河南省洛阳市孟津县第二高级中学2020-2021学年高二数学9月周练试题【含答案】

合集下载

河南省洛阳市孟津县第二高级中学2021-2022高二数学9月周练试题.doc

河南省洛阳市孟津县第二高级中学2021-2022高二数学9月周练试题.doc

河南省洛阳市孟津县第二高级中学2021-2022高二数学9月周练试题注意事项:本试卷分第I 卷(选择题)和第Ⅱ卷(非选择题)两部分。

考试时间120分钟,满分150分。

考生应首先阅读答题卡上的文字信息,然后在答题卡上作答,在试题卷上作答无效。

交卷时只交答题卡。

第Ⅰ卷一、选择题:(本大题12个小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.) 1.等差数列{n a }中,3a =2,5a =7,则7a =A .10B .20C .16D .12 2.设集合A ={x |0<x<1},B ={x |0<x<3},那么“m ∈A ”是“m ∈B ”的 A .充分不必要条件 B .必要不充分条件C .充要条件D .既不充分也不必要条件 3.已知△ABC 的周长为20,且顶点B (0,-4),C (0,4),则顶点A 的轨迹方程是A .213620x 2y +=(x ≠0)B .212036x 2y +=(x ≠0) C .21620x 2y +=(x ≠0) D .21206x 2y +=(x ≠0) 4.不等式312x x--≥0的解集是 A .123x x ⎧⎫≤≤⎨⎬⎩⎭|B .123x x ⎧⎫≤⎨⎬⎩⎭|< C .123x x x ⎧⎫≤⎨⎬⎩⎭|或> D .13x x ⎧⎫⎨⎬⎩⎭|> 5.在等比数列{n a }中,若357911243a a a a a =,则2911a a 的值为A .9B .1C .2D .36.三角形两条边长分别为2和3,其夹角的余弦值是方程22x -3x +1=0的根,则此三角形周长为AB . 7C .5D .5+7.若实数x 、y 满足2,,y ,x x ≤⎧⎪≤⎨⎪≥⎩y 3+1则S =2x +y -1的最大值为A .6B .4C .3D .2 8.在△ABC 中,a 、b 、c 分别是∠A 、∠B 、∠C 所对应的边,∠C =90°,则a bc+的取值范围是A .(1,2)B .(1)C .(1]D .[1] 9.在△ABC ,若cos cos A B =b a =43,则△ABC 是 A .直角三角形 B .等腰三角形 C .等腰或直角三角形 D .钝角三角形 10.设定点M (3,103)与抛物线2y =2x 上的点P 的距离为1d ,P 到抛物线准线l 的距为2d ,则1d +2d 取最小值时,P 点的坐标为A .(0,0)B .(1)C .(2,2)D .(18,-12) 11.已知1F 、2F 是椭圆2221x a b2y +=(a>b>0)的两个焦点,以线段1F 2F 为边作正三角形 M 1F 2F ,若边M 1F 的中点在椭圆上,则椭圆的离心率是A .12 B 1 C .12D 1 12.空间直角坐标系中,O 为坐标原点,已知两点坐标为A (3,1,0),B (-1,3,0),若点C 满足OC =αOA +βOB ,其中α,β∈R ,α+β=1,则点C 的轨迹为 A .平面 B .直线 C .圆 D .线段第Ⅱ卷二、填空题:(本大题共4个小题,每小题5分,共20分.将答案填在答题卡上相应位置) 13.数列{n a }的通项公式为n a =2n -9,n ∈N ﹡,当前n 项和n S 达到最小时,n 等于_________________.14.若双曲线214x m 2y -=的右焦点与抛物线2y =12x 的焦点重合,则m =______________.15.在△ABC 中,∠A =60°,b =1,ABC S ∆cos aA=_______________. 16.在下列命题中,①0x ∃∈R ,20x +20x +2≤0的否定;②若m>0,则方程2x +x -m =0有实根的逆命题;③渐近线方程为y=34x的双曲线的离心率为54;其中真命题的序号是__________________.三、解答题:(本大题共6个小题,共70分)17.(本小题满分10分)给定两个命题,p:对任意实数x都有2x+ax+1>0恒成立;q:函数y=logax(a>0且a≠1)为增函数,若p假q真,求实数a的取值范围.18.(本小题满分12分)在△ABC中,BC,AC=3,sinC=2sinA.(Ⅰ)求边长AB的值;(Ⅱ)求△ABC的面积.19.(本小题满分12分)某公园计划建造一个室内面积为800m2的矩形花卉温室.在温室内,沿左、右两侧与后侧内墙各保留1m宽的通道。

