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关于函数f（x）＝sin|x|+|sinx|有下述四个结论： ①f（x）是偶函数 ②f（x）在区间（，π）单调递增 ③f（x）在[﹣π，π]有4个零点 ④f（x）的最大值为2 其中所有正确...
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高一下学期数学《》真题及答案
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关于函数fx=sin|x|+|sinx|有下述四个结论 ①fx是偶函数 ②fx在区间π单调递增
①②④
②④
①④
①③
已知函数fx是定义在R上的偶函数当x≥0时fx=x2﹣2x﹣1.1求fx的函数解析式2作出函数fx的
下面四个结论①偶函数的图象一定与y轴相交②奇函数的图象一定经过原点③偶函数的图象关于y轴对称④既是奇
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.关于函数fx=2sinx-cosxcosx的下列四个结论:①函数fx的最大值为;②把函数fx=si
已知x∈R符号表示不超过x的最大整数若函数fx=x＞0则给出以下四个结论正确的是
函数f(x)的值域为
函数f(x)的图象是一条曲线
函数f(x)是(0,+∞)上的减函数
函数g(x)=f(x)﹣a有且仅有3个零点时
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若fx是定义在R.上的奇函数且满足fx-2=-fx.给出下列四个结论①f2=0②fx是以4位周期的周
对于函数fx=x|x|+px+q现给出四个命题①q=0时fx为奇函数②y=fx的图象关于0q对称③p
函数fx的定义域为R.导函数f′x的图象如图所示则函数fx
无极大值点，有四个极小值点
有三个极大值点，两个极小值点
有两个极大值点，两个极小值点
有四个极大值点，无极小值点
若函数y=fx在实数集R.上的图象是连续不断的且对任意实数x存在常数t使得fx+t=tfx恒成立则称
已知函数fx为偶函数其图象与x轴有四个不同的交点则这四个不同交点的横坐标之和为________.
符号[x]表示不超过x的最大整数如[π]=3[﹣1.08]=﹣2定义函数{x}=x﹣[x]．给出下
下列四个结论中1任取x>0均有3>22若函数fx-1的定义域为13则函数fx的定义域为243若函数f
函数fx的定义域为R.导函数f′x的图象如图所示则函数fx
无极大值点，有四个极小值点
有三个极大值点，两个极小值点
有两个极大值点，两个极小值点
有四个极大值点，无极小值点
已知x∈R符号[x]表示不超过x的最大整数若函数fx=x＞0则给出以下四个结论①函数fx的值域为[0
设函数给出下列四个命题:①当c=0时y=fx是奇函数;②当b=0c>0时方程fx=0只有一个实根③函
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3个
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设函数fx＝|x|x＋bx＋c则下列命题中正确命题的序号有________.①函数fx在R.上有最小
关于函数有如下四个结论①函数fx为定义域内的单调函数②当ab＞0时是函数fx的一个单调区间③当ab＞
关于函数fx＝2sinx－cosxcosx的四个结论P.1最大值为P.2把函数fx＝sin2x－1的
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下面四个结论中正确命题的个数是①偶函数的图像一定与y轴相交②函数fx为奇函数的充要条件是f0＝0③偶
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已知函数fx＝cos－cos2x其中x∈R.给出下列四个结论①函数fx是最小正周期为π的奇函数②函数
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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
LastweekendIwentsnowshoeingwithagroupofteachersfrommyschool.1itfeltalittlestrange﹣﹣﹣abitlikewearingflippers脚蹼2youswim!lfeltquiteclumsytostartwithanditwas3toclimboverthefallentreeswiththesnowshoes4tomyfeet.HoweverIlove5andamusedtowalkinginmountainousareas6Isoongotusedtoit.Ilovedwalkingthroughtheforestandseeingallthetreescoveredin7!Attimeswalkinguphillinthesnowwashard8whentherewererocksunderneaththesnow.Oncewereachedthe9itwasworthit!Themountainwe10wascalledLeTanetanditwasl292mhigh﹣﹣﹣that'shigherthanSnowdonthetallestmountaininWales!Theskywasabitgraybuttheviewswere11.Imanagedtogetsomegreat12﹣﹣﹣andrememberedtousemynewcamera!Aftertakinglotsofphotoswestartedgoingdown.Insomewaysgoingdownthemountainwasharderthan13.Itwasverysteep陡峭anditwaseasyto14inthesnow. Atthebottomwehadahotdrinkinacabin﹣﹣﹣itwasclearly15afterafewhoursofwalkinginthecold!Beforewewent16Iattemptedsledging雪橇whichI'dnever172before!Itwasgreatfun! TobehonestI'dreally18snowshoesasanalternativetothemorewell﹣known19sports.Besidesbeingalotcheaperthanskiingit'seasiertodoandisconsideredtobealot20! 1A.Atfirst B.Byday C.Aboveall D.Bychance 2A.unless B.when C.since D.before 3A.practical B.easy C.difficult D.enjoyable 4A.designed B.reviewed C.adjusted D.attached 5A.swimming B.skiing C.hiking D.riding 6A.and B.but C.if D.so 7A.mud B.fog C.dirt D.snow 8A.especially B.normally C.directly D.perfectly 9A.bottom B.top C.valley D.beach 10A.promoted B.climbed C.protected D.ignored 11A.excellent B.common C.similar D.universal 12A.assistance B.guides C.photos D.equipment 13A.lying B.checking C.stayingup D.goingup 14A.spread B.test C.slip D.sleep 15A.needed B.displayed C.controlled D.backwards 16A.upstairs B.home C.abroad D.changed 17A.gotten B.seen C.lost D.tried 18A.suspect B.dislike C.recommend D.quit 19A.extreme B.winter C.water D.track 20A.cheaper B.safer C.firmer D.slower
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.
