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一次函数y=kx+4与二次函数y=ax2+c的图象的一个交点坐标为(1,2),另一个交点是该二次函数图象的顶点 (1)求k,a,c的值; (2)过点A(0,m)(0<m<4)且垂直于y轴的直线与...
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一次函数y=x-3的图象与x轴y轴分别交于点A.B.一个二次函数y=x2+bx+c的图象经过点A.B
正比例函数y=kx和一次函数y=ax+b的图象都经过点A12且一次函数的图象交x轴于点B40.求正
已知一次函数y=的图象与x轴y轴的交点分别为B.C.二次函数的关系式为y=ax2-3ax-4aa
正比例函数y=kx和一次函数y=ax+b的图象都经过点A.12且一次函数的图象交x轴于点B.40.求
已知一次函数y=kx﹣4当x=2时y=﹣3.1求一次函数的解析式2将该函数的图象向上平移6个单位求平
一般地一次函数y=kx+b的图象上任意一点的坐标都是二元一次方程kx-y+b=0的一个解以二元一次方
二次函数y=ax2+bx+c的图象过A﹣30B10C03点D在函数图象上点CD是二次函数图象上的一对
已知一次函数y=kx-4当x=2时y=-3.1求一次函数的解析式2将该函数的图象向上平移6个单位求平
已知A﹣42B2﹣4是一次函数y=kx+b的图象和反比例函数图象的两个交点.1求反比例函数和一次函数
已知一次函数y=kx-k+4的图象与y轴的交点坐标是0-2那么这个一次函数的表达式是________
在平面直角坐标系中一次函数y=kx+b的图象与x轴y轴分别相交于A.﹣30B.0﹣3两点二次函数y=
正比例函数y=kx和一次函数y=ax+b的图象都经过点A12且一次函数的图象交x轴于点B40.求正比
已知一次函数y=kx-4当x=2时y=-3.1求一次函数的解析式.2将该函数的图象向上平移6个单位求
一次函数y=kx+b的图象与正比例函数y=2x的图象平行且经过点
(1,-2),则一次函数的解析式为( ) A.y=2x+4
y=2x-4
y=-2x+4
y=-2x-4
如图已知一次函数y=0.5x+2的图象与x轴交于点A.与二次函数y=ax2+bx+c的图象交于y轴上
已知二次函数图象的顶点在原点O.对称轴为y轴.一次函数y=kx+1的图象与二次函数的图象交于A.B两
已知二次函数y=ax2a≠0与一次函数y=kx-2的图象相交于AB两点如图所示其中A-1-1求△OA
本题10分一次函数y=x-3的图象与x轴y轴分别交于点A.B.一个二次函数y=x2+bx+c的图象经
一般地一次函数y=kx+bk≠0的图象与x轴的交点的________坐标是一元一次方程kx+b=0的
如图已知二次函数y=ax2+bx+c的图象过A20B0﹣1和C45三点.1求二次函数的解析式2设二次
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Ourhomegalaxy星系theMilkyWaymakesforaprettyspacepictureanditlooksnormalatadistance.Butanew3Dmaprevealsasurprise_____.TheMilkyWayisaspiral漩涡型的galaxyinwhichstarsandgascloudsexistmainlyinitsspiral'arms'.OurmassiveneighbortheAndromedagalaxy仙女座isalsospiral.Spiralgalaxiesusuallyappearveryflatandeasytoseethroughatelescopesaidtheresearchers.Using1339largepulsating脉冲的starstomakea3DmapoftheMilkyWayresearchersdiscoveredinsteadthatthegalaxy'sdiskofstarsisincreasinglytwistingmostlikelyduetothespinningofthedisk.Andthefartherthestarsarefromthecenterthemoretwisteditbecomes.Previouslyastronomerssawevidenceofhydrogencloudsbecomingwarped弯曲的intheMilkyWayThisisn'tcompletelyabnormalbecauseastronomershavenoticedthesamepatternofprogressivelytwistingspiralsinaboutadozenothergalaxies.Butitdoeshelpthemmakemoresenseofourgalaxy.Becauseweliveinthisgalaxythatmakesithardertoobserveanddustandstarlightmakeitevenmoredifficultwhenusingtelescopes.Tryingtodeterminewhatourgalacticcenterlookslikeissimilartotryingtofindthecenterofaforestyou'restandingin.'ItisextremelydifficulttodeterminedistancesfromtheSuntopartsoftheMilkyWay'soutergasdiskwithouthavingaclearideaofwhatthatdiskactuallylookslike'leadstudyauthorXiaodianChenoftheChineseAcademyofSciencesinBeijingsaidinastatement.FromafartheMilkyWayappearslikeathinrotating旋转的diskofstarsorbitingthecentereveryfewhundredmillionyears.Inthecenterhundredsofbillionsofstarsanddarkmatterholdthegalaxytogether.Butasyoumovetowardtheoutermostreachesofthegalaxythegravitationalglueofthecenterfades.IntheouterdiskthiskeepshydrogengasfrombeingrestrictedwhichcontributestoanS﹣shapedwarping.'Somewhattooursurprisewefoundthatin3Dourcollectionof1339starsandtheMilkyWay'sgasdiskfolloweachotherclosely.Thisoffersnewinsightsintotheformationofourhomegalaxy'RicharddeGrijsseniorstudyco﹣authorandprofessoratMacquarieUniversity'sDepartmentofPhysicsandAstronomysaidinastatement.'PerhapsmoreimportantlyintheMilkyWay'souterregionswefoundthattheS﹣likestellar星的diskiswarpedinaprogressivelyTwistedspiralpattern.'Sothemassiveinnerdisk'srotationalforcecausestheouterdisktowarptheresearchersconcluded.'Thisresearchprovidesacrucialupdatedmapforstudiesofourgalaxy'sstellarmotionsandtheoriginsoftheMilkyWay'saidLicaiDengco﹣authorandseniorresearcherattheChineseAcademyofSciencesinastatement.1Whichofthefollowingmightbethemissingsentenceinthefirstparagraph?A.TheMilkyWayisbeingwarpedandtwistedbyitsstars.B.TheMilkyWayisspiralandorbitingitselfallthetime.C.Theformationofourhomegalaxyisduetotheforceofgravity.D.TheoriginoftheMilkyWayliesinitsrotationalforce.2Whatdoestheunderlined'this'referto?A.theMilkyWayB.thegravitationalglueC.thefadingofgravityD.theoutermostreachofthegalaxy3Whichofthefollowingistrueaccordingtothepassage?A.Thegalaxyweliveinisuniqueforitsspecialspirals.B.ThestarsinthecenteroftheMilkyWayaremoretwisted.C.Thedistancefromthesuntootherstarsisalreadyknowntoscientists.D.TherotationofitsinnercenterforcestheMilkyWaytotwist.4Whatisthesignificanceofthisfinding?A.ItrevealswhytheMilkyWayisaflatandspiralgalaxy.B.Itleadstoabreakthroughofusing3Dtechnologyinspaceresearch.C.ItprovesapreviouswayofobservingtheMilkyWaywhilewearelivinginit.D.ItcontributestoourknowledgeabouttheMilkyWay.
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DotherightThingInlifepeoplefeelmostsatisfiedwhentheychooseoptionsthatsidewiththeirmostdeeplyvalues.Here'showtostaytruetoyours.Ifyouhopetohaveyourlifeshapedaccordingtoyouridealsyouhavetoknowwhatthoseidealsare.Perhapsbeginsessionsbyidentifyingtheconceptsthataremostimportantfromalisthonestystructurefamilyandsoon.Thosequalitiesareinfluencedbyyourparents.yourcultureandsocietyasawholebutyouhavetotakeownershipofyourowndecisions.Almostallofthesequalitiesarethingsmostofusdesiretoholddear.Todeterminewhichprinciplesaremorethanjustdesiresreflectonsituationsthatresonatetngwithyourself.Identifyingyourvalueswillguideyouintherightdirectionbutafewstrategiescanhelpyoufollowthrough.Beforeyoumakeabigdecisiondosomethingthatwillputyouinhighspiritsexercisesocializewithfriendsvolunteer.Researcherstheorizethatsuchactivitiesimproveourmoodwhichpromotesdopaminelevelsincertainareasofthebrainimprovingourcognitiveabilitiesandhelpingusweighdifferentoptions.Troubleisthetoughestdecisionsoftenarriveatthemostinconvenienttimes.whenyou'reunderforce.askafamilymember.afriendor.incertaincasesaprofessionalforadvice.Theycanprovideadvicethat'snotslightlyinfluencedbytheworkdeadlineorleakyroofgraduallyweakeningyourmentalenergy.Ofcourse.peoplemakedecisionsthatcontradicttheiridealsallthetime.TherearelotsofvaluesweholddearandtheyfrequentlycomeintoconflictwithoneanotherIt'snotsomuchthatpeopledon'tknowwhattheywantit'sthattherearemanythingswedesireandwedon'talwaysknowhow.Whileasingledecisioncanseemlikeatug﹣of﹣warbetweencompetingdesiresbroaderlifechoicesdon'tneedtobeadefinitiveeither/orquestion.Onewholikestravelingworldwidemighttemporarilyputoffagrandtriptoexplorelocationsclosertohomeorcommittosettingasidetimeforvacationwiththeirfamilyeverysummernomatterwhatelsecomesup.Surroundyourselfwithpeoplewhobesidessharingyourpassioncanalsopreventyoufromhesitating.AgroupcanremindyouHeyweredoingthisbecauseweloveit.'Ifyou'restillstruggling.evenafterseekingoutcommunitysupportthere'snoshameinrevisingyourcorevalues.Ifyou'redeterminedtotakepartinacharityprogrambutspendtheeveningwithfriendsinsteaditmaybetimetoacceptthatfriendshipismoreimportanttoyouthanvolunteerism.Betteryetfindopportunitiestocontinuethecharityprogramwithyourfriends.Youmaylearnthatwhatyoubelievedwasacorepriorityactuallyhasmuchmoretodowithlivinguptowhatyourparentsco﹣workersorothersexpect.Ifyourvaluesagreewithwhoyoureallyarenoiewillhavetoaskyoutomakethosechoices.
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