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考地理试卷含答案

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考地理试卷含答案

6.阶段 I 的牛奶生产基地形成的主要区位因素是( C )
A.水源状况 B.科学技术
C.市场需求
D.草场分布
7.发展到阶段Ⅱ以后,乙、丙两地区的牛奶完全由甲地区输入,其主要原因是
(B)
①乙、丙两地区城市化发展造成地价上涨
②甲地区的牛奶生产成本较低,市场竞争力强
③交通运输条件的改善和保鲜、冷藏技术的发展
(2) 地处青藏铁路沿线,交通运输便利;(1 分)野生黑枸杞药用价值和 营养价值较高,消费市场广阔;(1 分)地处西部地区,经济扶持政策优惠;(1 分) 科技投资力度不断加大,人工抚育与栽培技术不断提高。(1 分) (任答 3 点,3 分)
野生黑枸杞是青海省荒漠戈壁地区主要的建群植物之一.青海省野生黑枸杞 资源丰富,品质优良,具有颗粒饱满、汁浓甘甜味美、保健药用价值高等特点.近 年来,青海省不断加大对黑枸杞的人工栽培技术投资和实验性驯化种植,并取得 了很好的生态、社会和经济效益,但黑枸杞产业化生产仍存在许多问题.下图为 青海省年平均日照时数和年平均降水量空间分布图.
地 理试题
本试卷分为第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。满分 100 分,考 试时间 90 分钟。
第Ⅰ卷(选择题,共 60 分) 一、单项选择题(每题只有一个正确答案,共 30 题,每小题 2 分,共 60 分。)
阅读下面两幅人口统计图,回答 1~2 题。
1.对图甲中 A、B、C 三国的分析正确的是
不利:
(2)(4 分)吸引相关产业转入,促进河南产业结构调整和产业升 级,加快河南的工业化进程(1 分);增加就业机会,提高收入(1 分);城镇规模 扩大; 城市人口增加(1 分);城市化水平不断提高。(1 分)
32. (11 分)(1).

