首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
在函数y=中,自变量x的取值范围是 .
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
函数y=中自变量x的取值范围是__
已知函数y=mx+2x-2要使函数值y随自变量x的增大而增大则m取值范围是____________.
一次函数y=kx+b的自变量的取值范围是-3≤x≤6相应函数值的取值范围是-5≤y≤-2则这个函数的
函数y=中自变量x的取值范围是
图中折线是某个函数的图象根据图象解答下列问题.1写出自变量x的取值范围____________函数值
函数y=﹣2x2+4x中自变量x的取值范围是.
函数y=中自变量x的取值范围是
在函数y=中自变量x的取值范围是_______.
若一次函数y=kx+b的自变量x的取值范围是-2≤x≤6相应函数值y的范围是-11≤y≤9则函数解析
-次函数y=ax+b的自变量x的取值范围为-2≤x≤6相应的函数值y的取值范围为-11≤y≤9则此函
函数y=中自变量x的取值范围是函数y=中自变量x的取值范围是
函数y=中自变量x的取值范围是
函数y=中自变量x的取值范围是x>3.
函数y=自变量x的取值范围是______
函数中自变量x的取值范围是________函数y=中自变量x的取值范围是____________
函数y=中自变量x的取值范围是______________
函数y=中自变量x的取值范围是.
函数y=中自变量x的取值范围是___________.
函数y=中自变量x的取值范围是__________.
函数y=中自变量x的取值范围是___________.
热门试题
更多
Themostimportantthingtokeepinmindwhendealingwithan紧急情况istostaycalm.
为提升学生的艺术素养某校计划开设四门选修课程声乐舞蹈书法摄影.要求每名学生必须选修且只能选修一门课程为保证计划的有效实施学校随机对部分学生进行了一次调查并将调査结果绘制成如下不完整的统计表和统计图. 学生选修课程统计表 根据以上信息解答下列问题 1m=b=. 2求出a的值并补全条形统计图. 3该校有1500名学生请你估计选修“声乐”课程的学生有多少名. 4七1班和七2班各有2人选修“舞蹈”课程且有舞蹈基础学校准备从这4人中随机抽取2人编排“舞蹈”在开班仪式上表演请用列表法或画树状图的方法求所抽取的2人恰好来自同一个班级的概率.
Atthemeetingtheydiscussedthreedifferent方法tothestudyofmaths.
计算 1x+2yx﹣2y+4x+y2 2+a﹣1÷
Wheneversomethinglooksinterestingorbeautifulthere'sanaturalimpulse冲动towanttoownandpreserveit﹣whichmeansinthisdayandagethatwe'relikelytoreachforourphonestotakeapicture. Thoughthiswouldseemtobeanidealsolutiontherearetwobigproblemsassociatedwithtakingpictures.Firstlywe'relikelytobesobusytakingthepicturesthatweforgettolookattheworldwhosebeautyandinterestdroveustotakeaphotographinthefirstplace.Andsecondlybecausewefeelthepicturesaresafelystoredonourphoneswenevergetaroundtolookingatthemsosurearewethatwe'llgetaroundtoitoneday. Theseproblemswerenoticedrightatthebeginningofthehistoryofphotographywhentheaveragecamerawasthesizeofagrandfatherclock.ThefirstpersontonoticethemwastheEnglishartcriticJohnRuskin.Hewasatravelerwhorealizedthatmosttouristsmakeaboringjobofnoticingorrememberingthebeautifulthingstheysee.Hearguedthathumanshaveanaturaltendencytorespondtobeautyandwishtohaveitbutthattherearebetterandworseexpressionsofthisdesire.Atworstwegetintobuyingsouvenirsortakingphotographs.ButinRuskin'seyesthere'sonethingweshoulddoandthatisattempttodrawtheinterestingthingsweseenomatterwhetherwehaveanytalentfordoingso. Ruskinwasveryupsetbyhowseldompeoplenoticedetails.HestronglydislikedthetravelerswhopridedthemselvesoncoveringEuropeinaweekbytrain.Ifhebetrulyamannoharmtogoslowforhisgloryisnotatallingoingbutinbeing. 