北京市101中学2018届高三数学3月月考试题文

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北京市一零一中学2020届高三3月月考语文试卷(含答案)

北京市一零一中学2020届高三3月月考语文试卷(含答案)

北京101中学2018届下学期高三年级3月月考语文试卷本试卷共150分。

考试时间150分钟。

一、本大题共7小题,共24分。

阅读下面的文字,完成1~7题。

材料一艺术品的接受在过去并不被看作是重要的美学问题,20世纪解释学兴起,一个名为“接受美学”的美学分支应运而生,于是研究艺术品的接受成为艺术美学中的显学。

过去,通常只是从艺术品的立场出发,将创作看作艺术家审美经验的结晶过程,作品完成就意味着创作完成。

而从接受美学的角度来看,这一完成并不说明创作已经终结,它只说明创作的第一阶段告一段落,接下来是读者或观众、听众的再创作。

由于未被阅读的作品的价值包括审美价值仅仅是一种可能的存在,只有通过阅读,它才转化为现实的存在,因此对作品的接受具有艺术本体的意义,也就是说,接受者也是艺术创作的主体之一。

艺术文本即作品对于接受者来说具有什么意义呢?接受美学的创始人、德国的伊瑟尔说艺术文本是一个“【甲】召.唤结构”,因为文本有“空白”“空缺”“否定”三个要素。

所谓“空白”是说它有一些东西没有表达出来,作者有意不写或不明写,要接受者用自己的生活经验与想象去补充;所谓“空缺”,是语言结构造成的各个图像间的空白,接受者在阅读文本时要把一个个句子表现的图像片断连接起来,整合成一个有机的图像系统;所谓“否定”指文本对接受者生活的现实具有否定的功能,它能引导接受者对现实进行反思和批判。

由此可见,文本的召唤性需要接受者呼应和配合,完成艺术品的第二次创作。

正如中国古典美学中的含蓄与【乙】简jié,其有限的文字常常引发出读者脑海中的丰富意象。

接受者作为主体,他对文本的接受不是被动的。

海德格尔提出“前理解”,即理解前的心理文化结构,这种结构影响着理解。

理解不可能是文本意义的重现,而只能是文本与“前理解”的统一。

这样,文本与接受就呈现出一种相互作用的关系:一方面文本在相当程度上规定了接受者理解的范围、方向,让理解朝它的本义靠拢;另一方面,文本不可能将接受者完全制约住、规范住,接受者必然会按照自己的方式去理解作品,于是不可避免地就会出现误读或创造,从某种意义上说,理解就是误读,创造也是误读,不要希望所有的接受者都持同样的理解,也不要希望所有的理解都与艺术家的本旨一致,那样并不意味着艺术作品的成功。

