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已知二次函数y=ax²+bx+c（a≠0）的图象经过A（-1，0），B（3，0）两点，并与y轴交于点C（0，3），抛物线的顶点为D．（1）求出此二次函数的解析式；（2）在抛物线的对称轴上是否存在点E...
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Whenaskedabouthappinessweusuallythinkofsomethingextraordinaryanabsolutedelightwhichseemstogetrarertheolderweget. Forkidshappinesshasamagicalquality.Theirdelightatwinningaraceorgettinganewbikeisunreserved毫无掩饰的. Intheteenageyearstheconceptofhappinesschanges.Suddenlyit'sconditionalonsuchthingsasexcitementloveandpopularity.Icanstillrecalltheexcitementofbeinginvitedtodancewiththemostattractiveboyattheschoolparty. Inadulthoodthethingsthatbringdeepjoy﹣lovemarriagebirth﹣alsobringresponsibilityandtheriskofloss.Foradultshappinessiscomplicated复杂的. Mydefinitionofhappinessisthecapacityforenjoyment.Themorewecanenjoywhatwehavethehappierweare.It'seasytooverlookthepleasurewegetfromthecompanyoffriendsthefreedomtolivewherewepleaseandevengoodhealth. Iexperiencedmylittlemomentsofpleasureyesterday.FirstIwasoverjoyedwhenIshutthelastlunch﹣boxandhadthehousetomyself.ThenIspentanuninterruptedmorningwritingwhichIlove.WhenthekidsandmyhusbandcamehomeIenjoyedtheirnoiseafterthequietoftheday. Psychologiststellusthattobehappyweneedamixofenjoyableleisuretimeandsatisfyingwork.Idon'tthinkthatmygrandmotherwhoraised14childrenhadmuchofeither.Shedidhaveanetworkofclosefriendsandfamilyandmaybethisiswhatsatisfiedher. Wehoweverwithsomanychoicesandsuchpressuretosucceedineveryareahaveturnedhappinessintoonemorethingwe'vegottohave.We'resoself﹣consciousaboutourrighttoitthatit'smakingusmiserable.Sowechaseitandequalitwithwealthandsuccesswithoutnoticingthatthepeoplewhohavethosethingsaren'tnecessarilyhappier. Happinessisn'taboutwhathappenstous﹣it'sabouthowweseewhathappenstous.It'stheskillfulwayoffindingapositiveforeverynegative.It'snotwishingforwhatwedon'thavebutenjoyingwhatwedopossess. 1Asonegrowsolderone. A.tendstobelieveresponsibilitymeanshappiness B.associateshis/herhappinesslesswithothers C.willtakefewerrisksinpursuinghappiness D.feelsithardertoexperiencehappiness 2WhatcanwelearnabouttheauthorfromParagraphs5and6? A.Shecareslittleaboutherownhealth. B.Sheiseasilysatisfiedbythingsindailylife. C.Sheenjoysthefreedomoftraveling. D.Sheprefersgettingpleasurefromhousework. 3Peoplewhoequalhappinesswithwealthandsuccess. A.paytoomuchattentiontotheirrighttohappiness B.considerpressuresomethingblockingtheirway C.areatalosstomakecorrectchoices D.aremorelikelytobehappy 4Whichofthefollowingcanbestexplainthemainideaofthepassage? A.Godhelpsthosewhohelpthemselves. B.Eachmanisthemasterofhisownfate. C.Happyishewhoiscontent. D.Successleadstohappiness.