1Peopleareeagertotakepicturesatseeingsomethingbeautifulbecause. A.it'shuman'sborndesireofowning B.it'sconvenienttodosowithamobilephone C.theyareusedtohurryingforeverything D.theycannotwaittoshareitwithfriends 2Whentakingpicturespeoplemay. A.findagoodwaytostoregoodmemoriesintheirminds B.feelithardtolearntheskillsoftakinggoodphotos C.ignoreappreciatingsomethingattractiveonthespot D.havechancestomeetthechallengeofnewtechnology 3Accordingtothelastparagraphtravellingpeopleareusuallyproudof. A.thelongdistancethattheyhavecovered B.thehappyhoursthattheyhavegonethrough C.theadvancedtransporttoolthattheyhavetaken D.thegreatconveniencethattheyhavebeenoffered 4WecanconcludethatRustinattachedimportanceto. A.travellingaroundtheworld B.takingbeautifulphotoswithacamera C.takingphotosinsteadofpaintingpictures D.admiringtheworld'sbeautyattentively
如图抛物线y=ax2+bx﹣3与x轴交于A﹣10B30两点与y轴交于点C点D是抛物线的顶点. 1求抛物线的解析式. 2点N是y轴负半轴上的一点且ON=点Q在对称轴右侧的抛物线上运动连接QOQO与抛物线的对称轴交于点M连接MN当MN平分∠OMD时求点Q的坐标. 3直线BC交对称轴于点EP是坐标平面内一点请直接写出△PCE与△ACD全等时点P的坐标.
假如你是李华请按如下提示给酷爱中国书法的外教Mr.Smith写一封信邀请对方参加你校举办的书法展calligraphyexhibition. 1.展出时间2019年10月8日﹣12日 2.展出地点学生活动中心5楼 3.展出作品300多幅师生作品 注意1.词数100左右 2.可以适当增加细节以使行文连贯.
如图在△ABC中∠ACB=90°CA=CB点O在△ABC的内部⊙O经过BC两点交AB于点D连接CO并延长交AB于点G以GDGC为邻边作▱GDEC. 1判断DE与⊙O的位置关系并说明理由. 2若点B是的中点⊙O的半径为2求的长.
TwoofthesaddestwordsintheEnglishlanguageareifonly.Ilivemylifewiththegoalofneverhavingtosaythosewordsbecausetheyconveyregretlostopportunitiesmistakesanddisappointment. MyfatherisfamousinourfamilyforsayingTaketheextraminutetodoitright.Ialwaystrytolivebytheextraminuterule.WhenmychildrenwereyoungandlikelytocauseaccidentsIalwaysthoughtaboutwhatIcoulddotoavoidanifonlymomentwhetheritwassomethingminorlikemovingacupfullofhotcoffeeawayfromtheedgeofacounterorsomethingthatrequiredalittlemoreworksuchastapingpadding衬垫ontothesharpcornersofaglasscoffeetable. Idon'tonlyavoidthoseifonlymomentswhenitcomestosafety.It'sequallyimportanttoavoidifonlyinourpersonalrelationships.WeallknowpeoplewholostalovedoneandregrettedthattheyhadlostanopportunitytosayIloveyouorIforgiveyou.WhenmyfatherannouncedhewasgoingtotheeyedoctoracrossfrommyofficeonGoodFridayItoldhimthatitwasaholidayformycompanyandIwouldn'tbethere.ButthenIthoughtaboutthefactthathe's84yearsoldandIrealizedthatIshouldn'tgiveupanopportunitytoseehim.IcalledhimandtoldhimIhaddecidedtogotoworkonmydayoffafterall. IknowtherewillstillbeoccasionswhenIhavetosayifonlyaboutsomethingbutmylifeisdefinitelybetterbecauseofmypolicyofdoingeverythingpossibletoavoidthateventuality不测的事.AndeventhoughittakesanextraminutetodosomethingrightoritoccasionallytakesanhourortwoinmybusyscheduletomakeapersonalconnectionIknowthatI'mdoingtherightthing.I'mbuyingmyselfpeaceofmindandthat'sthebestkindofinsuranceformyemotionalwell﹣being. 1Whichofthefollowingisanexampleoftheextraminuterule? A.Startthecarthemomenteveryoneisseated. B.Leavetheroomforaminutewiththeironworking. C.Waitforanextraminutesothatthesteaktastesbetter. D.Moveanobjectoutofthewaybeforeitletssomeonefalldown. 2WhydidtheauthordecidetogotoherofficeonGoodFriday? A.Tokeepherappointmentwiththeeyedoctor. B.Tomeetherfatherwhowasalreadyanoldman. C.Tojoinintheholidaycelebrationofthecompany. D.Tofinishherworkbeforethedeadline. 3Whatcanweinferfromthepassage? A.Itisthemostimportantthingtoavoidifonlyinourdailylife. B.Theauthormusthaveagoodrelationshipwithherchildren. C.Weshouldbuyinsurancetomakeourlifebetter. D.Avoidingifonlycanmaketheauthorcomfortable. 4Whatisthebesttitleforthepassage? A.TheEmotionalWell﹣being. B.TheTwoSaddestWords. C.TheMostUsefulRule. D.ThePeaceofMind.