2020年河南省洛阳市孟津二高高二数学理下学期期末试卷含解析

2020年河南省洛阳市孟津二高高二数学理下学期期末试卷含解析

2020年河南省洛阳市孟津二高高二数学理下学期期末试卷含解析一、选择题:本大题共10小题,每小题5分,共50分。

在每小题给出的四个选项中,只有是一个符合题目要求的1. 在右图的正方体中,棱BC与平面ABC1D1所成的角为()A.30° B.45° C.90° D. 6 0°参考答案:B2. 已知函数f(x)的导函数为f′(x),且满足f(x)=2xf′(1)+lnx,则f′(1)=()A.﹣e B.﹣1 C.1 D.e参考答案:B【考点】导数的乘法与除法法则;导数的加法与减法法则.【分析】已知函数f(x)的导函数为f′(x),利用求导公式对f(x)进行求导,再把x=1代入,即可求解;【解答】解:∵函数f(x)的导函数为f′(x),且满足f(x)=2xf′(1)+ln x,(x >0)∴f′(x)=2f′(1)+,把x=1代入f′(x)可得f′(1)=2f′(1)+1,解得f′(1)=﹣1,故选B;【点评】此题主要考查导数的加法与减法的法则,解决此题的关键是对f(x)进行正确求导,把f′(1)看成一个常数,就比较简单了;3. 若椭圆的焦点在x轴上,且离心率e=,则m的值为()A.B.2 C.﹣D.±参考答案:B【考点】椭圆的简单性质.【分析】通过椭圆的焦点在x轴上,利用离心率,求出m的值.【解答】解:因为椭圆的焦点在x轴上,且离心率e=,所以,解得m=2.故选B.【点评】本题考查椭圆的简单性质的应用,离心率的求法,考查计算能力.4. 用反证法证明命题“同一平面内,不重合的两条直线,都和直线垂直,则与平行”时,否定结论的假设应为()A. 与垂直B. 与是异面直线C. 与不垂直D.与相交参考答案:D5. 已知函数,若,则函数在定义域内( )A.有最小值,但无最大值. B.有最大值,但无最小值.C.既有最大值,又有最小值. D.既无最大值,又无最小值.参考答案:A6. 右图是2011年在某大学自主招生面试环节中,七位评委为某考生打出的分数的茎叶统计图,去掉一个最高分和一个最低分后,所剩数据的平均数和方差分别为()A、84,4.84B、84,1.6C、85,1.6D、85,1.5参考答案:C7. 已知集合,,则A∪B=A. {1}B. {1,2}C. {0,1,2,3}D. {-1,0,1,2,3}参考答案:C试题分析:集合,而,所以,故选C.【名师点睛】集合的交、并、补运算问题,应先把集合化简再计算,常常借助数轴或韦恩图进行处理.8. 在正方体ABCD﹣A1B1C1D1中,直线AB1与平面ABC1D1所成的角的正弦值为()A.B.C.D.参考答案:D【考点】直线与平面所成的角.【分析】如图所示,建立空间直角坐标系.不妨时AB=1,取平面ABC1D1的法向量==(1,0,1),则直线AB1与平面ABC1D1所成的角的正弦值=|cos<,>|=,即可得出.【解答】解:如图所示,建立空间直角坐标系.不妨时AB=1,则D(0,0,0),A(1,0,0),B1(1,1,1),A1(1,0,1).则=(0,1,1),取平面ABC1D1的法向量==(1,0,1),则直线AB1与平面ABC1D1所成的角的正弦值=|cos<,>|===.故选:D.【点评】本题考查了空间位置关系、法向量的应用、线面角、向量夹角公式,考查了推理能力与计算能力,属于中档题.9. 在中,面积,则A、 B、75 C、55 D、49参考答案:C10. 已知函数,则“”是“为偶函数”的()A. 必要不充分条件B. 充分不必要条件C. 充要条件D. 既不充分也不必要条件参考答案:B【分析】根据充分条件与必要条件的定义,结合函数奇偶性的定义和性质,进行判断即可.【详解】若,则为偶函数;当,时,为偶函数,但不成立;所以“”是“为偶函数”的充分不必要条件.故选B【点睛】本题主要考查充分条件与必要条件的判断,熟记定义即可,属于基础题型. 二、填空题:本大题共7小题,每小题4分,共28分11. 若关于x的方程x+b=恰有一个解,则实数b的取值范围为.参考答案:[﹣2,0)∪{﹣1}考点:根的存在性及根的个数判断.专题:计算题;函数的性质及应用.分析:方程x+b=解的个数即函数y=x+b与y=的交点的个数,作图求解.解答:解:方程x+b=解的个数即函数y=x+b与y=的交点的个数,作函数y=x+b与y=的图象如下,由图可知,直线在y=x的右侧或直线与半圆相切,故实数b的取值范围为[﹣2,0)∪{﹣1}.故答案为:[﹣2,0)∪{﹣1}.点评:本题考查了方程的根与函数的图象的关系,属于基础题12. ①若椭圆+=1的左右焦点分别为F1、F2,动点P满足|PF1|+|PF2|>10,则动点P 不一定在该椭圆外部;②椭圆+=1(a>b>0)的离心率e=,则b=c(c为半焦距);③双曲线﹣=1与椭圆+y2=1有相同的焦点;④抛物线y2=4x上动点P到其焦点的距离的最小值为1.其中真命题的序号为.参考答案:②③④【考点】命题的真假判断与应用.【分析】根据点与椭圆的位置关系,可判断①;根据离心率,求出b,c关系,可判断②;求出椭圆和双曲线的焦点,可判断③;求出抛物线上点到焦点的最小距离,可判断④【解答】解:①若椭圆+=1的左右焦点分别为F1、F2,动点P满足|PF1|+|PF2|>10,则动点P一定在该椭圆外部,故错误;②椭圆+=1(a>b>0)的离心率e=,则b=c=a(c为半焦距),正确;③双曲线﹣=1与椭圆+y2=1有相同的焦点(,0),正确;④抛物线y2=4x上动点P到其焦点的距离的最小值为=1,正确.故答案为:②③④.13. 已知都是正实数, 函数的图象过点,则的最小值是_ __.参考答案:14. 若以原点为圆心,椭圆的焦半径c为半径的圆与该椭圆有四个交点,则该椭圆的离心率的取值范围为:.参考答案:(,1)【考点】椭圆的简单性质.【专题】分析法;不等式的解法及应用;圆锥曲线的定义、性质与方程.【分析】设椭圆的方程为+=1(a>b>0),与圆方程为x2+y2=c2,联立方程组,解得x,y,由题意可得c>b,再由离心率公式,计算即可得到所求范围.【解答】解:设椭圆的方程为+=1(a>b>0),以原点为圆心,椭圆的焦半径c为半径的圆方程为x2+y2=c2,联立两方程,可得y2=,x2=,由题意可得x2>0,y2>0,结合a>b>0,a>c>0,可得c2>b2,即有c2>a2﹣c2,即为a<c,则离心率e=>,由0<e<1,可得<e<1.故答案为:(,1).【点评】本题考查椭圆的离心率的范围,注意运用圆与椭圆方程联立,通过方程组有解,考查运算能力,属于中档题.15. 某地区对两所高中学校进行学生体质状况抽测,甲校有学生600人,乙校有学生700人,现用分层抽样的方法在这1300名学生中抽取一个样本.已知在甲校抽取了42人,则在乙校应抽取学生人数为.参考答案:49【考点】B3:分层抽样方法.【分析】根据分层抽样原理,列方程计算乙校应抽取学生人数即可.【解答】解:甲校有学生600人,乙校有学生700人,设乙校应抽取学生人数为x,则x:42=700:600,解得x=49,故在乙校应抽取学生人数为49.故答案为:49.16. .参考答案:略17. 如图,在正方体ABCD﹣A′B′C′D′中,异面直线AC与BC′所成的角为.参考答案:60°【考点】异面直线及其所成的角.【专题】计算题;转化思想;综合法;空间角.【分析】连结A′B、A′C′,由AC∥A′C′,得∠A′C′B是异面直线AC与BC′所成的角,由此能求出异面直线AC与BC′所成的角.【解答】解:在正方体ABCD﹣A′B′C′D′中,连结A′B、A′C′,∵AC∥A′C′,∴∠A′C′B是异面直线AC与BC′所成的角,∵A′B=BC′=A′C′,∴∠A′C′B=60°,∴异面直线AC与BC′所成的角为60°.故答案为:60°.【点评】本题考查异面直线所成角的求法,是基础题,解题时要认真审题,注意空间思维能力的培养.三、解答题:本大题共5小题,共72分。