假定你是李华最近你要为你们学校的英文报写一篇关于中欧友好日暨中欧环保小使者活动走进欧盟学校的新闻报道. 内容要点 1.中国学生表演了武术书法气功等中国特色项目 2.欧洲学生上演了有关环保的戏剧节目 3.活动的意义. 注意 1.词数100左右开头已写好不计入总词数 2.可以适当添加细节以使行文连贯.参考词汇武术martialarts气功Qigong OntheChina﹣EuropeFriendshipDaymanyChinesestudentsandtheirEuropeanfriendsgottogetherataEU'smiddleschool..
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Writeagoodinterestingblog Ifyouwanttoavoidbeingfrustratedforwritingablogthatwasneverreadherearesomewaystomakeagoodinterestingblog. 1CBoringtopicsaregenerallynotgoodforblogsunlessyouaregeniuswriterswhocancreatebeautifulprose散文evenwhenwritingaboutthemostordinarythings. Pickatopicyouknowandarepassionateabout.2EIfyoulikevideogamesforexamplewriteonedetailingyourexperiencesofplayingthem.NotethatthiskindofblogisdifferentfromaDearDiaryblog. Avoidwritingyourownbiography.ADearDiaryblogisn'tinterestingtootherpeopleunlessyouareareallysignificantperson.Thinkaboutitwhowouldreallywanttoknowwhatyouatefordinner?Thiskindofblogisself﹣indulgent放纵自己的andunnecessary.3A Funnyblogpoststendtobecomevital.Humorouschartspicturesandvideosaregreatsupplementstoyourtext.4GTrytothinkofuniquethingstowriteaboutorwriteanopposingviewonacertainsubject. 5DPeoplehatebeingled﹣onandtrickedintoreadingablogpostthattheyexpecttobehelpfuljusttorealizethatitisasubjectiveandpromotionalone. A.Itdoesnotofferanythingtothepeoplereadingit. B.Writeyourblogaboutyourpersonalthings. C.Chooseaninterestingtopic. D.Informyourreadersfromthebeginning. E.Itshouldbeonethatotherpeoplecanrelateto. F.Writeyourblogclearly. G.Donotrehashorrewriteblogpostsfromfamousblogs.
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
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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．
已知则A＝
Theselfieisusedtodescribetheself﹣takenphotooftenfromasmartphone.Someonetakesabout10selfieseachtimehedoesandheonlyendsup1postingpostoneortwoofthose.Hepickstheonethathefeelsmakehimlookthe2bestgood.Inthatpicturehegainsconfidence.Forthatmomenteverythingbadorterriblethathashappenedtohim3isremovedremovebecausethatsmileiswhatgiveshimthe4determinationdeterminetolovehimself. Iread5apoemrecentlyandtheyoungmansaidIfIaskyou6whatyoulovetheanswerswillmostlikelyrolloffyourtongue.Youlovetoread.Youlovetowrite.Youloveyourmomyoudaughteroryourbestfriend.Howlongdoyouthinkyoucangoonandonbeforeyousay‘Ilove7myselfI'? Thatstatementhitmelikeatonofbricks.I'vestruggledwithconfidenceallmylife.Istilldo.Andin8nowayamIsayingthattakingaselfieisagateway9toconfidence.10However/Rather/Insteadtheselfiedoesdeservesomecreditforallowingindividualstoexpressthemselves.