Whileastronautsinspacegettodomanyexcitingthingstheymissoutonordinarythingsthatwealltakeforgranted﹣beingabletowalkonfirmgroundhangingoutwithfamilyanddiggingintoasliceofhotsteamingpizza.Thoughnotmuchcanbedoneaboutthefirsttwothingstheremaysoonbeasolutiontothethirdonethankstothiscool3﹣Dpizzaprinter! AboutayearagoNASAoffered﹩125000toAnjanContractora3﹣Dtechnologyexperttobuildadevicethatwouldallowastronautstomakepizzaondemand.Themechanicalengineerpromisedthathisinventionwouldproducepiesinlargequantitiesthatlookedtastedandevensmelledlikepizzamadeincommonovens. Latelastyeartheengineerpresentedavideoofhisfirstprototype原型thatbeginsbycreatingasinglesliceofdough面团thatiscookedandprintedatthesametime.Thencomesthetomatosauce﹣amixoftomatopowderoilandwaterandfinallyaproteinslicethatresemblescheese.Whilethevideodoesn'tshowthebakingprocesstheinventorsaysthatoncethepizzaisprinteditcanbereadytobeconsumed消耗in7seconds. WhilethepieinthevideolooksdeliciousenoughtoattractanypizzaloverAnjanContractorisfarfromreadyforastronauts.That'sbecausehestillhastofindasolutiontomakethefoodcontainerintheprinterlastfor30years.Thoughthatmaysoundunrealisticactuallyitisnot.AnjanContractorbelievesthattheonlywaythatispossibleisthatthewaterisremovedfromalltheingredientsandthentheyarereducedtothepowderform.Thisasyoucanimaginewillnotbesoeasy.Butwhiletheprintermaynotbereadyforspaceitcertainlylooksreadyenoughforpeopleonearth.HopefullyNASAandContractorwillconsidersellingittothosenotfortunateenoughtogotoMars! 1Whydoestheauthormentionthethingsthatastronautsinspacecannotdo? A.Toaskusnottotakecommonthingsforgranted. B.Toshowtheyliveadifficultlifethere. C.Toshowtheirlifeisboringinspace. D.Tointroducethetopicofthetext. 2NASAoffered﹩125000toAnjanContractormainlyto. A.createsomenewtypeof3﹣Dprinter B.attractmorecompaniestoworkforNASA C.helpastronautsinspaceenjoyfreshpizzaoneday D.producepizzainlargequantitiestoearngreatprofits 3ThebiggestchallengethatAnjanContractorisfacedwithnowisprobablythat. A.hehasnomoneylefttogoonwithhisresearch B.thepizzadoesn'tseemappetizingtopizzalovers C.hehasnowaytomakepizzathatcanlastforthirtyyears D.hecannotmakethefoodcontainerlastfordecades 4What'sthebesttitleofthepassage? A.NASAistryingitsbesttohelpastronautseatbetter B.Astronautsmaysoonbeabletoenjoysteaminghotpizza C.NASAisworkingonmakingpizzaforcommonpeople D.A3﹣Dpizzaprinterhasbeenusedtomakepizza
2019年4月10日全球六地同步发布“事件视界望远镜”获取的首张“黑洞”煕片这个位于室女座足系团中的黑洞质量约为太阳的6500000000倍.将6500000000用科学记数法表示为.