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考英语试卷 无听力试题

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考英语试卷 无听力试题

英语试卷第二部分阅读理解(共两节,满分40分)AWhether they are already household names or a hidden figure deserving of more recognition, the following ladies changed the world with their enormous contributions.Ali StrokerAli Stroker took the theater world — and, indeed, the very Internet — by storm when, on June 9, 2019, she became the first performer in a wheelchair to take home a Tony Award. After becoming the first actor in a wheelchair in Broadway history in 2015, she won the award for her powerhouse performance in the revival of Oklahoma \Junko TabeiTwenty-two years after the first-ever successful mission to the top of Mount Everest, Japanese mountaineer Junko Tabei became the first woman to reach the peak. She led a team of 15 women, accompanied by six Sherpas (夏尔巴人),and reached the summit with one of the Sherpas on May 16, 1975.Gertrude EderleThe Queen of Waves, who also happened to be deaf, was the first woman to swim across the English Channel. Fighting through cold temperatures and strong tides that change direction every six hours for 22 miles, she clocked a time of 14 hours and 34 minutes. Virginia Apgar Generations of parents owe this American doctor a huge thank you, as she developed the Apgar Score, the first standardized system of tests to assess if newborn babies were healthy once they made their way from womb to world. Apgar, who was a gifted cellist and violinist in her spare time, also happens to hold the title of the first woman to be hired as a full professor at the medical school at Columbia University.21. Whose story may inspire the disabled?A. Stroker and Tabei.B. Stroker and Ederle.C. Ederle and Apgar.D. Ederle and Tabei.22. Why should Apgar be appreciated by parents?A. She took home a big award.B. She saved many babies' lives.C. She developed the Apgar Score.D. She became the first full professor.23. Who won the title of the Queen of Waves?A. Ali Stroker.B. Junko Tabei.C. Virginia Apgar.D.Gertrude Ederle.BMy students were taking midterms when my phone erupted with urgent messages. " A student is having a panic attack," texted a teaching assistant. I ran out of my office, down a flight of stairs and found the student —a pupil in my 350-person organic chemistry class —lying motionless on the ground outside the exam hall. " Did my exam really trigger a panic attack?" I asked myself. "Why am I not prepared to deal with a situation like this?”It was my first time teaching the course. But I knew that the subject was challenging for my students. This was a source of stress for premedical students in particular, who feared that a low grade in organic chemistry would keep them from getting into medical school.The following day, I was scheduled to lecture to the same class. I knew that I had to address what had happened during the midterm. So, I started by saying: "I want to take some time today to talk about something important. How many of you think that this is a weed-out course?" Half of my students raised their hands carefully. "I'm sorry to hear that,” I continued. "I want you all to know that I do not consider any of you to be weeds; you all deserve to be here. ”I flashed a slide of flowers in various shapes. I smiled at my students and said: "I think of you as flowers —different flowers with different needs. You may not bloom at the same time, but you will bloom! You may not do well in the midterm exam, but you will learn from your mistakes and do better in the final exam. I believe this. I believe in you."From that point on, my office hours were packed. Some asked about lecture topics and study strategies; others opened up about personal issues.I was amazed that a simple, frank discussion in lecture could make such a difference.24. What made the pupil have a panic attack?A. Hiding personal issues.B. The stress for high grades.C. Lacking study strategies.D. Failing to handle the situation.25. What does the underlined word "trigger" in Paragraph 1 most probably mean?A. Cure.B. Prevent.C. Frighten.D. Cause.26. Why did the author go to the same class the next day?A. To give the lesson according to the arrangement.B. To apologize and explain to the panicked student.C. To give a speech on what happened in the test.D. To persuade all the students to stay in the class.27. Which paragraph mainly shows the author's encouragement to students?A. Paragraph 2.B. Paragraph 3.C. Paragraph 4.D. Paragraph5.CThe cognitive health and development of boys may be affected by their mothers ' body mass index ( BMI) (体重指数)while pregnant with them, according to research from Columbia University and the University of Texas at Austin.The study, which was published in the journal BMC Pediatrics on Friday, observed 368 subjects from low-income African American and Dominican women during the second half of their pregnancies, and then evaluated their children three and seven years later. Researchers found that the sons of women whose BMIs indicated that they were overweight or obese when they became pregnant were more likely to show less developed athletic skills as 3-year-olds and lower intelligence as 7-year-olds compared to boys whose mothers were at "normal" weights during pregnancy.Among boys, the study found, mothers' overweight and obesity connected with IQ scores between 4.6 and almost 9 points lower thanthose of boys whose mothers' weights were in the "normal" range before pregnancy. Researchers did not observe the same phenomenon among daughters whose mothers had been obese."These findings aren't meant to shame or scare anyone, "Elizabeth Widen, assistant professor of nutritional sciences at UT Austin and one of the study's co-authors, said in a press release. " We are just beginning to understand some of these interactions between mothers' weight and the health of their babies."Why mothers' obesity appeared to affect childhood IQ was unclear, but earlier research has suggested that there is a relationship between a mother's diet and her child's later IQ, according to Columbia University. Researchers did not control for what the mothers ate, the press release noted.The study's authors wrote that because childhood IQ has been shown to be an indicator of later success in life, studying how a mother's obesity could affect the IQ of her child is worthwhile.28. How did researchers carry out the study?A. By measuring mothers' body mass index.B. By watching mothers and babies for years.C. By comparing 3-year-old babies with 7-year-olds.D. By evaluating the health of mothers and their babies.29. What's the main purpose of the study?A. To show links between mothers' weight and babies' IQ.B. To make those overweight mothers shameful and scared.C. To warn some fat mothers to keep a balanced diet.D. To persuade more obese mothers to lose weight.30. What do the researchers think of the study?A. Doubtful.B. Worrying.C. Significant.D. Interesting.31. In which section of a newspaper may the text appear?A. Entertainment.B. Novel.C. Education.D. Health.DMore than half of the birds in Washington are at risk of extinction because of climate change. That's according to a new national report fromthe Audubon Society, which gives detailed analysis of climate effects on about 600 species of North American birds.It's based on more than 140 million observations of birds across the US, Mexico and Canada. Audubon scientists looked at the likely effects of sea-level rise, urbanization, drought, extreme spring heat, increased fires, heavy rain and other factors.But it doesn't just spell out a doomsday scenario (世界末日).Instead, it offers a range of effects and warming, depending on how much carbon humans add to the atmosphere."It is truly an existential threat (威胁),not only to birds but to people,” said Doug Santoni, board chair of Audubon Washington, who looked into the report as soon as it came out.Santoni says he was struck to see the vulnerability (脆弱)of a common “ backyard bird" , the dark-eyed junco. It's one that many first-time birders become familiar with as they learn how to identify species based on their markings and other traits. Currently in Washington, you can count on juncos to show up at your feeder, year round. Extreme spring heat, increased fires and heavy rain are the kinds of changes that will force birds like these north, or kill them off if they fail to adapt.Trina Baya rd, director of bird conservation at Audubon’s Washington chapter, says, "It's certainly a very serious warning report," but adds that there’s still hope. “If we can stabilize current temperatures and decrease our emissions (排放),we can really reduce the effects to these birds --- that's very motivating. ”32. What can we know about the new report?A. It analyses the species of birds in detail.B. It's issued by watching 600 bird species.C. It shows the end of North American birds.D. It reports the threat some birds are facing.33. What may Santoni probably agree with?A. Climate change is a threat only to birds.B. It's too late to take action to save the birds.C. The current situation of the birds is worrying.D. It's common that birds are affected by climate change.34. Which of the following can help these birds according to Trina?A. Lowering present temperatures.B. Reducing our daily emissions.C. Making them adapt to climate change.D. Encouraging people to protect them.35. What can be the best title for the text?A. Climate change threatens many Washington bird speciesB. A new report about 600 species of North American birdsC. Different attitudes towards the situation of bird speciesD. Climate change makes different kinds of species at risk第二节(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考化学试卷(无答案)

