首页
试卷库
试题库
当前位置:
X题卡
>
所有题目
>
题目详情
已知x轴上一定点A(1,0),Q为椭圆+y2=1上的动点,求线段AQ中点M的轨迹方程.
查看本题答案
包含此试题的试卷
高一下学期数学《》真题及答案
点击查看
你可能感兴趣的试题
2015年·哈六中一模过椭圆=1a>b>0的左顶点A作斜率为2的直线与椭圆的另一个交点为B与y轴的
已知抛物线x2=y+1上一定点A.-10和两动点P.Q.当PA⊥PQ时点Q.的横坐标的取值范围是__
在平面直角坐标系中点Pxy为动点已知点A.0B-0直线PA和PB的斜率之积为-.1求动点P.的轨迹E
已知抛物线y=x2-1上一定点B.-10和两个动点P.Q.当P.在抛物线上运动时BP⊥PQ则Q.点的
已知x轴上一定点A10Q为椭圆+y2=1上的动点求线段AQ中点M的轨迹方程.
已知x轴上一定点A10Q为椭圆+y2=1上的动点求线段AQ中点M的轨迹方程.
过椭圆=1a>b>0的左顶点A作斜率为2的直线与椭圆的另一个交点为B与y轴的交点为C已知|AB|=|
已知椭圆C.的一个焦点是10两个焦点与短轴的一个端点构成等边三角形.1求椭圆C.的方程2过点Q.40
过椭圆+=1a>b>0的左顶点A.作斜率为2的直线与椭圆的另一个交点为B.与y轴的交点为C.已知1求
已知动圆过定点A.40且在y轴上截得的弦MN的长为8.1求动圆圆心的轨迹C.的方程.2已知点B.-1
已知动圆过定点A.40且在y轴上截得弦长MN的长为8.1求动圆圆心的轨迹C.的方程2已知点B.-10
已知x轴上一定点A10Q为椭圆+y2=1上的动点求线段AQ中点M的轨迹方程.
已知椭圆C.+y2=1a>1的上顶点为A.右焦点为F.直线AF与圆M.x-32+y-12=3相切.1
已知x轴上一定点A10Q为椭圆+y2=1上的动点求线段AQ中点M的轨迹方程.
已知动圆过定点A.40且在y轴上截得的弦MN的长为8.Ⅰ求动圆圆心的轨迹C.的方程;Ⅱ已知点B.-1
对于平面直角坐标系中任意两点P1x1y1P2x2y2称|x1﹣x2|+|y1﹣y2|为P1P2两点的
已知椭圆C.的右焦点为F.10且点﹣1在椭圆C.上.1求椭圆C.的标准方程2已知动直线l过点F.且与
已知动圆过定点A.40且在y轴上截得弦MN的长为8.1求动圆圆心的轨迹C.的方程;2已知点B.-10
已知点P.是直线2x-y+3=0上的一个动点定点M.-12Q.是线段PM延长线上的一点且|PM|=|
2x+y+1=0
2x-y-5=0
2x-y-1=0
2x-y+5=0
已知动圆过定点A.40且在y轴上截得的弦MN的长为8.Ⅰ求动圆圆心的轨迹C.的方程;Ⅱ已知点B.-1
热门试题
更多
如图所示为沿x轴负方向传播的一列简谐横波在t=0时刻的波形图其波速为10m/s.振源在x=5m处.下列说法正确的是
现用频闪照相方法来研究物块的变速运动.在一小物块沿斜面向下运动的过程中用频闪相机拍摄的不同时刻物块的位置如图所示.拍摄时频闪频率是10Hz通过斜面上固定的刻度尺读取的5个连续影像间的距离依次为x1x2x3x4.已知斜面顶端的高度h和斜面的长度s.数据如下表所示.重力加速度大小g=9.80m/s2. 单位cm 根据表中数据完成下列填空 1物块的加速度a=m/s2保留3位有效数字. 2因为可知斜面是粗糙的.