Themoonhadgonebehindacloudandthereweren'tmanystarsinthesky.AsItookaglance一瞥atmyneighbor'shouseIsawaflame火焰inhis1.IthoughthewashavingamidnightfastfoodsoIwentbacktomy2. Soontherewasa3smellintheairandIguessedsomethingwaswrong.4Ijumpedoutofbedandwentdownstairsto5.Isawfirecomingoutofmyneighbour'skitchen.RightawayI6Fire!Fire!Buttherewasnoonenearbyto7myshoutsforhelp. I8intomyhousecalledtheFireDepartmentandwentbacktomyneighbour'shouse.Irangthedoorbellhitonthedoorand9myneighbour'snamebuttherewasno10.Imanagedto11thehouseandrescuedacatandarabbit. Itriedtothrowwaterthroughthekitchenwindow12itwasnousethefirewastoostrong.13afireenginearrivedandsoonthefiremenputoutthefire.Theyarrivedjust14asthefirewasgoingto15totheotherroomsinthehouse. Whenmyneighbourcamebackhewas16becausehiskitchenwasburntdownbuthethankedmeforcallingtheFireDepartmentandforsavinghis17.HewantedtogivemesomemoneyinreturnbutIdidnot18it. Weekslatermyneighbourrepairedandrestoredhiskitchen.He19metoseehisnewkitchenandtherehegavemeamedal奖章thathehad20orderedfromafactory.Itmademefeelveryhappy. 1A.sittingroom B.bathroom C.kitchen D.bedroom 2A.chair B.table C.bed D.sofa 3A.big B.hot C.special D.burning 4A.Afterawhile B.Allthetime C.Onceinawhile D.Atonce 5A.examine B.search C.listen D.smell 6A.said B.shouted C.received D.smiled 7A.hear B.listento C.ask D.turnto 8A.walked B.rushed C.jumped D.stepped 9A.calledin B.calledup C.calledout D.calledfor 10A.answer B.light C.sound D.fire 11A.takeout B.takeup C.breakdown D.breakinto 12A.and B.but C.because D.so 13A.Luckily B.Sadly C.Unfortunately D.Suddenly 14A.intime B.ontime C.atatime D.attimes 15A.run B.spread C.flow D.return 16A.glad B.sad C.sick D.angry 17A.children B.parents C.life D.pets 18A.expect B.want C.accept D.get 19A.ordered B.begged C.advised D.invited 20A.mainly B.particularly C.specially D.naturally
1don'tfeel精力充沛的enoughtorushaboutsoIllsitdown.
