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如图是抛物线y=ax2+bx+c的一部分，其对称轴为直线x=1，若其与x轴一交点为B（3，0），则由图象可知，不等式ax2+bx+c＞0的解集是 ．
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如图是抛物线y=ax2+bx+ca≠0的一部分已知抛物线的对称轴为x=2与x轴的一个交点是﹣10则方
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如图已知抛物线y＝ax2＋bx＋ca≠0的对称轴为直线x＝－1且抛物线经过A.10C.03两点与x轴
如图某抛物线的对称轴为直线x=2点E.是该抛物线顶点抛物线与y轴交于点C.过点C.作CD∥x轴与抛物
如图已知抛物线y＝ax2＋bx＋ca≠0的对称轴为直线x＝－1且抛物线经过A.10C.03两点与x轴
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抛物线于x轴的一个交点坐标为（﹣2，0）
抛物线与y轴的交点坐标为（0，6）
抛物线的对称轴是直线x=0
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已知抛物线C.y=x2﹣4x.1求抛物线C.的开口方向对称轴和顶点坐标2将抛物线C.向下平移得抛物线
如图是抛物线y=ax2+bx+ca≠0的一部分已知抛物线的对称轴为x=2与x轴的一个交点是-10则方
抛物线与x轴的一个交点坐标为（﹣2，0）
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抛物线y＝ax2＋2ax＋a2＋2的一部分如图所示那么该抛物线在y轴右侧与x轴交点的坐标是_____
如图是抛物线y=ax2+bx+ca≠0图象的一部分已知抛物线的对称轴是x=2与x轴的一个交点是﹣10
4个
3个
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已知抛物线的对称轴是经过点20且与y轴平行的直线抛物线与x轴相交于点A.10与y轴相交于点B.03其
如图抛物线y=x2+bx+c与y轴交于点A.02对称轴为直线x=﹣2平行于x轴的直线与抛物线交于B.
已知抛物线py=ax2+bx+c的顶点为C.与x轴相交于A.B.两点点A.在点B.左侧点C.关于x轴
如图已知抛物线y=ax2+bx+ca≠0的对称轴为直线x=﹣1且抛物线经过A.10C.03两点与x轴
圆柱的轴截面ABCD是边长为2的正方形M.为正方形ABCD对角线的交点动点P.在圆柱下底面内包括圆周
椭圆的一部分
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请写出一个以直线x=﹣2为对称轴且在对称轴左侧部分是上升的抛物线的表达式这条抛物线的表达式可以是等.
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Everyanimalsleepsbutthereasonforthishasremainedfoggy.Whenlabratsarenotallowedtosleeptheydiewithinamonth.1. Oneideaisthatsleephelpsusstrengthennewmemories.2Weknowthatwhileawakefreshmemoriesarerecordedbyreinforcing加强connectionsbetweenbraincellsbutthememoryprocessesthattakeplacewhilewesleephavebeenunclear. Supportisgrowingforatheorythatsleepevolvedsothatconnectionsbetweenneurons神经元inthebraincanbeweakenedovernightmakingroomforfreshmemoriestoformthenextday.3. Nowwehavethemostdirectevidenceyetthatheisright.4Thesynapsesinthemicetakenattheendofaperiodofsleepwere18percentsmallerthanthosetakenbeforesleepshowingthattheconnectionsbetweenneuronsweakenwhilesleeping. IfTononi'stheoryisrightitwouldexplainwhywhenwemissanight′swefinditharderthenextdaytoconcentrateandlearnnewinformation﹣ourbrainsmayhavesmallerroomfornewexperiences. Theirresearchalsosuggestshowwemaybuildlastingmemoriesovertimeeventhoughthesynapsesbecomethinner.Theteamdiscoveredthatsomesynapsesseemtobeprotectedandstayedthesamesize.5YoukeepwhatmattersTononisays. A.Weshouldalsotrytosleepwellthenightbefore. B.It'sasifthebrainispreservingitsmostimportantmemories. C.Similarlywhenpeoplegoforafewdayswithoutsleepingtheygetsick. D.Theprocessestakeplacetostopourbrainsbecomingloadedwithmemories. E.That'swhystudentsdobetterintestsiftheygetachancetosleepafterlearning. F.SleepisthepricewepayforlearningsaysGiulioTononiwhodevelopedtheidea. G.Tononi'steammeasuredthesizeoftheseconnectionsorsynapsesinthebrainsof12mice.
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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.
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Genetechnologyisakindofsciencefocusingontheresearchofhumangenes.Itisalsocalledbiologicalengineeringwhichisdrawingmoreandmoreattentionnow.Sometimesit'sahottopicdiscussedbypeople. Thegreatestthingthatgenetechnologycandoistocureseriousdiseasesthatdoctorsatpresentcanalmostdonothingwithsuchascancerandheartdisease.Everyyearmillionsofpeoplearemurderedbythesetwokillers.Andtodatedoctorshavenotfoundaneffectivewaytocurethem.Butifthegenetechnologyisappliednotonlycanthesetwodiseasesbecuredcompletelybutalsothegreatamountofmoneypeoplespendoncuringtheirdiseasescanbesavedthereforeitbenefitstheeconomyaswell.Inadditionhumanlifespanbanbeprolonged. Genetechnologycanhelppeopletogivebirthtomorehealthyandcleverchildren.SomefamilieswiththeEnglishroyalfamilybeingagoodexamplehavehereditary遗传的diseases.Thismeanstheirchildrenwillforsurehavethefamilydiseasewhichisagreattroubleforthesefamilies.Inthepastdoctorscoulddonothingabouthereditarydiseases.Butgenetechnologycansolvethisproblemperfectly.Scientistsjustneedtofindthewronggeneandcorrectitandahealthychildwillbeborn. Somepeopleareworryingthatthegeneresearchcanbeusedtoproducehumanbeingsinlargequantities.Inthepastfewyearsscientistshavesucceededincloningasheepthereforethesepeoplepredictthathumanbabieswouldsoonbecloned.ButIbelievedclonedbabieswillnotcomeoutinlargequantitiesformostcouplesintheworldcanhavetheirbabiesinverynormalway.Ofcoursethegovernmentsmusttakecaretocontrolgenetechnology. 1Whatdoesthesetwokillersinthesecondparagraphreferto? A.Hereditarydiseasesandcancer. B.Thetwomurdererswhokilledtheclonedbaby. C.Thetwodiseasesofcancerandheartdisease. D.Genetechnologyandanothertreatmentofthetwodiseases. 2What'sthemainideaofthethirdparagraph? A.Genetechnologycanhelppeopletogivebirthtoababy. B.Genetechnologycanbeusedtoclonehumanbabies. C.Genetechnologycanbeusedtotreathereditarydiseases. D.GenetechnologycansolvealltheproblemsoftheEnglishroyalfamily. 3Inwhatwaycangenetechnologyhelptotreathereditarydiseases? A.Usinggenetechnologyhumanbabiescanbecloned. B.Usinggenetechnologyscientistsfindthewronggeneandcorrectit. C.Genetechnologyhelpspeoplewithhereditarydiseasestolivelonger. D.Doctorscancurecancerandheartdiseasewiththehelpoftechnology.
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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
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