某同学用如图1所示装置探究小车加速度a与所挂钩码质量m的关系.长木板水平固定在桌面上钩码通过轻质细线绕过定滑轮与小车连接固定在小车上的纸带穿过打点计时器.已知每个钩码质量相等分别测得挂123456个钩码时小车的加速度a得到6组a和m. 1下列测量工具中实验需要的有选填序号. A.天平B.刻度尺C.秒表D.弹簧秤 2如图2是某次实验所打的一条纸带0123456是选取的计数点测得相邻两计数点距离分别是x1x2x3x4x5x6已知任意相邻两计数点间的时间相等为T.则打这条纸带过程中小车的加速度大小的计算公式是a=.要求偶然误差最小. 3分析得到的6组a和m的大小关系发现a与m不是正比关系该同学认为这是由于长木板是水平的.这位同学将长木板右端抬高让小车不挂钩码时恰能在长木板上匀速向下运动重新实验测量得到6组a和m这6组a和m大小选填“是”或者“不是”正比关系.
一列简谐横波沿x轴正方向传播t=0时刻波形图如图中的实线所示此时波刚好传到P点t=0.6s时刻的波形如图中的虚线所示abPQ是介质中的质点它们的平衡位置横坐标分别为70cm50cm60cm90cm设波的周期为T则以下说法正确的是
25分阅读下面短文根据所给情节进行续写使之构成一个完整的故事. Bobbywasgettingcoldsittingoutinhisbackyardinthesnow.Bobbydidn'twearbootsorratherhedidn'townany.Thethinsneakersheworehadafewholesinthemandtheydidapoorjobofkeepingoutthecold. Bobbyhadbeeninhisbackyardforaboutanhouralready.Tryashemighthecouldnotcomeupwithanideaforhismother'sChristmasgift.HeshookhisheadashethoughtThisisuseless.EvenifIdocomeupwithanideaIdon'thaveanymoneyforagift. WipingtearsfromhiseyesBobbystartedwalkingdowntothestreetwheretheshopswere.Itwasn'teasybeingsixwithoutafatherespeciallywhenheneededamantotalkto. Bobbywalkedfromshoptoshoplookingintoeachdecoratedwindow.Everythingseemedsobeautifulbutsooutofreach.ItwasstartingtogetdarkandBobbyreluctantlyturnedtowalkhomewhensuddenlyhiseyescaughttheglimmer微光ofthesettingsun'sraysreflectingonsomethingontheroadside.Hereacheddownanddiscoveredashinydime一角硬币. NeverbeforehasanyonefeltaswealthyasBobbydidatthatmoment.Asheheldhisnewly﹣foundtreasurewarmthspreadthroughouthisentirebodyandhewalkedintothefirststore.Hisexcitementquicklyturnedcoldwhensalespersonaftersalespersontoldhimthathecouldnotbuyanythingwithonlyadime. Hesawaflowershopandwentinsidetowaitinline.WhentheshopowneraskedifhecouldhelphimBobbypresentedthedimeandaskedifhecouldbuyoneflowerforhismother'sChristmasgift.TheshopownerlookedatBobbyandhisten﹣centoffering.ThenheputhishandonBobby'sshouldersayingYoujustwaithereandI'llseewhatIcandoforyou. ThesoundofthedoorclosingasthelastcustomerleftpulledBobbybacktoreality.AllaloneintheshopBobbybegantofeelaloneandafraid. 注意 1.所续写短文的词数应为150左右 2.应使用5个以上短文中标有下划线的关键词语 3.续写部分分为两段每段的开头语已为你写好 4.续写完成后请用下划线标出你所使用的关键词语. Paragraph1 Eventuallytheshopownercameoutandmovedtothecounter. Paragraph2 WiththebunchofbeautifulrosesinhishandsBobbybackedoffandthenturnedandran.
25分假定你是李华你的朋友李越面对即将到来的高二期中考试感到学习压力很大不知如何排解写信求助于你.请你用英语写一封信给她提出一些合理的建议内容包括 1.正确对待考试 2.正常休息 3.其他建议. 注意1.词数80左右 2.可以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. DearLiYue Yourstruly LiHua.