下列图形是由同样大小的三角形按一定规排列面成的.其中第①个图形有3个三角形第②个图形有6个三角形第③个图形有11个三角形第④个图形有18个三角形……按此规律则第⑦个图形中三角形的个数为
IdeastoMakeYourSchoolaGreenCampus Universitiesaredoingeverythingtheycantobecomeagreencampus.Buttherearealsoitemsstudentscandotomakeyourcampusmoreeco﹣friendly. Recycleeverythingespeciallypaper! Thereisalargeamountofpaperacollegestudentgoesthroughpersemester.1Weknowthatthesethingscan'tbeavoidedbutthewayyouhandletheuseofallthepapercanreallyhelpcreateabettergreencampus. Buygreen. 2Papercleaningproductsandwaterareproductsthatcanbepurchased购买asrecycledgoods.They'reslightlymoreexpensivethanthenormalproductsbutit'sworthittomakeagreencampus. Walkandbiketoschool. Mostcampusesespeciallythosethataretryingtobecomeamoreeco﹣friendlycampushaveprettygoodpublictransit.3Walkingorbikingwillhelpmakeyourcampusagreenuniversity. 4 Awaterbottlecanberefilledatanywaterfountainandcaneasilybedrankinclassorwhileridingabike.Thiswillsavetheenvironmentbydecreasingtheamountofplasticwasteonyourcampus. Buyusedclothing. Itisusuallythoughtofassomethingtodotosavemoney.5Recyclingclothesminimizetheuseofresourcestomakeclothingandputsadentintheproblemofworldwidesweatshops. A.Carryawaterbottle. B.Itisalsogoodfortheenvironment! C.Buyrecycledgoodsasmuchaspossible. D.Papermadeofthiskindwoodismuchstronger. E.Ontopofthatalmostalluniversitiesarepedestrian行人friendly. F.Itincludesclassnotestermpapersstudentnewspapersandsoon. G.Universitiescallonallthestudentstolearntorecycleallthewastepaper.
The10thannualInternationalGoSkateboardingDaywillbeheldonJune212012.SkateboardingDayisallaboutfun!Hereisyourguidetosomeoftheeventsaroundtheworld. LosAngelesCalifornia Over10000skateboardersfromaroundtheworldwillgatherinthestreetsofL.A.TheyhavepartneredwithBoardsforBrosanonprofitorganizationthatcollectsandrestores修复skateboardsforchildrenwhocannotaffordtheirownandhaveaskedskateboardersacrosstheUStodonatetheirusedskateboardproducts.Thecelebrationwilllastmostofthedaytime. ManilaPhilippines TheSkateboardingDaytobeheldinthePhilippineswillbeintheManilaforthesecondtime.Manilaishopingtopromotehealthandskateboardingsports.Theeventbeginsat200pmandendsat600pm.TheskateboardersstartfromLiwasangBonifaciowheretheycanskateinthestreetsofP.BurgosRoxasBoulevardanduptoMalatefountaininRajahSolimanParkwheretheeventendswithaProductTossandBestTrickcontest. SylvanLakeAlbertaCanada IfyouhappentobeinAlbertaCanadaandtheweatherisn'tgreatforoutdoorskatingInclineSkate&BMXParkistheplacetogoskateboarding.Inclineisagreatplacetoskateandadaypassthereisonly﹩8foranadulthalfforthosebelow16.OnGoSkateboardingDaytheywillholdacompetitionwiththefirstprizewinnertakinghome﹩600. NewYorkCityNewYork SteveRodriguezownerandfounderofSBoroSkateboardsholdsthebiggestchapteroftheSkateboardingDayintheworld.TensofthousandsofpeoplewillparticipateandJune21stisnowanofficialNewYorkCityholiday.Theeventstartsat10amandendsat6pm.Therewillbeafreeclinicat10amtonsofprizesfoodanddrinks.Fordetailsofthefulldaypleasecheckouthttp://www.Sboro.com. 1ItcanbelearnedthattheBoardsforBrosaimsto. A.provideskateboardsforpoorchildren B.collectusedskateboardproductstothefestival C.searchforcompetitorsforthefestivaleveryyear D.restoreskateboardsonlyforthecompetitors 2Howmuchwilltheypayifacouplewiththeir14﹣year﹣oldchildskateinIncline? A.Eightdollars. B.Twelvedollars. C.Sixteendollars. D.Twentydollars. 3Wherewilltheeventorcelebrationlasttheshortest? A.InManilaPhilippines. B.InLosAngelesCalifornia. C.InSylvanLakeAlbertaCanada. D.InNewYorkCityNewYork.