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．
IfaskedifspaceexplorationshouldcontinuemostAmericanswouldgiveanimmediateresponseeitherinfavorofcontinuingorinfavorofendingspaceexploration.Acommonresponsewouldbethatspaceexplorationisawasteofmoney.AnaverageAmericanuneducatedonthesubjectmightbelievethatthegovernmentiswastingbillionsofdollarsontheresearchthathasnovalue.Someonestrangetothesubjectmightsaythataspaceshuttlegoesuponceinawhileandthatisaboutallthathappens.Researchisongoingandcontinueswhentherearenoshuttlesbeinglaunched.Thisalsocoststhegovernmentmoney.Doestheextremecostofspaceexplorationmakesense? OneargumentisthatthegovernmentiswastingmoneyontheresearchnotbeingusedonEarth.ActuallythemoneygoestoworkersandscientiststhatsupportNationalAeronauticsandSpaceAdministrationNASNmissionsandgoestomajorcompaniesthatplayimportantrolesinmajorsectorsoftheUSeconomy.BoeingisapartnerofNASAforaircraftthesamecompanythatmakescommercialaircraftfortheairlineindustry. Anotherbenefittocontinuingspaceexplorationisthemanytechnologiesitprovides.Theartificial人造的heartresultedfromexperimentsonthespaceshuttle.ThehandheldJawsofLifeusedtosavevictimsfromcaraccidentsresultedfromthesystemusedtoseparatethespaceshuttlefromitsboosterrockets.Insulation隔热板inhomesthatkeepsthemwarmandenergyefficientisbasedonthetechnologyusedtoinsulatethespaceshuttle. TherearedirectbenefitstotheeconomyprovidedbyNASAmissionsaswellasthosetechnologies.Theseadvancesarefoundinfoodbuildingmaterialsmedicalproceduresandthevehicleswedrive.Whileitcanbeproventhatbillionsofdollarsthatcouldbeusedelsewhereisbeingspentonspaceexplorationthebenefitsitprovidesoutweightheterribleaspects.Asamatteroffactthemoneyspenthelpstoimprovethequalityofourlives. 1HowisParagraph2mainlydeveloped? A.Byofferinganalyses. B.Bymakingcomparisons. C.Bygivingsomeexamples. D.Bypresentingresearchfindings. 2ThefunctionofJawsofLifeisto. A.savepeoplefromtrafficaccidents. B.doexperimentsonthespaceshuttle C.keephouseswarmandenergyefficient D.separatethespaceshuttlefromitsboosterrockets. 3Intheauthor'sopinionspaceexploration. A.haschangedourlifecompletely B.coststoomuchofourtime C.benefitsusinmanyways D.hasnothingtodowithus 4Whatwouldbethebesttitleforthetext? A.Benefitsofspaceexploration B.Isspaceexplorationworththecost? C.Howtomakespaceexplorationaffordable D.MissionsoftheNASAspaceshuttleprogram
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．
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
下列等式成立的是
GeneticallyModifiedGMfoodisunfortunatelybecomingmorepopularamongstfarmersandfoodprocessors.Cropsarebeinggeneticallymodifiedtoresistinsectsplantdiseasesinsecticides杀虫剂.Plantsarealsomodifiedtolookbiggerandbetter.Unfortunatelytheendgoalisn'tprovidingnutritionforpeopleit'stoincreaseprofitmarginsandtomakefoodlookbetter.Infactmanymodernfruitsandvegetablesaretwicethesizeofwhattheyusedtobewhilehavingfarlessvitaminsandnottastinggoodeither.Nowresearchisshowingthatgeneticallymodifiedfoodmightevenbebadforyou. GMorganismsareorganismsthathavegenesinsertedintotheirDNAinordertooffercertaincharacteristics.Inthiswayyoucanmakeitbetterormakeitlastlonger. JeffreyM.SmithhaspublishedastudyaboutthedangersofGMfood.ItwasdiscoveredthatwhenGMsoywasfedtofemaleratstheyfoundthatalltheiryoungdiedwithin3weekscomparedtoanatural10%deathrate.Theiryoungwerealsobornsmallerandtheylaterhadproblemsbecomingpregnant.Astudyofpigsfoundthattheyalsobecameinfertile不育aftereatingGMcorn. ManypeopleareeatingGMfoodwithoutevenrealizingit.Thesolutiontothisproblemissimple.Humanbeingsexistedintheircurrentformforhundredsofthousandsofyears.Formostofthattimeweateadietconsistingofmeatfruitvegetablefisheggsandnuts.Thisisouroptimaldietwhichleadsustoliveahealthyandlonglife.Butoverthelast30yearsNorthAmericahasexperienceddiabetescancerandheartdisease.AllduetothemisinformationprovidedbygroupswhoworkonbehalfofthemanufacturersofGMfood.Thewaytoavoidobesityheartdiseaseandcancerisbyeatinglikeourstone﹣ageancestors. 