静止在水平面上的AB两个物体通过一根拉直的轻绳相连如图所示轻绳长L=1m承受的最大拉力为8NA的质量m1=2kgB的质量m2=8kgAB与水平面间的动摩擦因数μ=0.2现用一逐渐增大的水平力作用在B上使AB向右运动当F增大到某一值时轻绳刚好被拉断g=10m/s2 1求绳刚被拉断时F的大小. 2若绳刚被拉断时AB的速度为2m/s保持此时的F大小不变当A的速度恰好减小为0时AB间的距离为多少
为了把陷在泥坑里的汽车拉出来司机用一条结实的绳子把汽车拴在一棵大树上开始时相距12m然后在绳的中点用400N的力F沿绳垂直的方向拉绳结果中点被拉过60cm如图所示假设绳子的伸长不计则汽车受到的拉力为
1分﹣Doyouknowshecamehere? ﹣YesIdo.Shecamebyplane. A.where B.how C.why D.what
如图是一种锂钒氧化物热电池装置电池总反应为xLi+LiV3O8═Li1+xV3O8.工作时需先引发铁和氯酸钾反应使共晶体熔化下列说法不正确的是
滑雪是一种常见的体育项目具有很强的观赏性半径为R的四分之一圆弧轨道如图所示质量为m的运动员含滑板从A点由静止开始滑下到达最低点B时运动员对轨道的压力为2mg已知轨道半径远大于运动员的身高重力加速度为g运动员下滑的过程中
如图所示一定质量的理想气体从状态A依次经过状态BC和D后再回到状态A.其中A→B和C→D为等温过程B→C和D→A为绝热过程.该循环过程中下列说法正确的是
用NA表示阿伏加德罗常数的值下列叙述不正确的是
1分﹣Hello!MayIspeaktoMike? ﹣.Pleasecallbacklater. A.Waitaminute B.Holdonforamoment C.Speaking D.Sorryheisout
10分Doctorssayangercanbeanextremelydamagingemotionunlessyoulearnhowtodealwithit.Theywarnthatangercanleadtoheartdiseasestomachproblemsheadachesemotionalproblemsandpossiblycancer. 1Somepeopleexpressangeropenlyinacalmreasonableway.Othersburstwithangerandscreamandyell.Butotherpeoplekeeptheirangerinside.Theycannotorwillnotexpressit.Thisiscalledrepressinganger. Foryearsmanydoctorsthoughtthatrepressingangerwasmoredangeroustoaperson'shealththanexpressingit.Theysaidthatwhenapersonisangrythebrainreleasesthesamehormones.Theyspeedtheheartrateraisebloodpressureorsugarintothebloodetc.2 Somedoctorssaythatbothrepressingandexpressingangercanbedangerous.Theybelievethatthosewhoexpressangerviolentlymaybemorelikelytodevelopheartdiseaseandtheybelievethatthosewhokeeptheirangerinsidemayfaceagreaterdangerofhighbloodpressure. 3Theysaythefirststepistoadmitthatyouareangryandtorecognizetherealcauseoftheangerthendecideifthecauseisseriousenoughtogetangryabout.Ifitistheysay4Waituntilyourangerhascooleddownandyouareabletoexpressyourselfcalmlyandreasonably. Doctorssaythatagoodwaytodealwithangeristofindhumorinthesituationthathasmadeyouangry.5 A.Ingeneralthepersonfeelsexcitedandreadytoact. B.Theysaidthatlaughterismuchhealthierthananger. C.Expressingangerviolentlyismoreharmfulthanrepressingit. D.Doctorssaythesolutionislearninghowtodealwithanger. E.Donotexpressyourangerwhileangry. F.Angerisanormalemotionthatweallfeelfromtimetotime. G.Angermaycauseyoucancer.
