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    ;分别过点A,B作x轴的垂线段AA,(共4页)】D.四棱锥C-PEQF 的体积为定值B.|PQ|的最小值为2√2-2坐标原点O到直线 PF2的距离为a,△FPO的面积为a²,则C的离心率为D.直线AB过定点(2,2)B.BE=DFBB,垂足分别为A,B,则四边形AABB的面积为坐标分别为x1,x2,写出x,x2与a的一个关系式:两条切线,切点分别为A,B,则下列描述正确的有三、填空题(本题共3小题,每小题5分,共15分)12.在(x一2)6的二项展开式中,x²项的系数为C.四边形 PEQF 面积的最小值为8A.四边形PEQF 为矩形A.直线I与圆C相交9.下列结论正确的是(1)求cosA;

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    17.(15分)如图,在直四棱柱 ABCD-A,B,C,D,中,底面ABCD 为矩形,E 为棱BB;的中点.(1)若AB=AD,证明:AC⊥DE.(2)设AD=1,AB=2,AA=4,DF=ADE(x>0),且点F到面√2118.(17分)弥已知椭圆E的中心为坐(1)求E的方程与离心率。封①若k=1,求t的取值范围;线②若|MN|=√7,求k的取值范围.内下考不凡小程序要19.(17分)答已知函数f(x)x(x+1)2题(2)若f(x)≥0对x∈(0,七∞)恒成立,求a的取值集合;1x;(1+x;)≥2【高二数学第4页(共4页)】

  • 文博•河南省2025-2026学年第一学期学情分析试卷(9月)八年级数学(华师大)答案

    意,可列方程为6000_4800B.6000_4800600048006000_4800A.x200-xxx-200Cx+200D.200-xx9.如图,AB是OO的直径,OC垂直弦AD于点C,CO的延长线交OO于点E,连接BE,若AB=10,AD=8,则BE的长为)A5B.3C.2、5D.3√510.025中考新动向·综合性试题如图,在常温(25℃)常压时用电热水壶加热一壶水,水的温度y(℃)与时间(分钟)近似满足一次函数关系,当水温达到100℃时停止加热,将茶叶放人热水壶中,在一定时间内,茶水的温度y(℃)与时间x(分钟)近似满足反比例函数关系,已知该种茶水在30℃~50℃时适宜饮用,在40℃时饮用口感最佳.若按照上述程序冲泡一壶这种茶水,并从开始加热时计时,下列说法正确的是)A.加热4分钟时水温上升了75℃B.加热5分钟时水沸腾C.若在口感最佳时饮用,需要等待的时间是21分钟D.这种茶水适宜饮用的时间范围是第12分钟~第20分钟二、填空题:本大题共6小题,每小题4分,共24分11.甘肃省博物馆的东汉铜奔马(马踏飞燕),其马昂首嘶鸣,马尾飘扬,造型生动,马蹄下的飞燕回首惊视,马与燕的组合精妙绝伦,此铜奔马是汉代青铜雕塑艺术的非凡之作.如图,将一张“马踏飞燕”贴纸放在面直角坐标系中,已知A,B两点的坐标分别为(-2,0),(0,3),则点C的坐标为水面图①图②第11题图第15题图第16题图12.不等式-2(x-1)+1>0的解集为13.等腰三角形的三边长为a,b,c,且a,b满足a²+6²-10a-8b+41=0,则c的值可以为(填出一个即可)14.已知点A(a-2,y),B(a-1,y)都在反比例函数y=-的图象上.若y>y,则a的取值范围2为15.筒车是我国古代发明的一种水利灌溉工具,图①是筒车的实景图,图②是其侧面示意图.筒车盛水桶的运行轨道是以轴心0为圆心的圆.已知圆心0在水面上方,且0被水面截得的弦AB长为6米,L0AB=30°,则AB的长为米.(结果用表示)16.如图,菱形ABCD的周长为163,A=60°,点E,F分别在边AB,CD上,连接EF,G是EF上一点,且FG=EF,过点G作GH⊥CD于点H,若AE=CF,DF=FH,则CH的长为数学·原创预测卷(四)第2页(共8页)

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  • 文博•河南省2025-2026学年第一学期学情分析试卷(9月)八年级英语(RAB)答案