InthedepthsoftheFrenchGuianeserainforesttherestillremainunusualgroupsofindigenous土著的people.Surprisinglythesepeoplelivelargelybytheirownlawsandtheirownsocialcustoms.AndyetpeopleinthisareaareinfactFrenchcitizensbecauseithasbeenacolony殖民地oftheFrenchRepublicsince1946.IntheorytheyshouldlivebytheFrenchlawisoftenignoredorunknownthusmakingthemintoaninterestingareaof'lawlessness'intheworld.ThelivesofthesepeoplehavefinallybeenrecordedthankstotheeffectsofaFrenchmanfromPariscalledGin.Ginspentfivemonthsinearly2015exploringthemostremotecornersofthisareawhichsitsontheedgeoftheAmazonrainforestwithhalfitspopulationofonly250000livinginitscapitalCayenne.'IhaveaspeciallovefortheFrenchGuianesepeople.Ihaveworkedthereonandoffforalmosttenyears'saysGin.'I'vebeenabletokeepfirmfriendshipswiththem.ThusIhavebeenallowedtogainaccesstotheirlivingenvironment.Idon'tseeitasalawlessland.ButratherIseeitasanareaoffreedom.''Iwantedtoshowtheaudienceaphotographicrecordtouchingupontheuncivilizedlife'continuesGin.'Iprefertoworkinblackandwhitewhichallowsmetoshowdifferentspecificworldsmoreclearly.'Hisblack﹣and﹣whitepicturespresentaworldalmostlostintime.Thesepicturesshowpeopleseeminglypushedintoaworldthattheywereunpreparedfor.Theselocalcitizensnowhavetobalancetheirtraditionalself﹣supportinghuntinglifestylewiththelifestyleofferedbythemodernFrenchRepublicwhichbringswithitnotonlynecessarystatewelfarebutalsoalcoholismbetrayalandevensuicide.1WhydoestheauthorfeelsurprisedabouttheindigenouspeopleinFrenchGuiana?A.TheyseldomfollowtheFrenchlaw.B.TheyoftenignoretheGuianeselaw.C.Theyareseparatedfromthemodernworld.D.TheyarebothGuianeseandFrenchcitizens.2GinintroducedthespecialworldoftheindigenousGuianeseas.A.atourguideB.ageographerC.afilmdirectorD.aphotographer3WhatisGin'sattitudetowardsthelivesoftheindigenousGuianese?A.Cautious.B.Doubtful.C.Uninterested.D.Appreciative.4Whatdoestheunderlinedword'it'inthelastparagraphreferto?A.ThemodernFrenchlifestyle.B.Theself﹣supportinghunting.C.Theuncivilizedhunting.D.TheFrenchRepublic.
AdraftofChina'sfirst1environmentprotectiontaxlawsubmittedtothetoplegislative立法机构bodyforinitialdiscussiononMondaymayimpose2heavypenalties处罚onpollutersthaneverbefore. TheStandingCommitteeoftheNationalPeople'sCongressreadthedraftduring3bimonthlymeetingfromMondaytoSaturday. Thedraftdesignatesfourtaxabletypesofpollution﹣airborneandwaterpollutantssolidwasteandnoise.Companiesandindividuals4directlydischargethese5subjecttothetaxFinanceMinisterLouJiweitoldthetoplegislatorsonMondaymorning. Thedraft6adoptthecurrentstandardsforpollutantdischargefeesasthelowerrangeandprovinciallevelgovernmentswouldhavetheauthority7raisetaxfeesbasedontheenvironmentalsituationintheirjurisdictionsLousaid. Thedraftalsostipulatesincentivestoreduceemissions8saythetaxpayerscouldreceivea50percentreduction9theyloweredtheirairborne10waterpollutantemissionsbyhalfofthenationalorprovincialstandards.