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考化学试卷(无答案)

化学试题班级_______ 考号______ 姓名_______第I卷选择题(共50分)一、选择题(每小题2分,共20分)1.对于可逆反应3H2+N22NH3,下列措施能使反应物中活化分子百分数、化学反应速率和化学平衡常数都变化的是( )A.增大压强B.充入更多N2C.使用高效催化剂D.降低温度2.一定条件下,反应2A(g)+2B(g)3C(g)+D(g)在容积不变的密闭容器中进行,达到化学平衡状态的标志是( )A.单位时间内生成2n mol B,同时消耗3n mol C B.容器内压强不随时间变化C.混合气体的密度不随时间变化 D.单位时间内生成2n mol A,同时生成n mol D3.一定条件下的密闭容器中,反应3H2(g)+3CO(g)CH3OCH3(g)+CO2(g) ΔH<0达到平衡,要提高CO的转化率,可以采取的措施是( )A.升高温度B.加入催化剂C.减小CO2的浓度D.增加CO的浓度4.下列有关说法中正确的是( )A.2CaCO3(s)+2SO2(g)+O2(g)===2CaSO4(s)+2CO2(g)在低温下能自发进行,则该反应的ΔH<0B.NH4Cl(s)===NH3(g)+HCl(g)在室温下不能自发进行,则该反应的ΔH<0C.若ΔH>0,ΔS<0,化学反应在任何温度下都能自发进行D.加入合适的催化剂能降低反应活化能,从而改变反应的焓变5.以下对影响反应方向因素的判断不正确的是()A.有时焓变对反应的方向起决定性作用B.有时熵变对反应的方向起决定性作用C.焓变和熵变是判断反应方向的两个主要因素D.任何情况下,温度都不可能对反应的方向起决定性作用6. 298 K时,在2 L固定体积的密闭容器中,发生可逆反应:2NO2(g)N2O4(g) ΔH=-a kJ/mol(a>0)。

N2O4的物质的量浓度随时间变化如图。

达平衡时,N2O4的浓度为NO2的2倍,若反应在398 K进行,某时刻测得n(NO2)=0.6 mol,n(N2O4)=1.2 mol,则此时下列关系正确的是( )A.v(正)>v(逆) B.v(正)<v(逆)C.v(正)=v(逆) D.v(正)、v(逆)大小关系不确定7.已知反应I2(g)+H2(g)2HI(g)ΔH<0,下列说法正确的是()A.降低温度,正向反应速率减小倍数大于逆向反应速率减小倍数B.升高温度将缩短达到平衡的时间C.达到平衡后,保持温度和容积不变,充入氩气,正逆反应速率同等倍数增大D.达到平衡后,保持温度和压强不变,充入氩气,HI的质量将减小8.反应2SO2+O22SO3经一段时间后,SO3的浓度增加了0.8 mol·L-1,在这段时间内用O2表示的反应速率为0.04 mol·L-1·s-1,则这段时间为()。