    JINMS0ksoyponce全对B:68A:A:nan Province!Have youever bcen there?shif+Ct]ctrlt)B:ngfupis considered theShift+Ctr+fCtrI+GA:The heShift+Ctri+GB:DidCtrl+2Ut+Ctri+2terialcametrI+Gorian六、书面表达(20分)That's a popular street food.d+Shift+elledCtrl+3elled8trltJvours的看法;H+Boriansowderd they4.词数100左右。val oflade itShort Videos: Fun or Harmful?e Silk大洲)cussedumtnel每空ancgnoesrhe bestpart ofmfemayecomescordingfunwithoutthenamoo nova8OO AIQUAD CAMERA

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    thecells changnethods'D,HathaFHovFDust how cells worive in large scalct biological daB.streamed downr mention MD.broke out53.A.giftB.answerC.rushed offD.paylifeC.gradeB.doubtD.panicB.HopefullyC.disbeliefD.Fortunatelyow the AI mC.Importantlygraph5mon valuety.suitab'Jnlockgesture of love and care.odel ExArew题题;波文,从海C.giver.答张hast-j名要ica姓m(physical) apart.下sa内are线red第四部分写作(共两节,满分40分)nated第一节(满分15分)V8WW封你校将以“四月二十二日世界地球日”为主题,举办英语征文比赛。请你写一篇短文投稿,高班级内容包括:弥1.保护世界环境的重要性;2.保护地球的倡议。env注意:1.写作词数应为80个左右;2.请按如下格式在答题卡的相应位置作答。Our Planet,Our Responsibility【高二英语第9页(共10页)】