2016届高三上学期第一次月考数学(文)试题Word版含答案

2016届高三上学期第一次月考数学(文)试题Word版含答案

2016届高三上学期第一次月考数学(文)试题Word版含答案2016届高三上学期第一次月考数学文试卷考试时间120分钟,满分150分一、选择题:本大题共12小题,每小题5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.设集合M ={x |x ≥0,x ∈R },N ={x |x 2<1,x ∈R },则M ∩N 等于( ) A .[0,1] B .[0,1) C .(0,1]D .(0,1)2.已知集合A ={1,2},B ={1,a ,b },则“a =2”是“A ?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.已知命题p :所有有理数都是实数;命题q :正数的对数都是负数,则下列命题中为真命题的是( ) A .﹁p 或q B .p 且q C .﹁p 且﹁qD .﹁p 或﹁q4.设函数f (x )=x 2+1,x ≤1,2x ,x >1,则f (f (3))等于( )A.15B .3C.23D.1395.函数f (x )=log 12(x 2-4)的单调递增区间是( )A .(0,+∞)B .(-∞,0)C .(2,+∞)D .(-∞,-2)6.已知函数f (x )为奇函数,且当x >0时,f (x )=x 2+1x ,则f (-1)等于( )A .-2B .0C .1D .27. 如果函数f (x )=x 2-ax -3在区间(-∞,4]上单调递减,则实数a 满足的条件是( ) A .a ≥8 B .a ≤8 C .a ≥4D .a ≥-48. 函数f (x )=a x -2+1(a >0且a ≠1)的图像必经过点( ) A .(0,1) B .(1,1) C .(2,0)D .(2,2)9. 函数f (x )=lg(|x |-1)的大致图像是( )10. 函数f (x )=2x +3x 的零点所在的一个区间是( ) A .(-2,-1) B .(-1,0) C .(0,1)D .(1,2)11. 设f (x )=x ln x ,若f ′(x 0)=2,则x 0的值为( ) A .e 2B .eC.ln22D .ln212. 函数f (x )的定义域是R ,f (0)=2,对任意x ∈R ,f (x )+f ′(x )>1,则不等式e x ·f (x )>e x +1的解集为( ).A .{x |x >0}B .{x |x <0}C .{x |x <-1或x >1}D .{x |x <-1或0<1}<="" p="">二、填空题:本大题共4小题,每题5分.13. 已知函数y =f (x )及其导函数y =f ′(x )的图像如图所示,则曲线y =f (x )在点P 处的切线方程是__________.14. 若函数f (x )=x 2+ax +b 的两个零点是-2和3,则不等式af (-2x )>0的解集是________. 15. 函数y =12x 2-ln x 的单调递减区间为________.16. 若方程4-x 2=k (x -2)+3有两个不等的实根,则k 的取值范围是________.三、解答题:解答应写出文字说明、证明过程或演算步骤17.(10分) 化简:(1)3131421413223b a b a ab b a -(a >0,b >0);(2)(-278)23-+(0.002)12--10(5-2)-1+(2-3)0.18.(12分)已知函数f (x )=1a -1(a >0,x >0),(1)求证(用单调性的定义证明):f (x )在(0,+∞)上是增函数; (2)若f (x )在[12,2]上的值域是[12,2],求a 的值.19.