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WaystoSaveTime Weallwishwehadjustabitmoretime.Justthinkwhatyoucoulddowithanextrahourortwoeachday:youcouldfinallysticktoanexerciseroutineorspring﹣cleanthehouseorwriteyournovelorlearntheguitarandsoon. 1ButIcanhelpyoufindmorehoursinyourdayforthethingsthatreallymatter. 1.GetOutofBedEarlier Ifyounormallygetupat7;30a.m.trygettingupat7:00a.m.Thathalf﹣hourmightnotsoundlikemuchbutitcouldbetimethatyouusetoexercisetoreadthatbookyou'vebeenmeaningtofinish.2 2.DotheImportantTasksFirst Onceyougettoworkgettheimportantonesdonefirstnottheeasyonesoreventheurgentones.Youcanaffordtospendatleastanhourworkingonbigimportanttasksratherthanonallthoselittleurgentones. 3Theurgenttaskswillstillgetdoneandyouwon'tmisstheimportantones. 3.ReduceInterruptions Ifcolleagueshaveahabitofhangingaroundyourdesktochatorifthephoneisconstantlyringingyoumightfindthatittakesyouhalfthedaytofinishasimpletasklikewritingaletter.Constantinterruptionsdon'tjusteatuptimetheyalsobreakyourconcentration. Whenyou'vegotabigtasktofocusonletyourcallsgotovoicemail.4Wearingheadphonesmakesitlesslikelythatpeoplewilltrytostrikeupaconversation. 4.5 Afewminuteschattingbrowsingthewebandsooncaneasilyturnintohoursofwastedtimeoverthecourseofaday. Whenyou'reworkingwork.Ifyourconcentrationisslippingtakeaproperbreak:goandgetaglassofwaterorstretchyourlegsabit.Andifyou'refacingadifficulttasktrybreakingitintosmallstepsorstagessothatit'seasiertodealwith. A.StayFocusedonYourWork. B.TakeBreaksWhenNecessary. C.Ifyouhaveanofficedoorcloseit. D.Ifyouworklikethisyou'llusuallysavetime. E.Wouldyouwantmetomakeyourdaylonger? F.Ican'tmagicallymakeallyourdays25hourslong. G.Orsimplytogetyourdayofftoacalmandorganizedstart.
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Mostpeopleagreethathonestyisagoodthing.ButdoesMotherNatureagree?Animalscan'ttalkbutcantheylieinotherways?Cantheyliewiththeirbodiesandbehavior?Animalexpertsmaynotcallitlyingbuttheydoagreethatmanyanimalsfrombirdstochimpanzeesbehavedishonestlytofoolotheranimals.Why?Dishonestyoftenhelpsthemsurvive. Manykindsofbirdsareverysuccessfulatfoolingotheranimals.Forexampleabirdcalledtheploversometimespretendstobehurtinordertoprotectitsyoung.Whenapredator猎食动物getsclosetoitsnesttheploverleadsthepredatorawayfromthenest.How?Itpretendstohaveabrokenwing.Thepredatorfollowsthehurtadultleavingthebabybirdssafeinthenest. Anotherkindofbirdthescrubjayburiesitsfoodsoitalwayshassomethingtoeat.Scrubjaysarealsothieves.Theywatchwhereothersburytheirfoodandstealit.Butcleverscrubjaysseemtoknowwhenathiefiswatchingthem.Sotheygobacklaterunburythefoodandburyitagainsomewhereelse. Birdscalledcuckooshavefoundawaytohavebabieswithoutdoingmuchwork.How?Theydon'tmakenests鸟巢.Insteadtheygetintootherbirds'nestssecretly.Thentheylaytheireggsandflyaway.Whenthebabybirdscomeouttheiradoptive收养的parentsfeedthem. Chimpanzeesorchimpscanalsobesneaky.Afterafightthelosingchimpwillgiveitshandtotheother.Whenthewinningchimpputsoutitshandtoothechimpsarefriendlyagain.Butananimalexpertoncesawalosingchimptakethewinner'shandandstartfightingagain. Chimpsaresneakyinotherwaystoo.Whenchimpsfindfoodthattheylovesuchasbananasitisnaturalforthemtocryout.Thenotherchimpscomerunning.Butsomecleverchimpslearntocryverysoftlywhentheyfindfood.Thatwayotherchimpsdon'thearthemandtheydon'tneedtosharetheirfood. AschildrenmanyofuslearnthesayingYoucan'tfoolMotherNature.Butmaybeyoucan'ttrusthereither. 1Aploverprotectsitsyoungfromapredatorby. A.gettingclosertoitsyoung B.drivingawaytheadultpredator C.leavingitsyounginanothernest D.pretendingtobeinjured 2ByChimpanzeesorchimpscanalsobesneakyparagraph5theauthormeans. A.chimpsarereadytoattackothers B.chimpsaresometimesdishonest C.chimpsarejealousofthewinners D.chimpscanbeselfishtoo 3Whichofthefollowingistrueaccordingtothepassage? A.Cuckoosfooltheiradoptiveparentsbymakingnonests. B.Thelosingchimpwonthefightbytakingthewinner'shand. C.Somechimpslowertheircrytokeepfoodawayfromothers. D.Somecleverscrubjaysoftenstealtheirfoodback. 4Whichofthefollowingmightbethebesttitleofthepassage? A.Doanimalslie? B.DoesMotherNaturefoolanimals? C.Howdoanimalslearntolie? D.Howdoeshonestyhelpanimalssurvive?
