是
(7,5)
(5,7)
(2,10)
(10,1)
Whatisthecontrapositiveoftherelationrepresentedint
R={<1,2>,<1,3>,<1,4>,<1,5>}
R={<1,1>,<2,2>,<3,3>,<4,4>,<5,5>}
R={<2,1>,<4,1>,<2,2>,<1,3>,<3,2>,<1,4>,<4,4>,<5,4>}
R={<1,2>,<3,1>,<1,4>,<2,2>,<2,3>,<4,1>,<4,4>,<4,5>}
已知整数对的序列如下111221132231142332411524则第60个数对是.
观察下列数对111221132231142332411524那么第32个数对是
(4, 4)
(4, 5)
(4, 6)
(5, 4)
已知向量a=12向量b=-32当k为可值时1ka+b与a-3b垂直.2ka+b与a-3b平行.
平面内给定三个向量a=32b=-12c=41d=xy满足d-c∥a+b且|d-c|=求d.
已知整数对按如下规律排列11122113223114233241则第70个整数对为
(3,9)
(4,8)
(3,10)
(4,9)
已知整数对的序列如下111221132231142332411524则第57个数对是.
已知整数对的序列如下111221132231142332411524则第60个数对为
已知整数对的序列如下111221132231142332411524则第60个数对是.
已知整数对按如下规律排成一列11122113223114233241则第60个整数对是
(7,5)
(5,7)
(2,10)
(10,2)
已知数对按如下规律排列11122113223114233241则第60个数对是_________.
已知整数对的序列如下111221132231142332411524则第57个数对是
已知整数对的序列如下11122113223114233241则第2011个数对是
已知整数对按如下规律排成一列11122113223114233241则第2014个数对是
(3,61)
(3,60)
(61,3)
(61,2)
已知向量a=12b=-32若ka+b与b平行则k=___
已知整数对按如下规律排成一列11122113223114233241则第60个数对是
平面内给定三个向量a=32b=-12c=41.试回答下列问题1若a+kc∥2b-a求实数k的值2设向
平面内给定三个向量a=32b=-12c=41请解答下列问题1求满足a=mb+nc的实数mn2若a+k
热门试题
更多
BillboardMusicAwardsoftheYear2015goestoTaylorSwiftasinger﹣songwriterwhohasshapedandinspiredtheAmericanmusicindustrywithhersuccess. WhenTaylorSwiftfirstcametopublicnoticeshewasa17﹣year﹣oldnewcomerwholovedsingingtoherownguitar.Shewasfarmoreenthusiasticthanskilledbutapparentlythrewsparkofsuperbtalent. FouryearslaterSwifthasbecomeamulti﹣awardswinnerwiththebiggestsellingalbums.ForherconsummateperformanceTaylorSwiftwasnamedBillboardmagazine'swomanin2011.SheistheyoungestartisttoreceivehonorsandseveralBillboardMusicAwardsamongthemTopCountryAlbumforthefive﹣timeplatinum白金sellingSpeakNowherthirdalbumthatwasreleasedthatyear. Taylorhasshownthepowerofgoodsongwritingwithmusicofstyles.saidBillWerdeBillboard'seditorialdirectorAndatsuchayoungageTaylorhasalreadymadeamajorimpactonmusicandhasbeenanunbelievablerolemodelforpromisingartistsandyoungwomaneverywhere. Swiftisusedtobreakingchartrecordsandwinninghonorssincehercareerstarted.Shefollowedthatupin2008withFearlesswhichestablishedherasaskilledsongwriterwithseveralhitsincludingLoveStoryYouBelongWithMeandWhiteHorse. Notsurprisinglythe6﹣timeplatinumFearlessisthemostawardedalbumincountrymusichistoryintheUSandheroverallworldwidesalesnowreach20millionalbumsand40millionsongsdownloads.SwifthasspentthepastyearontheSpeakNowWorldTourinsupportofherthirdalbumandnowshe'sgettingreadytogofurther. AccordingtoarecentinterviewwithTheNewYorkermagazineSwifthassofarwrittenabout10songsfora2016album.Shesaidthenewalbumisaboutfeelingsofgrowingupandbecominganadult. They'resadifI'mbeinghonest.SwifttoldTheNewYorker.They'reaboutmyheartbreaksandmymovingon.Butmoreimportantlytheyareaboutachievingcontentment.You'renotalwaysgoingtoberidiculouslyhappyasyougrowup. 