(12分)已知定义在R 上的奇函数f (x )有最小正周期2,且当x ∈(0,1)时,f (x )=2x4x +1.(1)求f (1)和f (-1)的值; (2)求f (x )在[-1,1]上的解析式.20.(12分)已知函数f (x )=x 2+2ax +3,x ∈[-4,6]. (1)当a =-2时,求f (x )的最值;(2)求实数a 的取值范围,使y =f (x )在区间[-4,6]上是单调函数;(3)当a =1时,求f (|x |)的单调区间. 21.(12分)已知函数f (x )=x 3+x -16. (1)求曲线y =f (x )在点(2,-6)处的切线的方程;(2)直线l 为曲线y =f (x )的切线,且经过原点,求直线l 的方程及切点坐标; 22.(12分)已知函数f (x )=x 3-3ax -1,a ≠0. (1)求f (x )的单调区间;(2)若f (x )在x =-1处取得极值,直线y =m 与y =f (x )的图像有三个不同的交点,求m 的取值范围.2016届高三上学期第一次月考数学答题卡一、选择题(共12小题,每小题5分,共60分,每小题有一个正确答案)13、 14、15、 16、三、解答题17.(10分) 化简:(1)131421413223b a b a ab b a -(a >0,b >0);(2)(-278)23-+(0.002)12--10(5-2)-1+(2-3)0.18.(10分)已知函数f (x )=1a -1x(a >0,x >0),(1)求证(用单调性的定义证明):f (x )在(0,+∞)上是增函数; (2)若f (x )在[12,2]上的值域是[12,2],求a 的值.19.(12分)已知定义在R 上的奇函数f (x )有最小正周期2,且当x ∈(0,1)时,f (x )=2x4x +1.(1)求f (1)和f (-1)的值; (2)求f (x )在[-1,1]上的解析式.20.(12分)已知函数f(x)=x3+x-16.(1)求曲线y=f(x)在点(2,-6)处的切线的方程;(2)直线l为曲线y=f(x)的切线,且经过原点,求直线l的方程及切点坐标;21.(13分)已知函数f(x)=x2+2ax+3,x∈[-4,6].(1)当a=-2时,求f(x)的最值;(2)求实数a的取值范围,使y=f(x)在区间[-4,6]上是单调函数;(3)当a=1时,求f(|x|)的单调区间.22.(13分)已知函数f(x)=x3-3ax-1,a≠0.(1)求f(x)的单调区间;(2)若f(x)在x=-1处取得极值,直线y=m与y=f(x)的图像有三个不同的交点,求m的取值范围.2016届高三上学期第一次月考数学文试卷参考答案1.B2.A3.D4.D5.D6.A7.A8.D9.B10.B11.B12.A13. x -y -2=0 14. {x |-32<1}<="" p="">15. (0,1] 16. (512,34]17. 解 (1)原式=121311113233211212633311233().a b a b abab ab a b+-++----==(2)原式=(-278)23-+(1500)12--105-2+1=(-827)23+50012-10(5+2)+1=49+105-105-20+1=-1679. 18. (1)证明设x 2>x 1>0,则x 2-x 1>0,x 1x 2>0,∵f (x 2)-f (x 1)=(1a -1x 2)-(1a -1x 1)=1x 1-1x 2=x 2-x 1x 1x 2>0,∴f (x 2)>f (x 1),∴f (x )在(0,+∞)上是增函数. (2)解∵f (x )在[12,2]上的值域是[12,2],又f (x )在[12,2]上单调递增,∴f (12)=12,f (2)=2.