1AccordingtotheauthorwhatultimatelyinspiredthepopularityofGMcrops?C A.Richnutrition. B.Uniquetaste. C.Highprofits. D.Energysaving 2Whathadwebetterdoifwewanttostayhealthyaccordingtothetext?D A.Eatmorefruit. B.Bevegetarians. C.Eatmoregrains. D.Keeptraditionaldiet. 3ThetextisorganizedintheformofB. A.timeandevents B.causeandeffect C.reasoningandargument D.contrastandcomparison 4WecaninferthatthelobbygroupsinParagraph4arepeoplewhoareC. A.scientistswhogiveoutfalseinformationbecauseofcarelessness B.doctorswhotrytoprofitfrompatientswhosufferfromunhealthyfood C.workerswhotrytocheatcustomersforthebenefitsoffoodproducers D.agriculturaltechnicianswhoareresponsibleforpromotingnewproduct
Asanyonewhofreelances做自由职业knowstherearelotsofadvantagesofworkingathomealone.Buttherearedrawbackstoolikethepotentialloneliness.Nowonderco﹣workingspacesarebecomingsopopulartheypermitself﹣employedindividualstofeelliketheyarepartofallofficeenvironmentwhilemakingthemgetsomeworkdonetoo.Butrentingaco﹣workingspacedoescostmoney. NowaSwedishprojectisaimingtochangethatbyturningpeople'sunder﹣usedhomesintotemporaryco﹣workingspacesavailabletofreelancersforfree.HofficewasstartedbyfreelancersChristoferGradinFranzenandJohlineZandraaboutayearagoinStockholmwhentheyinvitedafewpeopleintotheirhomeofficetoworktogether.ItwasagreatsuccessandtheprojecthassincespreadtoanumberofcitiesinEuropeNorthandSouthAmericaAustraliaIndiaandJapan.Anyonecansignupandoffertheirhomespaceasafreeco﹣workingspaceorgofindaHofficenearthem. OnaHofficedayeveryonearrivesandstartsworkatacertainhour.After45minuteseveryonegetsuptotakeabreakstretchdoqigongoryogafor10to15minutes.Afterwardspeoplecangatheraroundagainandre﹣statetheirintentionsandgoalsfortherestoftheworkdayasawaytomotivateeachother.Mealscanbeeatentogetheratacertainhourpotluck﹣style家常饭orbybringingyourownlunch. Thisprocesscreatesanencouragingandsupportiveworkenvironment.AssomefreelancersdescribeByworkingatHofficewegiveourselvesandeachotherthegifttospendourdaysinasocialworkingenvironmentwhereweareextremelyproductivewithoutignoringourotherhumanneeds.Wealsomakesuretogiveusandeachotherwhatweneedtofeelcalmhappyinspiredandcreativeduringtheworkingday. SoHofficeisnotjustaboutsharingspaceit'salsoaboutafreeexchangeofideas.AndperhapsthebestthingisthatHofficesarefreetouse. 1Hofficewasstartedto. A.changepeople'sattitudetowork B.encouragepeopletobemoresocial C.improvepeople'sworkingconditions D.provideaco﹣workingspaceforfree 2What'sthemainideaofParagraph3? A.HowpeoplerespondtoHoffice. B.HowaHofficedayworks. C.WhatpeopleshareatHoffice. D.WhatHofficemeanstopeople. 3Somefreelancers'descriptionsofHofficesuggestthatthey. A.benefitalotfromtheworkingstyle B.worklongerthanbefore C.expectmorepeopletojointhem D.can'tbeseparatedfromeachother 4WhatdoweknowaboutHofficeaccordingtothetext? A.Itisbecomingincreasinglypopular. B.Ithasbeenaroundforquiteafewyears. C.Ithascreatedmanynewjobopportunities. D.Itissuitableforpeoplefromallwalksoflife.
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.
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