将一个三角形放大为与它相似的三角形如果周长扩大为原来的3倍那么面积扩大为原来的
IlostmysightwhenIwasfouryearsoldbyfallingoffacarandhurtingmyhead.NowIamthirtytwo.Icanvaguelyrememberthebrightnessof1andwhatcolourredis.Itwouldbe2toseeagainbutan3candostrangethingstopeople.Idon'tmeanIwould4togowithoutmyeyes.IsimplymeanthatthelossofthemmademeappreciatemorewhatIhad5. Myparentsandmyteacherssawsomethinginme﹣a6tolive﹣whichIdidn'tseeandtheymademewanttostiritupwith7. The8lessonIhadtolearnwastobelieveinmyself.Iamnottalkingaboutsimplythekindof9thathelpsmedownanunfamiliarstaircasealone.I10somethingbiggerthanthataconfidencethatIamdespitebeing11arealpositivepersonthatthereisaspecialplacewhereIcanmakemyselffit. Ittookmeyearstodiscoverandstrengthenthisconfidence.Ithadtostartwiththeeasyandsimplethings.12amangavemeanindoorbaseball.IthoughthewaslaughingatmeandIwas13.Ican'tusethisIsaid.Takewithyouheurgedmeandrollitaround.Thewords14inmymind.Rollitaround!ByrollingtheballIcould15whereitwent.ThisgavemeanideahowtoachieveagoalIhadthought16beforeplayingbaseball.AtPhiladelphia'sOverbrookSchoolfortheblindI17asuccessfulvariationofbaseball.Wecalleditgroundball. Ihavesetaheadofmeaseriesofgoalsandthentriedtoreachthemoneatatime.Ihadtobeclearaboutmy18.ItwasnogoodtryingforsomethingthatIknewatthestartwas19outofreachbecausethatonlybroughtbitternessoffailure.Iwouldfailanyway20ontheaverageImadeprogress. 1A.sky B.cloud C.sunshine D.mist 2A.helpful B.wonderful C.hopeful D.successful 3A.disaster B.environment C.incident D.wonder 4A.manage B.try C.want D.prefer 5A.lost B.left C.used D.cared 6A.purpose B.potential C.pressure D.preparation 7A.energy B.happiness C.luck D.blindness 8A.hardest B.dullest C.simplest D.easiest 9A.self﹣respect B.self﹣control C.self﹣confidence D.self﹣defence 10A.think B.consider C.guess D.mean 11A.imperfect B.perfect C.unfair D.fair 12A.Later B.Soon C.Once D.Then 13A.worried B.encouraged C.shocked D.hurt 14A.stuck B.impressed C.occupied D.held 15A.see B.hear C.notice D.observe 16A.important B.unimportant C.possible D.impossible 17A.invented B.discovered C.instructed D.directed 18A.experience B.advantages C.knowledge D.limitations 19A.hardly B.wildly C.highly D.deeply 20A.so B.for C.but D.and