易得a =25.19. 解(1)∵f (x )是周期为2的奇函数,∴f (1)=f (1-2)=f (-1)=-f (1),∴f (1)=0,f (-1)=0. (2)由题意知,f (0)=0. 当x ∈(-1,0)时,-x ∈(0,1).由f (x )是奇函数,∴f (x )=-f (-x )=-2-x4-x +1=-2x4x +1,综上,在[-1, 1]上,f (x )=2x4x +1,x ∈(0,1),-2x 4x+1,x ∈(-1,0),0,x ∈{-1,0,1}.20.解 (1)当a =-2时,f (x )=x 2-4x +3=(x -2)2-1,∵x ∈[-4,6],∴f (x )在[-4,2]上单调递减,在[2,6]上单调递增,∴f (x )的最小值是f (2)=-1,又f (-4)=35,f (6)=15,故f (x )的最大值是35. (2)∵函数f (x )的图像开口向上,对称轴是x =-a ,∴要使f (x )在[-4,6]上是单调函数,应有-a ≤-4或-a ≥6,即a ≤-6或a ≥4. (3)当a =1时,f (x )=x 2+2x +3,∴f (|x |)=x 2+2|x |+3,此时定义域为x ∈[-6,6],且f (x )=?x 2+2x +3,x ∈(0,6],x 2-2x +3,x ∈[-6,0],∴f (|x |)的单调递增区间是(0, 6],单调递减区间是[-6,0].21.解 (1)可判定点(2,-6)在曲线y =f (x )上.∵f ′(x )=(x 3+x -16)′=3x 2+1.∴f ′(x )在点(2,-6)处的切线的斜率为k =f ′(2)=13. ∴切线的方程为y =13(x -2)+(-6),即y =13x -32.(2)法一设切点为(x 0,y 0),则直线l 的斜率为f ′(x 0)=3x 20+1,∴直线l 的方程为y =(3x 20+1)(x -x 0)+x 30+x 0-16,又∵直线l 过点(0,0),∴0=(3x 20+1)(-x 0)+x 30+x 0-16,整理得,x 30=-8,∴x 0=-2,∴y 0=(-2)3+(-2)-16=-26,k =3×(-2)2+1=13. ∴直线l 的方程为y =13x ,切点坐标为(-2,-26.) 法二设直线l 的方程为y =kx ,切点为(x 0,y 0),则k=y0-0x0-0=x30+x0-16x0又∵k=f′(x0)=3x20+1,∴x30+x0-16x0=3x2+1,解之得x0=-2,∴y0=(-2) 3+(-2)-16=-26,k=3×(-2)2+1=13.∴直线l的方程为y=13x,切点坐标为(-2,-26).22.解(1)f′(x)=3x2-3a=3(x2-a),当a<0时,对x∈R,有f′(x)>0,∴当a<0时,f(x)的单调增区间为(-∞,+∞).当a>0时,由f′(x)>0,解得x<-a或x>a.由f′(x)<0,解得-a<x<a,< p="">∴当a>0时,f(x)的单调增区间为(-∞,-a),(a,+∞),单调减区间为(-a,a).(2)∵f(x)在x=-1处取得极值,∴f′(-1)=3×(-1)2-3a=0,∴a=1.∴f(x)=x3-3x-1,f′(x)=3x2-3,由f′(x)=0,解得x1=-1,x2=1.由(1)中f(x)的单调性可知,f(x)在x=-1处取得极大值f(-1)=1,在x=1处取得极小值f(1)=-3.∵直线y=m与函数y=f(x)的图像有三个不同的交点,结合如图所示f(x)的图像可知:实数m的取值范围是(-3,1).</x<a,<>。