1AsanewcomerintheshowbusinessTaylorSwiftwasconsideredtobe. A.askilledsongwriter B.anoutstandingartist C.anenergeticdirector D.apromisingtalent 2TheunderlinedwordconsummateinParagraph3canbestbereplacedby. A.confident B.professional C.excellent D.different 3Whatcanwelearnfromthepassage? A.SpeakNowisTaylorSwift'sthirdalbum. B.FearlessmarkedthebeginningofSwift'scareer. C.Swift'snewalbumisaboutfeelingsofgrown﹣ups. D.SwifthasgainedBillboardmagazine'swomantwice. 4Thispassageismainlyabout. A.ARisingMusicGenius B.Taylor'sHeartbreaksinGrowth C.AnInterviewwithTaylorSwift D.BillboardMusicAwardsinAmerica
修建隧道可以方便出行.如图AB两地被大山阻隔由A地到B地需要爬坡到山顶C地再下坡到B地.若打通穿山隧道建成直达AB两地的公路可以缩短从A地到B地的路程.已知从A到C坡面的坡度i=1从B到C坡面的坡角∠CBA=45°BC=4公里.1求隧道打通后从A到B的总路程是多少公里结果保留根号2求隧道打通后与打通前相比从A地到B地的路程约缩短多少公里结果精确到0.01≈1.414≈1.732
TheInternationalVoluntaryServicerunsnumberofYouthExchangesthroughouttheyear.YouthExchangesgivesmallgroupsof4﹣5youngpeopletheopportunitytotakepartinvolunteeringtripsabroadforanaverageoftwoweeks.Theseyoungpeopletheopportunitytotakepartinvolunteeringtripsabroadforanaverageoftwoweeks.Theseyoungpeoplearejoinedby4﹣5youngpeoplefrom3﹣4othernationalitiesandareawonderfulinterculturalexperienceinasafeenvironment. ExampleYouthExchanges YouthExchange1 LocationIreland OthernationalitiesIrelandSpainItalyHungary ThemeFocusesonthetopicofcommunityreconstructionandcommunityactivities﹣﹣﹣exploringhowlocalissuesfacingoutcommunitiesareconnectedtoglobalissues.Thegroupwillalsolearnabouttheeco﹣villageasanexampleofacommunityandtakepartinteam﹣buildingactivities. YouthExchange2 LocationFrance OthernationalitiesBulgariaItalyFrance ThemeOrganicgardening&continualliving.ThisprojectwilltakeplaceinanaturalparkWherethegroupwilltakepartingardeningactivitiesandgames/workshopsaboutcontinuousdevelopment. YouthExchanges3 LocationMacedonia OthernationalitiesSerbiaTurkeyIreland ThemeFoster培育socialinclusionandmotivatepersonaldevelopmentofyoungpeoplethroughsportandoutdooractivities.Promoteoutdooractivitiesasatooltohelpinclusionofyoungpeoplewithfeweropportunities. YouthExchange4 LocationItaly OthernationalitiesItalyBulgariaGreece ThemeAsocial﹣environmentalprojectthatintendstopromotesocialinclusionandcontinuousdevelopmentregardedasaprocessofcivilrightsandactivecitizenship.Over10daysthegroupwillparticipateinactivitiestoraiseawarenessabouttheeffectofourbehaviorontheenvironment. 1WhatdoyoufocusonwhentravellinginFrance? A.Gardeningwork B.Civilrights. C.Developingsocialinclusion. D.Rebuildingcommunities. 2Ifyouareinterestedinprotectingtheenvironmentyoucantakepartin. A.YouthExchange1 B.YouthExchange2 C.YouthExchange3 D.YouthExchange4 3WhichnationalityareYouthExchangesmostpopularwith? A.Spain. B.Italy. C.Ireland. D.France.
在环保督察中为落实“垃圾分类”环卫部门要求垃圾要按红黄绿三类分别装袋红类指废电池过期药品等有毒垃圾黄类指剩余食品的厨余垃圾绿类指塑料废纸等可回收垃圾小丽投放了一袋垃圾小芳投放了两袋垃圾这两袋垃圾不同类 1小丽投放的一袋垃圾恰好是红类的概率是 2求小芳投放的垃圾恰好有一袋与小丽投放的垃圾是同类的概率.