MaryAnningwasanEnglishfossil化石collectordealerandpaleontologist古生物学家.Herfossil﹣huntinghelpedchangethewaypeoplethoughtabouttheworld. MarywasbornintoapoorfamilyinEnglandonMay211799.ShelivedintheseasidetownofLymeRegisinDorset.Thefamilyhadninechildren.OnlyMaryandherbrotherJosephgrewup.Mary'sfathertookhischildrenalongthebeach.Theypickedupshellsandstonestoselltovisitors.Marydidnotgotoschoolmuch.Herfamilywastoopoor.Andschoolsdidnotteachchildrenaboutfossils.Marycouldreadandwrite.Shetaughtherself.Shelearnedaboutrocksandhowbodiesaremade. In1811whenMaryandJosephwerefossilhuntingJosephsawabonestickingoutoftherock.Maryhadahammertochipawayattherock.Verycarefullysheuncoveredit.Shefoundthefirstcompletefossiloftheichthyosaur鱼龙. SincethenMarybecamecrazyaboutfossilhunting.Shelikedtohuntonthebeachafterastorm.Thewindrainandwavesmadetherockscrumble.Itwaseasytospotfossils.MostdaysMarywentfossilhuntingwithherdogTray. RichfriendshelpedMarybysellingfossilsforher.Theysenthermoney.Scientistswrotelettersandcametoseeher.OnegoodfriendwasWilliamBucklandaprofessoratOxfordUniversity.Maryalsoopenedashoptosellfossilsstonesandshells.Shechattedwithvisitors. MaryAnningdiedin1847.Howevolution进化workswasexplainedbyCharlesDarwinnotlongafterMarydied.Herfossilshadhelpedscientistsunderstandhowthingsbegan. 1WhydidMary'sfathertakehischildrenalongthebeach? A.Toenjoylife. B.Tomakealiving. C.Tolookforfossils. D.Toteachthemaboutfossils. 2WhatcanwelearnaboutMary? A.Herfatherwasapaleontologist. B.Herfathereducatedherathome. C.Shehadninebrothersandsistersinall. D.Shemightbepopularatthattime. 3Whowasthefirstonetocatchsightoftherockcontainingthefirstcompleteichthyosaurfossil? A.CharlesDarwin. B.Mary'sdog. C.Joseph. D.Mary. 4Whatdoestheunderlinedwordcrumbleinthefourthparagraphmeans? A.break B.shake C.float D.dive
如图菱形ABCD中∠ABC=135°DH⊥AB于H交对角线AC于E过E作EF⊥AD于F.若△DEF的周长为2则菱形ABCD的面积为
MarkTwainwasa幽默的writerandhiworksalwaysmakereaderslaugh.
古彝文是世界六大仍在使用的古文字之一下列意为“古风歌”的四个古彝文中是轴对称图形的是
如图等腰△OAB的底边OB恰好在x轴上反比例函数y=的图象经过AB的中点M若等腰△OAB的面积为24则k=
Lastweekinanunusualwayastrangertreatedmewithgenerosity.AtanAsiangrocerystoreonabusyeveningIwasshoppingfortheitemsIneeded1myvoluntaryworkofcookingbreakfastonSaturdayatashelterforthehomelessinSanJose.Iwenttothestore2buytofuandvegetables.AsI3waitinlinetofinishthepurchasetheladynexttomeapproachedmetofindout4IwasgoingtoconsumethebigboxoftofuIwasbuying.EnthusiasticallyIrepliedthatIwasbuyingfoodtocookbreakfastforhomelesspeople. WhileIwasgettingreadytopaythebilltomy5amazesheofferedtopayforeverything.Despitemultiplerequestsfor6namesherespondedthatshefeltgoodbecauseIwasdoingthekindofcommunityworkwhichherparentsoncereceivedhelpfrom7theycametothiscountryasrefugees.Henceshewantedtotake8opportunitytoshowhergratitude. Itwasthe9goodrewardIhadeverreceivedformyvoluntarywork10beganthreeyearsago.Inastrangewayweareallconnectedandwefeelgratefulforeachother.