郑州市第十六中学2018-2019学年高三上学期第三次月考试卷数学含答案

郑州市第十六中学2018-2019学年高三上学期第三次月考试卷数学含答案

郑州市第十六中学2018-2019学年高三上学期第三次月考试卷数学含答案 班级__________ 座号_____ 姓名__________ 分数__________一、选择题(本大题共12小题,每小题5分,共60分.每小题给出的四个选项中,只有一项是符合题目要求的.)1. 已知i z 311-=,i z +=32,其中i 是虚数单位,则21z z 的虚部为( ) A .1- B .54 C .i - D .i 54 【命题意图】本题考查复数及共轭复数的概念,复数除法的运算法则,主要突出对知识的基础性考查,属于容易题.2. 已知命题p 和命题,若p q ∧为真命题,则下面结论正确的是( )A .p ⌝是真命题B .q ⌝是真命题C .p q ∨是真命题D .()()p q ⌝∨⌝是真命题3. 已知实数[1,1]x ∈-,[0,2]y ∈,则点(,)P x y 落在区域20210220x y x y x y +-⎧⎪-+⎨⎪-+⎩……… 内的概率为( )A.34B.38C.14D.18【命题意图】本题考查线性规划、几何概型等基础知识,意在考查数形结合思想及基本运算能力.4. 12,e e 是平面内不共线的两向量,已知12AB e ke =-,123CD e e =-,若,,A B D 三点共线,则的值是( )A .1B .2C .-1D .-25. 圆心在直线2x +y =0上,且经过点(-1,-1)与(2,2)的圆,与x 轴交于M ,N 两点,则|MN |=( ) A .4 2 B .4 5 C .2 2D .2 56. 经过点()1,1M 且在两轴上截距相等的直线是( ) A .20x y +-= B .10x y +-=C .1x =或1y =D .20x y +-=或0x y -=7. 为调查某地区老人是否需要志愿者提供帮助,用简单随机抽样方法........从该地区调查了500位老年人,结果如下:由2()()()()()n ad bc K a b c d a c b d -=++++算得22500(4027030160)9.96720030070430K ⨯⨯-⨯==⨯⨯⨯ 附表:参照附表,则下列结论正确的是( )①有99%以上的把握认为“该地区的老年人是否需要志愿者提供帮助与性别无.关”; ②有99%以上的把握认为“该地区的老年人是否需要志愿者提供帮助与性别有.关”; ③采用系统抽样方法比采用简单随机抽样方法更好; ④采用分层抽样方法比采用简单随机抽样方法更好; A .①③ B .①④ C .②③ D .②④8. 执行下面的程序框图,若输入2016x =-,则输出的结果为( )A .2015B .2016C .2116D .20489. “1ab >”是“10b a>>”( ) 3.841 6.635 10.828k 2() 0.050 0.010 0.001P K k ≥A .充分不必要条件 B.必要不充分条件 C.充分必要条件 D.既不充分也不必要条件 10.已知集合,则A0或 B0或3C1或则几何体的体积为( )34意在考查学生空间想象能力和计算能()2log f x x =的图象( ).向上平移1个单位 D .向下平移1个单位分.把答案填写在横线上)上到顶点和准线距离相等的点的坐标为 .1cos 2c B a b ⋅=+,ABC ∆的面积12S =,15.已知a 、b 、c 分别是ABC ∆三内角A B C 、、的对应的三边,若C a A c cos sin -=,则3s i n c o s ()4A B π-+的取值范围是___________. 【命题意图】本题考查正弦定理、三角函数的性质,意在考查三角变换能力、逻辑思维能力、运算求解能力、转化思想.16.对于函数(),,y f x x R =∈,“|()|y f x =的图象关于y 轴对称”是“()y f x =是奇函数”的 ▲ 条件. (填“充分不必要”, “必要不充分”,“充要”,“既不充分也不必要”)三、解答题(本大共6小题,共70分。