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    groupof young delegates from around theworldembarked onajourney todiscoverthe secretsofone of themostclassic谷业解析preseriionsoftraditionalChinesemediineCM)PienTzeHuangat thePienTzeHuanguseumZhangzhouFujanProvince.It is renowned for (1)(it)strongeffectsin clearingheat,detoxifying(解毒)the body,cooling theblood,6.B。根据语境可知,此处Fremont是在回忆(recalled)当初resolving stagnant blood(m),and alleviating swellingandpain."TCM has(2)history of5,oooyears,embodying thewisdom and efforts of Chinese people,said Andrea Randisian他被告知自己罹患癌症时的情景。Italian socialmediainfuencer.Afterhisvisit to thePienTzeHuangMuseum,Randisi(3)_(astonish)by theintricate historyandculture behind theprescriptions ofTCM.7.A。根据上文的heonlyhadthreemonthslefttolive可知,此DavideCrocichiaayoung Italianathleticscoach,wasalsoamong thedelegates.Hiskeen(4)TCM.In his view,herbal处指医生预言的三个月。sachets(香)are especiallywell-suited forathletes.Hesaid,“It's so fantastic that onecan achieverelaxationwithout resortingtomedicationThisnatural,gentle,andnoninvasive approach torelaxationis(5)(perfect)in line with the needs of athletes8.C。根据上文的heonlyhadthreemonthslefttolive以及本空Davide planned to introduce this conceptinItaly and incorporateit into daily training,hoping(6)(offer)athletes anew后的therewasnospreadofthedisease可知,医生对于癌症没method of physical andmentalregulation.Mohamed Hesham Elaskary,ayoung professional from the US(7)(work) inamedical technology company,saidTCM有扩散感到很震惊(shocked)。andWesternmedicineare complementary andinterconnected.Hehopedforenhanced(8)(collaborate)between Chineseandforeignmedicalfieldsinthefuture to createbetterformulasand treatment,(9)will promoteglobal health development9.A。在活过了医生预言的三个月时间,并最终被告知自己的Igot tolearnmore aboutTCM andseehowWestern andEasternmedicine cancomplement each other.Itwasfascinatingtoseehow癌症没有扩散之后,Fremont因自己获得(achieved)新生而ancient formulas arebeingused tocreatenew andmore(1o)(advance)medicines today,he added.its2.wasastonished4.uo5.perfectly激动不已。6.tooffer7.workingcollaboration9.which10.advanced10.D。根据下文讲述的他获奖的情况可知,此处指Fremont开始报名参加(signingup)从10公里到马拉松的各种比赛。prescription/prr'skripfn/n.处方,药方resortto求助于,诉诸于intricate/ntrkat/adj.错综复杂的complementary/kompl'mentri/adj.互补的谷业解析答业解析11.C。根据接下来Fremont所说的ThenIbegantowinsomeraces可知,本文的语篇类型是说明文,主题语境是人与自我之生活方式。本文讲述了一群来自世这里是说,Fremont的身体条件对他参加跑步比赛帮助(helped)很大。界各地的年轻代表前往中国福建漳州探索片仔廣的奥秘,并表达了他们对中医文化的赞赏。1.its。考查代词。根据句意可知,空白处所填词为形容词性物主代词,修饰strongeffects,12.A。根据本空后的worldrecordsforthefastestmarathontimeatage故填its。80and90;thefastesthalf-marathon time atage90and91可知,此处指2.a。考查冠词。haveahistoryof意为“有..的历史”,故填a。他保持着令人难以置信的四个头衔(titles)。3.wasastonished。考查动词的时态和语态。根据语境可知,应用过去时态,谓语动词13.D。根据下文Fremont所说的Ithinkitissensiblenottotrytorunastonish与其主语Randisi之间为被动关系,故填wasastonished。4.on。考查固定搭配。bekeenon...意为“喜爱...”。marathonsat100可知,现在Fremont没有打破其他世界纪录的计划5.perfectly。考查词性转换。根据句意可知,此处应填perfect的副词形式perfectly。(plans)6.tooffer。考查非谓语动词。动词不定式短语作hope的宾语,故填tooffer。14.C。根据语境可知,空后的he'shappilyspendinghisdayswithhis7.working。考查非谓语动词。分析句子结构可知,work与其逻辑主语ayoungprofessional之间为主动关系,故填working。family与breakotherworldrecords是相对的,故此处填表示“相反”的8.collaboration。考查词性转换。空白处前有定语enhanced,故填名词collaboration。Instead符合语境。9.which。考查定语从句。分析句子结构可知,空白处所填词引导非限制性定语从句,并在15.B。根据语境可知,这里Fremont是说,他正享受着人生中最美好的从句中作主语,故填which。时光,没有必要再去证明(prove)什么了。10.advanced。考查形容词。空白处所填词修饰medicines,故填advanced,表示“先进的,高级的”。F主题二·生活方式www.xyybs.comP8主题二·生活方式www.xyybs.com·····.你被邀请在你校的英语角做一个关于“Lifestyles”的演讲,请你写一篇100词左右的演讲稿,介绍一种你认为有意义的生活方Pien TzeHuangienTzeHuangisafamousandcommonlyFujian dialect,and Huang refers to“heat,used traditional Chinese medicinetoxicity,swelling,and pain".Together,theyformula in China.Itwasfirstformulatedconvey themeaning:A small pieceis enough tobyaroyal physician of theMingDynasty.It isalleviate the condition of"Huang”.composedofavarietyofprecious traditionalIn2oi1,thecraftsmanshipof Zhangzhou'sChinese medicinal materials,including Sanqi,Pien Tze Huangwas listed as a nationalShexiang,Niuhuang,and shedan,whichintangible cultural heritage.ThePienTzeHuangtogethercontribute toitseffects.ThenamePienTzeHuang derivesfrompill,a Grade-1protected traditional Chinesethree characters:Pien means“a piece”,Tzeis anmedicine,hasconsistentlyranked among thetopexclamatory(惊叹的)expressioninthesouthernexportsof Chinesemedicines.?One possible version:Embracinga zero-waste lifestyle>>>>>>Good morning,everyone!Today,Iwant to share withyouthebeautyofazero-wastelifestyle.It'seasierthanyoumight think to startmaking small butimpactful changes inourdailylives.Forexample,insteadofrelyingontakeoutTHANKSmeals,wecanpreparedeliciousfoodathome,andeventurn leftovers into creative snacks.By practicingcompostingandproperlyrecyclingthings,wecansignificantlyreducewaste and lessen ourenvironmentalimpact.Let'stakeactiontogetherand embracethislifestyleto createa greener,more sustainablefuture.Thankyou!www.xyybs.comP8主题二·生活方式www.xyybs.com·····.Discoveringsecretsof TcMBy GaoYuxi探秘中医。阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。易读度:71words:304time:6mins★★6

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