河南省洛阳市轴第二中学2020-2021学年高二数学理模拟试卷含解析

河南省洛阳市轴第二中学2020-2021学年高二数学理模拟试卷含解析

河南省洛阳市轴第二中学2020-2021学年高二数学理模拟试卷含解析一、选择题:本大题共10小题,每小题5分,共50分。

在每小题给出的四个选项中,只有是一个符合题目要求的1. 过所在平面外一点,作,垂足为,连接。

若则点()A.垂心B. 外心C.内心D. 重心参考答案:B2. 圆的切线方程中有一个是()A.x-y=0 B.x+y=0 C.x=0 D.y=0参考答案:C略3. 在等差数列{a n}中,若a4+a6+a8+a10+a12=120,则2a10-a12=()A.24 B.22 C.20D.18参考答案:A4. 已知函数,其导函数的图象如图所示,则()A.在上为减函数B.在处取极小值C.在上为减函数D.在处取极大值参考答案:C略5. 设满足约束条件,则的取值范围是()A. B. C. D.参考答案:D略6. 在中,,则最短边的边长等于()第1页共4页第2页共4页共A. B. C. D.参考答案:B7. 如图,长方形的四个顶点为,曲线经过点.现将一质点随机投入长方形中,则质点落在图中阴影区域的概率是()A. B. C. D.参考答案:D8. 在中,,则()A. B. C. D.参考答案:A9. 焦距为,离心率,焦点在轴上的椭圆标准方程是()参考答案:D10. 某公司在甲、乙、丙、丁四个地区分别有150个、120个、180个、150个销售点,公司为了调查产品销售的情况,需从这600个销售点中抽取一个容量为100的样本,记这项调查为(1);在丙地区中有20个特大型销售点,要从中抽取7个调查其销售收入和售后服务情况,记这项调查为(2)。

则完成(1)、(2)这两项调查宜采用的抽样方法依次是 ( )A、分层抽样法,系统抽样法B、分层抽样法,简单随机抽样法C、系统抽样法,分层抽样法D、简单随机抽样法,分层抽样法参考答案:B略二、填空题:本大题共7小题,每小题4分,共28分11. 对取某给定的值,用秦九韶算法设计求多项式的值时,应先将此多项式变形为参考答案:略12. 在等差数列中已知,a7=8,则a1=_______________参考答案:D略13. 如图,在梯形中,,点在的内部(含边界)运动,则的取值范围是.参考答案:14. 已知抛物线的焦点为,抛物线的准线与轴的交点为,点A在抛物线上且,则的面积是.参考答案:8略15. 除以的余数是____.参考答案:116. 利用数学归纳法证明不等式1+++…+<f(n)(n≥2,n∈N*)的过程中,由n=k变到n=k+1时,左边增加的项是.参考答案:【考点】RG:数学归纳法.【分析】依题意,由n=k+1时,不等式左边为1+++…++,与n=k时不等式的左边比较即可得到答案.【解答】解:用数学归纳法证明等式1+++…+<f(n)(n≥2,n∈N*)的过程中,假设n=k时不等式成立,左边=1+++…+,则当n=k+1时,左边=1+++…++,∴由n=k递推到n=k+1时不等式左边增加了:,故答案为:.17. 已知复数z=x+yi(x,y∈R,x≠0)且|z﹣2|=,则的范围为.参考答案:考点:复数求模.专题:计算题.分析:利用复数的运算法则和模的计算公式、直线与圆有公共点的充要条件即可得出.解答:解:∵|z﹣2|=|x﹣2+yi|,,∴.∴(x﹣2)2+y2=3.设,则y=kx.联立,化为(1+k2)x2﹣4x+1=0.∵直线y=kx与圆有公共点,∴△=16﹣4(1+k2)≥0,解得.∴则的范围为.故答案为.点评:熟练掌握复数的运算法则和模的计算公式、直线与圆有公共点的充要条件是解题的关键.三、解答题:本大题共5小题,共72分。

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考数学试卷

河南省洛阳市孟津县第二高级中学2020-2021学年高二9月月考数学试卷

绝密★启用前数学试题注意事项:1、答题前填写好自己的姓名、班级、考号等信息 2、请将答案正确填写在答题卡上一、选择题(每小题5分,共60分)。

1.在△ABC 中,若a = 2 ,b =,030A = , 则B 等于( ) A .60 B .60或 120 C .30 D .30或150 2.在数列55,34,21,,8,5,3,2,1,1x 中,x 等于( )A .11B .12C .13D .143.等差数列{}n a 的前n 项和为S n ,若a 3+a 17=10,则S 19= ( ) A .55 B .95 C .100 D .不能确定 4.若∆ABC 中,sin A :sin B :sin C =2:3:4,那么cos C =( ) A. 14-B. 14C.23-D.235.设n S 为等差数列n a {}的前n 项和,132s 4a a 2==-,,则9a =( )A .6/5 B.16/5 C.32/5 D.26.等差数列{}n a 的前m 项和为30,前2m 项和为100,则它的前 3m 项和是( )A.130B.170C.210D.2607. 数列n a {}是首项为2,公差为3的等差数列,数列{}n b 是首项为-2,公差为4的等差数列。