1分﹣Whywereyoulatethismorning? ﹣IawrongbusandI'msorryforthat. A.gotaway B.goton C.gotin D.gotto
如图所示绝缘粗糙斜面体固定在水平地面上斜面所在空间存在平行于斜面向上的匀强电场E轻弹簧一端固定在斜面顶端另一端拴接一不计质量的绝缘薄板.一带正电的小滑块从斜面上的P点处由静止释放后沿斜面向上运动并能压缩弹簧至R点图中未标出然后返回则
关于一定量的气体下列说法正确的是
1分﹣WouldyoumindifIkeeppetsinthisbuilding? ﹣. A.Great!Ihatepets B.Ofcoursenotit'snotallowedhere C.I'dratheryoudidn'tactually D.Noyoucan't
如图所示电路中理想变压器原副线圈接入电路的匝数可通过单刀双掷开关改变A为交流电流表.在变压器原线圈ab两端加上不变的正弦交变电压.下列分析正确的是
10分Onedayateacherwasgivingaspeechtohisstudents.HeheldupaglassofwaterandaskedtheclassHowheavydoyouthinkthisglassofwateris? Thestudents'answersareintherangefrom20gto500g.Itdoesnotmatterontheweightitself.Itdependsonhowlongyouholdit.IfIholditforaminuteitisOK.IfIholditforanhourIwillhaveanacheinmyrightarm.IfIholditforadayIwillhavetoseethedoctor.ItisexactlythesameweightbutthelongerIholdittheheavieritbecomes. Ifwecarryourburdensallthetimesoonerorlaterwewillnotbeabletocarryon.Theburdenisbecomingincreasinglyheavier. Whatyouhavetodoistoputtheglassdownrestforawhilebeforeholdingitupagain. Wehavetoputdowntheburdensometimessothatwecanberefreshedandareabletocarryon.Sobeforeyoureturnhomefromworktonightputtheburdenofworkdown.Don'tcarryitbackhome.Youcanpickituptomorrow. Whateverburdensyouarehavingnowonyourshouldersletitdownforamomentifyoucan. 1Theteacherbroughtaglassofwatertotheclassbecause. A.hewasverythirsty B.hisarmswerestrong C.it'saphysicslesson D.itwasagoodexample 2TheunderlinedwordrangemeansinChinese? A.依据 B.范围 C.类别 D.重量 3Youcanconcludethatonemayfeelifheputdowntheburdensometimes. A.moreenergetic B.muchheavier C.morestressedout D.happier 4Thiswasalessonabouthowto_. A.keepfitbydrinkingwater B.workoutaphysicsproblem C.relaxoneselfinlife D.holdaschoolparty 5Choosethetruesentenceaccordingtothepassage. A.Youcouldbecomeheavierandheavierifyouheldaglassofwaterinyourhand. B.Allthestudentsintheclassknewwhattheweightoftheglassofwaterexactlywas. C.Theteacherhadagoodwayofmakinghislessonclearandeasytobeunderstood. D.Ifyouletyourburdensdownyourteacherwilllikeyou.
1分Thebooksweresointerestingthattheyinnotime. A.sold B.weresold C.hadbeensold D.wouldsell
如图所示长为L=3m质量为M=2kg的平板车在粗糙水平面上向右滑行当其速度为v=4.5m/s时在其右端轻轻放上一个质量为m=1kg的滑块已知平板车与地面间的动摩擦因数为μ1=0.2滑块与平板车间的动摩擦因数为μ2=0.1则从放上滑块开始到最终二者均静止的过程中下列说法正确的是
7.5分Itseemsthatthenewsindustryhasoneprimaryfocuskeepingpeopleuptodateonthestoriesofthemomentprovidingthebestinsightintoeveryinstancewherethereaderscan'tbetherethemselves.Decadesagothismeantwhennewsbrokejournalistsscrambledtocoveritdeliveringthekeyfactsanalysisandinsight.Theytoldtheiraudienceswhattheyneededtocareaboutandwhatthejournaliststhoughtwasimportant.AllofthisarrivedonyourdoorstepwiththedeliveryofthemorningpaperorwassqueezedintoanhouroflocalandnationalnewsonyourTV. Butwhilethegoalsofanewsorganizationremainthesameastheywereintheheyday全盛时期ofWalterCronkiterevolutionaryforcesbehindthesceneshavefundamentallytransformedtherelationshipthatreadershavewiththenews. Asthenewsmovesfrominktoscreensandthemobileplatformbecomestheforcetobetakenseriouslyjournalistsandthepublicationsthatsupportthemarefacedwithnewchallengesthatextendwellbeyondgatheringthetopstoriesoftheday.Asourdigitalworldexpandsouroptionsfornewsbasedonthefocuswritingstyleviewpointanddesignpublishersarefacedwiththebalancingactofmaintainingthereputationasatrustednewssourcewhiledevelopingnewincentives动机inordertoensuretheirreadership. Whilethenegativeshavebeenwelldocumentedthisongoingevolutionhasalsoresultedinamajorstepforwardforthefutureofjournalism.Ithasforcednewsbrandstolistentotheiraudiencesandbeginaconversationthatforsolongwasone﹣sided.Afterallthewebisopenfordiscussionshouldn'tourjournalismbeaswell? Readersshouldfeelempoweredtonotonlyjointheconversationaboutthenewsbutalsojoinintheeffortoftellingthewholestory.Notonlyareourmobilephonesasourceforustowatchandreadthetopstoriesthey'realsonews﹣gatheringdevicesthatempowercitizenjournaliststofillintheblanksandprovideacomprehensivepictureofthenewslandscape. 1Whatdoestheauthorthinkofthenewsindustryinthepast? A.Therewasnoeasyaccesstonews. B.Journalistsdidn'toftencommentonnews. C.Journalistswereimportantindeliveringnews. D.Publishersdidnotcareaboutreadersthatmuch. 2Thechallengesthatpublishersarefacednowarecausedby. A.people'sdecreasinginterestinnews B.moreoptionsavailablefornews C.alackofideasfornewincentives D.abadreputationofthenewsindustry 3Whatdoesthetextmainlytalkabout? A.Readersshouldbesensitivetonewsaroundthem. B.Readersshouldtakeadvantageofthemobileplatform. C.Readersdon'thavetorelyonjournalistsfornewsnow. D.Readersnowcangetinvolvedintheprocessofdeliveringnews.
如图所示可看成质点的A物体叠放在上表面光滑的B物体上一起以v0的速度沿光滑的水平轨道匀速运动与静止在同一光滑水平轨道上的木板C发生完全非弹性碰撞BC的上表面相平且BC不粘连A滑上C后恰好能到达C板的最右端已知ABC质量均相等木板C长为L求 1A物体的最终速度 2A在木板C上所受摩擦力的大小.
15分Flyingcarsmaysoonbecomea1real.TherideshareserviceUberhasasked2expertfromNASAtheAmericanspaceagency3helpthecompanydevelopcarsthatcanfly. Uberplanstouseflyingvehicles4thefuturetoavoidtrafficinandaroundcities.Thecompanywantstousesmalltotallyelectricaircraft5couldtakeoffandlandlikeahelicopterontopofparkinggarages.Ubersaiditsflyingvehicleswouldbemuch6quietcostlesstooperateandproducelesspollutionthanhelicopters. OnepersoninSanFrancisco7writeonTwitterIusedtothinkflyingcarswasaridiculousidea.8IchangedmymindthismorningwhenIsatinheavytraffic.AnotherpersonaddedfromMumbaiIndiaI'mreadingaboutUber9hireaNASAengineertobuildflyingcarswhileI'mstuckintraffic.Thereishope. Theexpertpredictstherewillbeseveralearlymodelsofflyingcarsthatcan'tfly10theybutwithhumanpilotswithinonetothreeyears.
下列说法正确的是
如图所示A为地球赤道表面的物体B为环绕地球运行的卫星此卫星在距离地球表面的高度处做匀速圆周运动且向心加速度的大小为a已知地球同步卫星的轨道半径为6.6RR为地球的半径引力常量为G.则下列说法正确的是
下列核反应属于人工转变的是
根据临床经验部分药物在体内的代谢也有与原子核衰变相似的规律.药物的血浆半衰期是指药物在血浆中的浓度下降一半所需的时间.某种药物的血浆半衰期为2小时一次合理剂量的用药后药物在血浆中的浓度为20毫克/升若血浆中的药物浓度下降至3毫克/升以下就要补充用药.则该药物的用药时间间隔
热门题库
更多
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
教案备课库
高一上学期物理
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