下列赋予4m实际意义的叙述中不正确的是
比1小3的数是
Whatabusyday!Thethreeboyswerefedbathedandchangedintotheirnightclothes.Maryhad1themastoryandfinallytheywereasleep.Babysitting照看thethreeboysagedeightsixandfourisextremely2shethought. SleepsheconsideredifonlyIcould!Butshehaddifficulthomeworktocomplete.Leaningbackshe3herfeetontothesofatogetcomfortable.Whoeversaidbabysittingwasan4waytomakemoneyobviouslyhadn'tmetthethreeboysshethought.Thetelevisionwasontheroomwaswarmandthelightsweredim.Mary's5feltheavierandheavier.Imustn'tsleepshethought﹣whichwas6whatshedidofcourse. Strangelyenoughshesoon7thatshewasaworldfamouschef主厨.Shemadea8andworediamondsanddesignerclothes.Mostdayssherelaxedbythepoolmeetingtherichandfamousor9﹣herfavoritehobby.She10tooktheleadingroleinherownTVshow. Thatisuntilshebecametoo11.Iamdefinitelythebestintheworldshethoughtasshepreparedatastychickendish.But12seemedtogoright.Shespilttheflourshedroppedaneggandshecutherfinger.Despiteallthetroublesshe13togetthechickenintothestove.Soonsmokeblanketedtheroom.Thechickenwasonfire.14setinbutMarycouldnotrun﹣shewas15tothespot.Shetriedhardtomovebutcouldnot16asharpsoundawokeher. Shegotshockedandconfused﹣17waspouringfromthekitchen.Rushingtoinvestigateshewasmetbythree18littlefacesandsomeveryburntbread.Sorrywewerehungryandyouwere19sowetriedtomakesomebreadexplainedaboy.RelievedMarymadethemasnackandsentthembacktobed.She20themnevertofallasleeponthejobagain! 1A.given B.written C.told D.taught 2A.successful B.helpful C.tiring D.surprising 3A.shook B.put C.bent D.kept 4A.difficult B.boring C.important D.easy 5A.eyes B.mind C.heart D.legs 6A.nicely B.exactly C.curiously D.carelessly 7A.realized B.reminded C.learnt D.dreamt 8A.decision B.fortune C.business D.plan 9A.cooking B.reading C.running D.babysitting 10A.just B.ever C.even D.only 11A.selfish B.proud C.stubborn D.sensitive 12A.everything B.something C.anything D.nothing 13A.tried B.arranged C.managed D.prepared 14A.Panic B.Pain C.Noise D.Stress 15A.frozen B.dragged C.pushed D.brought 16A.because B.until C.as D.unless 17A.smoke B.light C.water D.fire 18A.cheerful B.strange C.guilty D.confident 19A.busy B.hungry C.worried D.asleep 20A.promised B.allowed C.expected D.persuaded
InChinathehistoryofpeopleplantingandusingbamboocandatebacktoasfaras7000years.AsearlyastheShangDynastybamboowasbeingusedinancientpeople'sdailylives.Itwasusedforfoodclothinghousingtransportation1musicinstrumentsandevenweapons. The2applyofbambooinscienceandtechnologyisthrilling.In251BCLiBinginSichuan3leadthelocalpeopleinbuildingtheDujiangWeirs都江堰thefirstirrigationnetworkintheworldinwhichbambooplayed4importantrole.Theworld'soldestwaterpipewasalso5makeofbamboo.DuringtheHanDynastythepeopleinSichuan6successsanka1600﹣metre﹣deepwellwiththickbambooropes.ThistechnologydidnotspreadtoEurope7the19thcenturyanditwasbyusingthetechnology8theAmericansdrilledthefirstoilwellinPennsylvaniain1859. InChineseculturebambooiswell﹣knownas9ofthefourgentlemeninplants.Tomanyfamousmenbambooisasymbolofgoodnessandhonesty.Itisalwayscloselyrelatedtopeopleofpositivespirits.Bambooculturecontributestoencouragingpeopletoholdonwhen10facetoughsituations.