若n n a b =,则n 的值为( ) A.4 B.5 C.6 D.78.在△ABC 中,060,2||,1||===B BC AB ,则||AC 的值是( ) A. 2 B. 3 C.325- D.39.等差数列{}n a 中,a 1>0,d ≠0,S 3=S 11,则S n 中的最大值是 ( ) A .S 7 B .S 7或S 8 C .S 14 D .S 8 10.等差数列{a n }和{b n }的前n 项和分别为S n 和T n ,且132+=n nT S nn,则55b a =( ) A. 32 B.149 C. 3120 D. 9711.已知A 、B 、C 是△ABC 的三个内角,且sin 2cos sin A B C =,则( ) A . B =C B . B >C C . B <C D . B ,C 的大小与A 的值有关 12.给出下列三个命题(1)若tan A tan B >1,则△ABC 一定是钝角三角形; (2)若sin 2A +sin 2B =sin 2C ,则△ABC 一定是直角三角形; (3)若cos(A -B )cos(B -C )cos(C -A )=1,则△ABC 一定是等边三角形.以上正确命题的个数有( )A .0B .1C .2D .3 二.填空题。

河南省洛阳市孟津县第二高级中学2021年高二英语9月周练试题

河南省洛阳市孟津县第二高级中学2021年高二英语9月周练试题

河南省洛阳市孟津县第二高级中学2020-2021学年高二英语9月周练试题本试卷共12页,全卷满分150分,考试用时120分钟﹡祝考试顺利﹡注意事项:1.答题前,先将自己的姓名、准考证号填写在试题和答题卡上,并将准考证号条形码粘贴在答题卡上的指定位置。

用2B铅笔将答题卡上试卷类型A后的方框涂黑。

2.选择题作答:每小题选出答案后,用2B铅笔将答题卡上对应题目的答案标号涂黑。

写在试题卷、演草纸和答题卡上的非答题区域均无效。

3.非选择题的作答:用签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、演草纸和答题卡上的非答题区域均无效。

4.考试结束后,请将本试卷和答题卡一并上交。

第一部分听力(共两节,满分20分)做题时,先将答案标在试卷上。

录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。

每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1. What does the man advice woman to do?A. Continue looking for the dogB. Give up looking for the dogC. Adopt another dog2. What do you think the speakers will buy for Steve most probably?A. A grey suitB. A pair of green shoesC. A black suit3. Why does the man think Susan might have taken the book?A. He saw her take itB. She likes reading booksC. He’s watching TV4. Who made the Mother’s Day card?A. The manB. The sellerC. The woman5. Where did the man use to work?A. In a schoolB. At a restaurantC. At a store第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。

  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

的取值范围.
22.(本小题满分 12 分)已知椭圆的中心在坐标原点 O,长轴长为 2
2 ,离心率 e=
2

2
过右焦点 F 的直线 l 交椭圆于 P、Q 两点. (Ⅰ)求椭圆的方程; (Ⅱ)若 OP、OQ 为邻边的平行四边形是矩形,求满足该条件的直线 l 的方程.
参考答案
一、选择题:本大题 12 个小题,每小题 5 分,共 60 分
有一项是符合题目要求的.)
1.等差数列{ an }中, a3 =2, a5 =7,则 a7 =
A.10
B.20
C.16
D.12
2.设集合 A={x|0<x<1},B={x|0<x<3},那么“m∈A”是“m∈B”的
A.充分不必要条件
B.必要不充分条件
C.充要条件
D.既不充分也不必要条件
3.已知△ABC 的周长为 20,且顶点 B(0,-4),C(0,4),则顶点 A 的轨迹方程是
则 a 2 4 0 ;即 2 a 2 .……………………………………3 分
函数 y loga x ,( a 0且a 1)为则增函数,
所以 a 1 .
…………………………6 分
a 2或a 2,
因为
p

q
真,所以
a
1,
………………………8 分
a 2.
…………………………10 分
B.等腰三角形
C.等腰或直角三角形
D.钝角三角形
10.设定点
M(3,
10 3
)与抛物线
y2
=2x
上的点
P
的距离为
d1
,P
到抛物线准线
l
的距为
d2 ,则 d1 + d2 取最小值时,P 点的坐标为
A.(0,0)
B.(1, 2 )
C.(2,2)
11
D.( ,- )
82
11.已知
F1

F2
是椭圆
x2 a2
2AB AC
5 ,………………………….8 分
于是 sin A
1 cos2 A =
5
,…………………………………10 分
5
从而 S ABC
1 2
AB AC sin
A 3.………………………………12 分
19.解:设矩形温室的左侧边长为 a m,后侧边长为 b m,则 ab=800 m2 .
2n 1 3n
0,
Tn T1 1 . 若Tn. 2a 1 恒成立,则 1 2a 1 , a 1. ……………12

22.解:(1)由已知,椭圆方程可设为 x2 y2 1a b 0.
a2 b2
∵长轴长为 2 2 ,离心率 e
2

即 2a 2 2,
e c
2
.
2
a2
∴ a 2, b c 1 .所求椭圆方程为 x2 y2 1 . 2
E→F P→B ∴〈 , 〉 = 90°,异面直线 EF 和 PB 所成角的大小为 90°,……7 分
B→C
E→F
(2)证明:由(1)知 EF⊥PB,又∵ =(0,2,0), =(1,0,1),
E→F B→C ∴ · =0,
∴EF⊥BC.
…………………………………10 分
∴ 又 EF⊂平面 PCE, ∴平面 PCE⊥平面 PBC.………………………12 分
.
因为以 OP, OQ 为邻边的平行四边形是矩形,所以 OP OQ ,
所以. OP OQ 0 .
由 OP OQ
x1 x2
y1 y2
2k 2 2 k 2 1 2k 2 1 2k 2
0,
得 k 2 2 , k 2 . …………………………………………10 分 所求直线的方程为 y 2(x 1) . ………………1 2 分
18.(本小题满分 12 分)在△ABC 中,BC= 5 ,AC=3,sinC=2sinA.
(Ⅰ)求边长 AB 的值; (Ⅱ)求△ABC 的面积.
19.(本小题满分 12 分)某公园计划建造一个室内面积为 800m2 的矩形花卉温室.在温室内, 沿左、右两侧与后侧内墙各保留 1m 宽的通道。沿前侧内墙保留 3m 宽的空地,中间矩形
则花卉的种植面积为 S (a 4)(b 2) ab 4b 2a 8 808 2(a 2b).…………4