某网店销售一种儿童玩具进价为每件30元物价部门规定每件儿童玩具的销售利润不高于进价的60%.在销售过程中发现这种儿童玩具每天的销售量y件与销售单价x元满足一次函数关系.当销售单价为35元时每天的销售量为350件当销售单价为40元时每天的销售量为300件. 1求y与x之间的函数关系式. 2当销售单价为多少时该网店销售这种儿童玩具每天获得的利润最大最大利润是多少
Fouryearsagoweaskedourselveswhatifwecouldcreateashoppingexperiencewithnowaitinginlinesandnocheckout?Orcouldwecreateaphysicalstorewherecustomerscouldsimplytakewhattheywantandgo?OuranswertothosequestionsisAmazonGowhereyoucouldexperiencetheideaofjustwalkoutshopping. AmazonGoisanewkindofstorewithnocheckoutrequired.Wecreatedtheworld′smostadvancedshoppingtechnologysoyouneverhavetowaitinline.WithourjustwalkoutshoppingexperiencesimplyusetheAmazonGoapptoenterthestoretaketheproductsyouwantandgo!Nolinesnocheckout. Ourcheckout﹣freeshoppingexperienceismadepossiblebythesametypesoftechnologiesusedinself﹣drivingcarscomputervisionsensorfusionanddeeplearning.Ourjustwalkouttechnologyautomaticallydetectswhenproductsaretakenfromorreturnedtotheshelvesandkeepstrackoftheminyourvirtualcart.Whenyou9redoneshoppingyoucanjustleavethestore.Shortlyafterwe′llchargeyourAmazonaccountandsendyouareceipt. Weofferdeliciousready﹣to﹣eatbreakfastlunchdinnerandsnackoptionsmadefresheverydaybyouron﹣sitechefsandfavoritelocalkitchensandbakeries.Ourselectionoffoodstuffrangesfrombreadandmilktocheesesandlocallymadechocolates.Yoifllfindwell﹣knownbrandsweloveplusspecialfindswe′reexcitedtointroducetocustomers.Foraquickhome﹣cookeddinnerpickuponeofourchef﹣designedAmazonMealKitsandyoucanmakeamealfortwoinabout30minutes. Our1800﹣square﹣footshoppingspaceisconvenientlycompact紧凑的sobusycustomerscangetinandoutfast.Itislocatedat21317thAveSeattleWAonthecornerof7thAvenueandBlanchardStreet.AllyouneedisanAmazonaccountasupportedsmartphoneandthefreeAmazonGoapp. AmazonGoiscurrentlyonlyopentoAmazonemployeesinourtestingprogramandwillbeopentothepublicsoon. 1FromthepassagewecanlearnthatAmazonGo. A.isacheckout﹣freestore B.sellsallkindsofgoods C.isopentothepublic D.usesunknowntechnologies 2WhatismainlydiscussedinParagraph3? A.WhenAmazonGocharges. B.HowAmazonGoworks. C.WhereAmazonGolies. D.WhatAmazonGosells. 3CustomerspayfortheproductsfromAmazonGoby. A.payingcashatthecounter B.walkingoutofthestore C.usingtheirAmazonaccounts D.scanningsmartphoneswhenleaving 4Themainpurposeofthepassageisto. A.encouragepeopletoshoponline B.advisepeopletoworkforAmazon C.informpeopleofanewconceptstore D.tellpeopleoftheshoppingexperience
Itwas难以置信的thatsuchanhonestfellowshouldhavebetrayedhisfriends.
如图矩形ABCD中AB=2AD以A为圆心AB长为半径作弧BECD于E若AB=4则阴影部分的面积为结果保留π和根号.
AB两地之间有一C地某日早上9点一辆电力巡查车作例行巡查查线路是从A地到C地再原路返回A地全程匀速行驶调头时间忽略不计.家住C地的陈先生同样是在当天的早上9点出发驱车前往B地取一份文件然后返回经C地前往公司所在地A地.陈先生余程也是匀速行驶取文件花费了4分钟设两车之间的距离为ym出发后的行驶时间为xminy与x的关系如图所示.那么当电力巡查车到达C地时陈先生距A地还有m.
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.错误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. DisappointingattheresultoftheexaminationIsatonthesofainsilentafterschool.MyfatherhefoundIwassounhappycometoaskmewhy.Afterlearningthereasonmyfathergavemeasmile.HesaidDon'tallowtheterriblythingsinyourlifetodiscountthepositiveones.Don'tletabaddayormonthoryeartomakeyoufeellikeyouhaveabadlifeinsteadfocusingoneverythingthat'sgoingwrongstartholdingontoallofthethingsthatisgoingright.You'llfeelbettersoon.HeardwhatmyfathersaidIfeltittheshametoactlikethatanddecidedtocheermyselfup.
热门题库
更多
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
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
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