Myfatherwasalwaysagoodgardener.Oneofmyearliestmemoriesisstandingwithoutshoesinthefreshlytilled翻耕的soilmyhandsblackenedfromdiggingintheground. AsachildIlovedfollowingDadaroundinthegardenIrememberDadpushingthetiller耕作机aheadinperfectlystraightlines.Dadlovedgrowingallsortsofthingsyellowandgreenonionswatermelonsalmostasbigasmerowsofyellowcomandourfavorite﹣redtomatoes. AsIgrewintoateenagerIdidn'tgetsoexcitedaboutgardeningwithDad.Insteadofmagicallandofpossibilityithadturnedintosomekindofprison.AsDadgrewolderhisloveforgardeningneverdisappeared.AfterallthekidsweregrownandhadstartedfamiliesoftheirownDadturnedtogardeninglikeneverbefore.Evenwhenhewasdiagnosedwithcancerhestilltookcareofhisgarden. Butthenthecancerbitbybitinvadedhisbody.Ihadtodothethingsheusedtodo.WhatreallyconvincedmethatDadwasdyingwasthestateofhisgardenthatyear.Therowsandrowsofmulticoloredvegetablesweregone.Tootiredtoweedthemhesimplyletthembe.Heonlyplantedtomatoes. ForthefirstfewyearsafterhediedIcouldn'tevenbeartolookatanyone'sgardenwithouthavingstrongmemoriespourovermelikecoldwaterfromabucket.ThreeyearsagoIdecidedtoplantmyowngardenandstartedoutwithjustafewtomatoes.ThatmorningafterbreakingupafairamountofsoilsomethingcaughtthecomerofmyeyeandIhadtosmile.Itwasmyeight﹣year﹣oldsonNathanhappilyplayinginthefreshlytilledsoil. 1Whydidtheauthorlikethegardenwhenhewasachild? A.Thegardenwasplantedwithcolorfulflowers. B.Thegardenwasjustfreshlytilledbyhisfather. C.Helovedwhathisfathergrewinthegarden. D.Heenjoyedbeinginthegardenwithhisfather. 2Whenallthekidsstartedtheirownfamiliestheauthor'sfather. A.devotedmoretogardening B.turnedtootherhobbies C.stoppedhisgardening D.focusedonplantingtomatoes 3Whathappenedtothegardenwhentheauthor'sfatherwasseriouslyill? A.Theauthor'ssontookchargeofit. B.Noplantgrewinthegardenatall. C.Thegardenwasalmostdeserted. D.Itbroughttheauthoragreatharvest. 4Wecaninferfromthelastparagraphthat. A.theauthor'ssonplayedhappilyinthegarden B.theauthor'ssonremindedhimofhisownfather C.theauthor'ssonwasverygladtohelptheauthor D.theauthor'ssonwillcontinuegardeningaswell
如图所示一动点从半径为2的⊙O上的A0点出发沿着射线A0O方向运动到⊙O上的点A1处再向左沿着与射线A1O夹角为60°的方向运动到⊙O上的点A2处接着又从A2点出发沿着射线A2O方向运动到⊙O上的点A3处再向左沿着与射线A3O夹角为60°的方向运动到⊙O上的点A4处A4A0间的距离是…按此规律运动到点A2019处则点A2019与点A0间的距离是.
如图1菱形ABCD中∠ABC=120°P是对角线BD上的一点点E在AD的延长线上且PA=PEPE交CD于F连接CE. 1证明△ADP≌△CDP 2判断△CEP的形状并说明理由 3如图2把菱形ABCD改为正方形ABCD其他条件不变直接写出线段AP与线段CE的数量关系.
若分式的值为0则x的值是.
已知则A=
某商店有方形圆形两种巧克力小明如果购买3块方形和5块圆形巧克力他带的钱会差8元如果购买5块方形和3块圆形巧克力他带的钱会剩下8元.若他只购买8块方形巧克力则他会剩下元.
如图1在等边△ABC中点D是BC边的中点点P为AB边上的一个动点设AP=x图1中线段DP的长为y若表示y与x的函数关系的图象如图2所示则等边△ABC的面积为
小辉根据学习函数的经验对函数y=|x﹣1|的图象与性质进行了探究下面是小辉的探究过程请补充完整 1列表找出y与x的几组对应值. 其中b=在平面直角坐标系中画出该函数的图象 2写出该函数的一条性质.
如图正方形ABCD的边长为8M是AB的中点P是BC边上的动点连结PM以点P为圆心PM长为半径作⊙P. 1当BP=时△MBP~△DCP 2当⊙P与正方形ABCD的边相切时求BP的长 3设⊙P的半径为x请直接写出正方形ABCD中恰好有两个顶点在圆内的x的取值范围.
小英解不等式的过程如下请指出她解答过程中错误步骤的序号并写出正确的解答过程. 解去分母得31+x﹣22x+1≤1①去括号得3+3x﹣4x+1≤1② 移项得3x﹣4x≤1﹣3﹣1③合并同类项得﹣x≤﹣3④ 两边都除以﹣1得x≤3⑤
如图将边长为3a的正方形沿虚线剪成两个正方形和两个长方形.若去掉边长为2b的小正方形后再将剩余部分拼成一个矩形则矩形的周长为
HowSuperAreSupermarkets? Buyingeweek'sgroceriesistiring.Youwanttogetitoveranddonewithquicklysoyouheadforthenearestsupermarketyoufindeverythingyouneedunderoneroofandyoufeelgladthatthosedaysofgoinginandoutofdifferentshopsinthehighstreetareover.Supermarketsseemtobeabigplus.Thereisadownsidethough. IntheUK90%ofallthefoodpeopleconsumeisboughtat5differentsupermarketchains.Thismakesthesecompaniesextremelypowerfulwhichletsthemusetheirhugebuyingpowertosqueezesmallsupplierstogetthebestdeal.Milkisagoodexample.Supermarketsliketousethingslikemilkwhichisthetopofalmosteveryone'sshoppinglisttoattractcustomers.Toofferthelowestpricepossibletotheconsumerthesupermarketsforcedairyfarmerstosellmilkatlessthanthecostofproduction.Supermarketsguaranteetheirgoodprofitswhilefarmersareleftstrugglingtomakeendsmeetandthetaxpayerpaystosupportthesystemwithoutevenknowingit. Itwouldbeniceiflocalgrocerssupportedlocalagriculture.Butforthebigsupermarketsthisjustdoesn'tmakesense.Supermarketsdon'twantlittlefarmersthinkingtheycandecideprices.Sosupermarketshavestartedaglobalsearchforthecheapestpossibleagriculturalproduce.Inmanysupermarketsitisdifficulttofindanythingwhichisproducedlocally. UKfarmersusedtogrowalotofapples.Notanymore.In199936%ofappleswereimported.By2015thefigurehadrisento80%andthedomesticproductionofappleshadfallenbytwothirds.TheconsumermightjustbehappytogetareasonablypricedmealmadeupoffoodsfromThailandSpainItalyandZambiabutweshouldalsobearinmindtheInfluenceonlocalproducers. Thenthere'spackaging.Supermarketslikeeverythingtobepackedandwrappedsoitcanbepiledneatlyonshelves.Supermarketsproducenearly10milliontonsofwastepackagingintheUKeveryyearofwhichless5%isrecycled.Somesupermarketsmakesurethatlargerecyclingbinsareobviousintheircarparksshowingthattheyareenvironment﹣friendly.Butthatisjustanimage. Whenanewsupermarketisplannedthereareclaimsaboutthenumberofnewjobsthatwillbecreated.Unfortunatelythenumberofjobslostintheareaislargerthanthenumberofnewpositionsinthesupermarket.Onaverageeachnewsupermarketleadstothelossof276jobs. Howeverthemodernworldisallaboutshoppingandthefreedomtobuywhateveryouwhatsoitwouldbeimpossibletostoppeopleshoppingatsomeparticularkindofshop.Butsomemeasuresdoneedtobetakenwhensmallsuppliersloseprofitslocalproducerssuffersealevelsriseandjobsarelostanywaywecan'tjustcareaboutafreecarparkandspecialoffers. 1Theauthormentionsmilkinparagraph2toexplainhowsupermarkets. A.cheatthetaxpayers B.supportlocaldairyfarmer C.harmsmallsuppliers‘benefits D.providecustomerswiththecheapestproduct 2Accordingtothepassagesupermarketskeeppriceadvantageby. A.competingagainsteachother B.importingforeignproducts C.purchasinglocalproducts D.reducingproducttax 3Whichofthefollowingshowsthestructureofthepassage? CPCentralPointPPointSPSub﹣pointCConclusion 4Whatistheauthor'sattitudetowardssupermarkets? A.Critical B.Sympathetic C.Doubtful D.Cautious
假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. 增加在缺词处加一个漏字符号∧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处起不计分. LastSundayitwasmyfather'sfunnyday.Aftersuppermyfatherwenttoseethefilm.Butinoursurprisehecamebackjustabouthalfanhourlater.Iaskedhimwhatwasthematter.Hesmiledandtoldusaboutthefunnythingwhathadhappenedinthecinema.Hewassittinginhisseatwhileawomancametoherandsaidtheseatwashers.Surprisingtheylookedattheirticketcarefullyonlytofindtheseatsshownintheirticketswerethesamewhilethecolorsweredifferent.Sotheylookedattheticketsmorecarefully.AfterawhilemyfatherapologizedthewomansayingSorryImakeamistake.Takethisseatplease.Thefactwasthathisticketfoundoutinhisdeskdrawerwasforthefilmamonthago.