所以 S 808 4 2ab 648(m2 ). …………8 分
当且仅当 a 2b,即a时 40(m),b 20(m) , S最大值 648(m2 ).……11 分
y2 +=
b2
1(a>b>0)的两个焦点,以线段 F1 F2 为边作正三角形
M F1 F2 ,若边 M F1 的中点在椭圆上,则椭圆的离心率是
3-1
A.
2
B. 3-1
3+1
C.
2
D. 3+1
12.空间直角坐标系中,O 为坐标原点,已知两点坐标为 A(3,1,0),B(-1,3,0),若
点 C 满足 OC = OA + OB ,其中 , ∈R, + =1,则点 C 的轨迹为
3n

2 3
Tn
1
2 3
2 32
2 3n1
2n 1 3n
1
2
1 3
[1 ( 1
1 ) n 1 3 1
]
2n 3n
1
2
(
1 3
)n1
2n 1 3n
.
…………8

3
所以 Tn
3
1 2 3n2
2n 1 2 3n1
3
n 1
.
3n1
………………………………9 分
Tn1
Tn
3
n2 3n
3
n 1 3n1
}中,若 a3a5a7a9a11=243 ,则
a92 a11
的值为
A.9
B.1
C.2
D.3
6.三角形两条边长分别为 2 和 3,其夹角的余弦值是方程 2 x2 -3x+1=0 的根,则此三角
形周长为
A. 7
B. 7
C.5+ 7
D.5+2 3
x 2, 7.若实数 x、y 满足 y 3, 则 S=2x+y-1 的最大值为
18.(1)解:在 ABC 中,根据正弦定理, AB BC , sin C sin A .......2分
于是 AB sin C BC 2BC 2 5
sin A
.............................5 分
(2)解:在 ABC 中,根据余弦定理,
得 cos A AB 2 AC 2 BC 2 2 5
河南省洛阳市孟津县第二高级中学 2020-2021 学年高二数学 9 月周练
试题
注意事项: 本试卷分第 I 卷(选择题)和第Ⅱ卷(非选择题)两部分。考试时间 120 分钟,满分
150 分。考生应首先阅读答题卡上的文字信息,然后在答题卡上作答,在试题卷上作答无效。 交卷时只交答题卡。
第Ⅰ卷 一、选择题:(本大题 12 个小题,每小题 5 分,共 60 分.在每小题给出的四个选项中,只
∴由求根公式可得: x1,2
2k 2 2k 2 1 2k 2
2
.
x1
x2
4k 2 1 2k 2
,
x1x2
2k 2 2 1 2k 2
.……………………7

y1 k(x1 1) , y2 k(x2 1) .
y1 y2
k 2 (x1
1)( x2
1)
k 2[x1x2
(x1
x2 ) 1]
k 2 1 2k 2
答:当矩形温室的左侧边长为 40m,后侧边长为 20m 时,花卉种植面积达到最大,最大面积
为 648 m2 ……………………………………………………………12 分
20.(12 分)解: 以直线 AB 为 x 轴, 直线 AD 为 y 轴, 直线
AP 为 z,轴建立空间直角坐标系,
如右图,则 A(0,0,0),
A.平面
B.直线
C.圆
D.线段
第Ⅱ卷 二、填空题:(本大题共 4 个小题,每小题 5 分,共 20 分.将答案填在答题卡上相应位置)
13.数列{ an }的通项公式为 an =2n-9,n∈N﹡,当前 n 项和 Sn 达到最小时,n 等于
_________________.
x2 y2 14.若双曲线 -=
B(2,0,0),C(2,2,0),D(0,2,0),
P(0,0,2).…………………………2 分
(1)∵E 为 AD 的中点, ∴E(0,1,0), 又 F 为 PC 的中点,
∴ F(1,1,1).∴E→F=(1,0,1).又P→B=(2,0,-2),
E→F P→B ∴cos〈 , 〉=0,…………5 分
则数列bn是首项为 1,公差为 2 的等差数列.则 bn 1 (n 1) 2 2n 1. ………5

(Ⅱ)因为 cn
bn an
2n 1 3n1 ,所以 Tn
1 30
3 31
5 32
2n 1
.
3n1

1 3 Tn
两式相减得:
1 31
3 32
5 32
2n 3 3n1
2n 1
,………………………7
………… 4 分
(2)当直线 l 与 x 轴垂直时,直线 l 的方程为 x 1 ,此时 POQ 小于 90 , OP, OQ 为
邻边的平行四边形不可能是矩形.
……………5 分
当直线 l 与 x 轴不垂直时,设直线 l 的方程为 y k x 1.
相关文档
最新文档