空间几何体的切接球问题(八个模型)

空间几何体的切接球问题(八个模型)

微专题 立体几何3空间几何体的外接球与内切球——八个模型一些提速的小结论:1.设正三角形边长为a ,则其高h =,外接圆半径r a =,面积2S =;2.设正四面体棱长为a ,则其高h =,外接球半径R =外,内切球半径4h R ==内,体积312V a =,正四面体相对棱的距离为2d =模型一 墙角模型模型解读:类似于三角形有且仅有唯一一个外接圆,将三角形补成平行四边形,则该平行四边形外接圆与三角形外接圆是同一个外接圆;三菱锥有且仅有一个外接球,特殊情况下,将其补成一个长方体,则该长方体与三棱锥有共同的外接球。

根据对称性,长方体体对角线即为外接球的直径。

模型公式:2222)2(c b a R ++=或2222c b a R ++=; 秒杀公式:()222S a b c π=++,()222222V ab c a b c π=++++适用情况:几何体中有三条两两垂直的棱时(非必要条件,见图3)。

(柱体适应模型1)c abCP A Babc 图2PCBAabc 图3CBPAa bc PCO 2BA典型例题例1、已知各顶点都在同一球面上的正四棱柱的高为4,体积为16,则这个球的表面积是( C ) A .π16 B .π20 C .π24 D .π32例2、若三棱锥的三个侧面两两垂直,且侧棱长均为3,则其外接球的表面积是 9π 例3、若三棱锥的三个侧面两两垂直,它们的面积分别为6、4、3,那么它的外接球的表面积是 29π跟踪练习1、已知某几何体的三视图如图所示,三视图是腰长为1的等腰直角三角形和边长为1的正方形,则该几何体外接球的体积为2、若三棱锥ABC S -的三条侧棱两两垂直,且2=SA ,4==SC SB ,则该三棱锥的外接球半径为( A ) A.3B.6C.36D.93、(2018宝鸡模拟)已知底面边长为12的正四棱柱的各顶点均在同一个球面上,则该球的体积为( D )32.3A π .4B π .2C π 4.3D π4、(广东省汕头市达濠华桥中学2017-2018学年期末)《九章算术》中,将四个面都为直角三角形的三棱锥称之为鳖臑.若三棱锥P ABC -为鳖臑, PA ⊥平面ABC , 2,4PA AB AC ===,三棱锥P ABC -的四个顶点都在球O 的球面上,则球O 的表面积为( C )A. 8πB. 12πC. 20πD. 24π5、(2020·安徽高三(理))已知一个正方体的各顶点都在同一球面上,现用一个平面去截这个球和正方体,得到的截面图形恰好是一个圆及内接正三角形,若此正三角形的边长为a ,则这个球的表面积为( D ). A .234a πB .23a πC .26a πD .232a π6、(2020延安高考模拟)刘徽《九章算术•商功》中将底面为长方形,两个三角面与底面垂直的四棱锥叫做阳马.如图,是一个阳马的三视图,则其外接球的体积为( B )A .B .C .D .7、(2020菏泽高三模拟)已知直三棱柱的底面为直角三角形,且两直角边长分别为1和,此三棱柱的高为,则该三棱柱的外接球的体积为( C ) A .B .C .D .8、(2020届·厦门市五月质量检测理6)某三棱锥的三视图如图所示,其中网格纸上小正方形的边长为1,则该几何体的外接球的表面积为( B ) A.9π B.27π C.81π D.108π9、已知一个三棱锥的三视图如图,其中俯视图是斜边长为2的等腰直角三角形,该三棱锥的外接球的半径为2,则该三棱锥的体积为(C )(A )2 (B )43 (C )23(D )2210、(2017云南第二次统一检测)已知体积为6的长方体的八个顶点都在球O 的球面上,在这个长方体经过同一个顶点的三个面中,如果有两个面的面积分别为343O 的体积等于( A ) A .323π B .73π C .332πD .1172π11、(2017江西赣州模拟)在四面体SABC 中,SA ⊥平面ABC ,∠ABC =90°,SA =AC =2,AB =1,则该四 面体的外接球的表面积为 . 8π提升练习1、在正三棱锥S ABC -中,M N 、分别是棱SC BC 、的中点,且MN AM ⊥,若侧棱3SA =三棱锥ABC S -外接球的表面积是 。

北京一零一中学2022至2023学年高三上学期10月月考化学试题附参考答案

北京一零一中学2022至2023学年高三上学期10月月考化学试题附参考答案

北京101中学2023届上学期高三年级10月月考化学试卷本试卷分为I卷、II卷两部分,共19个小题,满分100分;答题时间为90分钟I卷:选择题(共42分)每小题只有一个选项符合题意。

每小题3分,共42分。

1. 下列图示正确的是A. 3p电子的电子云轮廓图:B. SO3的VSEPR模型:C. 基态氧原子的轨道表示式:D. H—Cl的形成过程:2. 关于人体营养物质,下列说法不正确的是A. 葡萄糖和麦芽糖都可以发生银镜反应B. 血红蛋白中的Fe(II)配合物能够携氧,是因为Fe(II)可以与氧气分子形成配位键C. 油脂长时间放置后会产生不愉快的气味,是因为被氧气氧化了D. DNA通过共价键结合成稳定的双螺旋结构3. 下列化学用语表示不正确的是A. Mg2+的结构示意图:B. 醋酸的实验式:CH2OC. S2-的电子排布式:1s22s22p63s23p6D. 基态铬原子(24Cr)的价层电子排布式:3d44s24. 下列有关微粒性质的排列顺序中,不正确的是A. 原子半径:Na>S>OB. 稳定性:H2O>H2S>PH3C. 电负性:N>O>CD. 第一电离能:O<F<Ne5. 下列各组物质中,化学键类型和晶体结构类型都相同的是A. SiO2和H2OB. CO2和Na2CO3C. KOH和NaClD. NaCl和BaBr26. 下列有关共价键和键参数的说法不正确的是A. 反-2-丁烯(C4H8)分子中含有8个极性键和4个非极性键B. 碳碳双键比碳碳单键键能更大,故碳碳双键更稳定C. C—H键比Si—H键键长更短,故CH4比SiH4更稳定D. 由于孤电子对的存在,H2O分子中的键角小于109°28'7. 化合物M是一种治疗脑卒中药物中间体,其结构简式如下图。