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TenyearsagoSeanCarterwasastudentatuniversity.Onenighthewas1inacarwithafriendwhohadbeendrinking.They2andSeanwasleftinawheelchair3abraininjury.HehasbeenunabletowalkortalksincethenandhismomJennyhasbeen4him. Whatwereyoufeeling5youfoundoutIhadbeeninacar6?Seanaskshismom.Seanspeaksbyusinghisfingerto7wordsontoaniPad.Thosewordsarethentranslatedintoaudio.IwasshockedJennysays.Itwasjustsohardseeingyourchild's8bodyinabedforsolong.Youcouldn'tdoanythingfortwoyears. OvertheyearsSeanhasbecomemore9thoughhesayshe'snotyetreadytodoeverythingalone.it's10livingwithyourmomwhenyou're32yearsoldJennysayswhileSean11andrepliesOhyeah! Jenny63thenaskshersonIfthiswasourlast12whatwouldyouwanttosay? Letme13yourightthereSeantellshismom.Iknowyouwillbehereformanyyearsto14.ButIwantyoutoknowhow15Iamforwhatyouhavedoneforme.Yougaveupyourlifetogivemealife. Yeah.Butit'sOKJennyresponds.16isreallythevaluegoodsthatwehaveandifyoucan17timewithsomebodyelsethat'sprobablythemostimportantthingyoucandoforsomeone.It'stheonlythingthat18. SeanrepliesIdon'tsaythisenough.You'rethepictureofunconditional19.Iadmireyour20tobethebestmomyoucanbeandyoudoafinejob.Iloveyoubeyondthemoonandback. 1A.chatting B.arguing C.driving D.playing 2A.crashed B.dashed C.attacked D.struggled 3A.of B.with C.for D.on 4A.givinginto B.takingcontrolof C.lookingforwardto D.takingcareof 5A.before B.through C.when D.because 6A.accident B.seat C.road D.track 7A.put B.type C.draw D.move 8A.strong B.heavy C.soft D.lifeless 9A.independent B.generous C.clever D.careful 10A.hard B.interesting C.foolish D.funny 11A.worries B.laughs C.cries D.complains 12A.dinner B.trip C.operation D.conversation 13A.reward B.forget C.stop D.expect 14A.come B.spend C.waste D.disappear 15A.regretful B.thankful C.painful D.understanding 16A.Hardship B.Friendship C.Emotion D.Time 17A.kill B.save C.share D.calculate 18A.matters B.survives C.lasts D.lives 19A.joy B.reward C.apology D.love 20A.idea B.duty C.story D.confidence
计算2x+3y²
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假如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的以下作文.文中共有10处错误每句中最多有两处.错误涉及单词的增加删除或修改. 增加:在缺词处加一个漏词符号∧并在此符号下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错词下面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. Mysoccercoachretiredinlastweek.Iwantedtodoanythingspecialforhimathisretirementparty.MymummakesthebetterbiscuitsintheworldsoIdecidetoaskherforhelp.Mumtaughtmesomebasicstepofbaking.Iinsistedondoingmostofthebakingmyself.Ithoughtthebiscuitswerereallywell.MyonlymistakewasthatIdroppedsomeonthefloorafterIwaspackingthemup.AtapartymycoachwithabiscuitinhismouthaskedsurprisinglywhomadethemandjokedImighthavetoretireagainnextyearjustgetsomemoreofthesebiscuits. Myfavoritepictureatthepartyisofmycoachandmeenjoythebiscuitswithhappylaughter!
计算-+1²
甲每小时行4千米乙每小时行5千米则甲乙一小时共行千米y小时共行千米．
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