近似数5.10精确到
GetaThoroughUnderstandingofOneself Inallone'slifetimeitisoneselfthatonespendsthemosttimebeingwithordealingwith.1 Whenyouaregoingupwardsinlifeyoutendtooverestimate高估yourself.Itseemsthateverythingyouseekforiswithinyourreach.2It'slikelythatyouthinkitwiseforyourselftostayawayfromtheouterworld.Actuallytogetathoroughunderstandingofoneselfyoumayaswellkeepthefollowingtipsinmind. Gainacorrectviewofoneself.Youmaylookforwardhopefullytothefuturebutbesurenottoexpecttoomuchfordreamscanneverbefullyrealized.Youmaybecourageoustomeetchallengesbutitshouldbecleartoyouwheretodirectyourefforts.3 Self﹣appreciate.Whetheryoucompareyourselftoahighmountainorasmallstoneyourepresentastateofnature.4Ifyouearnestly诚挚地admireyourselfyou'llhavearealsenseofself﹣appreciation. 5Intimeofangerdoyourselfafavorbyreleasing释放itinaquietplacesothatyouwon'tbehurtbyitsflamesintimeofsadnessdoyourselfafavorbysharingitwithyourfriendssoastochangeabadmoodintoacheerfuloneintimeoftirednessdoyourselfafavorbygettingagoodsleep. Getafullcontrolofone'slife.Thenonewillfindone'slifefullofcolorandflavor. A.Ithasitsownvalue. B.Dooneselfafavorwhenit'sneeded. C.Doyourselfafavorwhenyouresisttheattackofillness. D.Butitispreciselyoneselfthatonehastheleastunderstandingof. E.Especiallyifitiswellwithinyourreachyouarejusttooblindtoseeit. F.Whenyouaregoingdownhillyoutendtounderestimateyourself. G.Solongasyouhaveaperfectknowledgeofyourselftherewon'tbedifficultiesyoucan'tovercome.
比较大小32.
如图1在平面直角坐标系xOy中已知点A和点B的坐标分别为A﹣20B0﹣6将Rt△AOB绕点O按顺时针方向分别旋转90°180°得到Rt△A1OCRt△EOF.抛物线C1经过点CAB抛物线C2经过点CEF. 1点C的坐标为点E的坐标为抛物线C1的解析式为.抛物线C2的解析式为 2如果点Pxy是直线BC上方抛物线C1上的一个动点. ①若∠PCA=∠ABO时求P点的坐标 ②如图2过点P作x轴的垂线交直线BC于点M交抛物线C2于点N记h=PM+NM+BM求h与x的函数关系式当﹣5≤x≤﹣2时求h的取值范围.
如图在平面直角坐标系中函数y=kx与的图象交于AB两点过A作y轴的垂线交函数的图象于点C连接BC则△ABC的面积为
下面是一道确定点P位置的尺规作图题的作图过程. 如图1直线L1与L2相交于点OAB是L2上两点点P是直线L1上的点且∠APB=30°请在图中作出符合条件的点P. 作法如图2 1以AB为边在L2上方作等边△ABC 2以C为圆心AB长为半径作⊙C交直线L1于P1P2两点.则P1P2就是所作出的符合条件的点P. 请回答该作图的依据是.
下列等式成立的是
随着高铁的建设春运期间动车组发送旅客量越来越大相关部门为了进一步了解春运期间动车组发送旅客量的变化情况针对2014年至2018年春运期间的铁路发送旅客量情况进行了调查过程如下. Ⅰ收集整理数据 请将表格补充完整 Ⅱ描述数据 为了更直观地显示动车组发送旅客量占比的变化趋势需要用填“折线图”或“扇形图”进行描述 Ⅲ分析数据做出推测 预估2019年春运期间动车组发送旅客量占比约为你的预估理由是.
假定你是中国高中生李华今年暑假期间将去澳大利亚悉尼南部Kogarah的一所综合性学校KogarahHighSchool学习一个月并将寄宿在当地的居民Silvia家中.请给Silvia写一封电子邮件询问一些将在Kogarah生活的有关情况.具体询问内容如下 1.住宿是否可以有单间2.房间里是否有网络 3.是否可以自己煮饭4.是否有便利的交通. 注意1.词数100左右 2.可适当增加细节以使行文连贯. 3.开头语和结束语已为你写好不计入总词数. DearSilvia GreetingsfromChina!IanLiHuaahighschoolstudentinChina.. Lookingforwardtoyourreply. Bestwishes. Yourssincerely LiHua.
热门题库
更多
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
高一上学期物理
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库