下列关于该有机物的说法不正确的是A. 存在顺反异构B. 分子中有3种含氧官能团C. 能与Br2发生取代反应和加成反应D. 1 mol该有机物最多消耗2 mol NaOH8. 萤石是制作光学玻璃的原料之一,其主要成分氟化钙的晶胞结构如下图所示。

高一数学必修3第二次月考试题

高一数学必修3第二次月考试题

第二次月考试题时间120分钟,满分150分。

一、选择题(本大题共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个是符合题目要求的)1.下面的问题中必须用条件结构才能实现的个数是()①已知三角形三边长,求三角形的面积;②求方程ax+b=0(a,b为常数)的根;③求三个实数a,b,c中的最大者;④求1+2+3+…+100的值.A.4个B.3个C.2个D.1个[答案]C[解析]②③解决时用到条件结构,①用到顺序结构,④可用公式S n=100×(1+100)2直接求得.2.一个样本容量为20的样本数据,分组后,组距和频数如下:(10,20],2;(20,30],3;(30,40],4;(40,50],5;(50,60],4;(60,70],2,则样本在区间(8,50]上的频率是()A.0.5 B.0.25C.0.05 D.0.7[答案]D[解析]2+3+4+520=0.7.3.从2 008名学生中选取50名学生参加英语比赛,若采用下面的方法选取:先用简单随机抽样从2 008人中剔除8人,剩下的2 000人中再按分层抽样的方法抽取50人,则在2 008人中,每人入选的概率()A.不全相等B.均不相等C.都相等,且为502 008D.都相等,且为140[答案]C4.下列有四种说法:①概率就是频率;②“我国乒乓健儿将在2012年的伦敦奥运会上囊括四枚金牌”是必然事件;③某厂产品的次品率为3%,是指“从该厂产品中任意地抽取100件,其中一定有3件次品”;④从一批准备出厂的灯泡中随机抽取15只进行质量检测,其中有1只是次品,说明这批灯泡中次品的概率为115.其中正确说法的个数是()A.0 B.1C.2 D.3[答案]A5.若程序框图如图所示,则循环体执行的次数是()A .99B .100C .101D .102 [答案] C[解析] 主要分析最后一项i =0时,仍然循环,所以循环101次. 6.抛掷一枚骰子,观察掷出的点数.设事件A 为“出现奇数点”,B 为“出现2点”,已知P(A)=12,P(B)=16,则“出现奇数点或2点”的概率为( )A .112 B .13 C .23 D .712[答案] C[解析] A 与B 为互斥事件,P =P(A)+P(B)=12+16=23. 7.把十进制数15化为二进制数为( )A.1 011 B.1 001(2)C.1 111(2)D.1 101[答案]C[解析]由除k取余法可得15=1 111(2).8.甲、乙两人在10天中每天加工零件的个数用茎叶图表示如下图,中间一列的数字表示零件个数的十位数,两边的数字表示零件个数的个位数,则这10天甲、乙两人日加工零件的平均数分别为________和________.()A.21.5.23 B.20,24C.24,23 D.23,24[答案]C9.如图,在地面上放置一个塑料圆盘,且盘上A区域所对应弧长是B区域弧长的一半,甲将一个玻璃球随意丢到该圆盘中,则玻璃球落在A区域的概率应为()A .12B .18C .13D .1[答案] C[解析] 因A 区域所对弧长为B 区域弧长的一半,则A 区域的面积是B 区域面积的一半,所以玻璃球落在A 区域的概率为13.10.在三棱锥的六条棱中任意选择两条,则这两条棱是一对异面直线的概率为( )A .120B .115 C .15 D .16[答案] C[解析] 如图,在三棱锥S -ABC 中,任选两条棱,所有选法有:(SA ,SB),(SA ,SC),(SA ,AC),(SA ,AB),(SA ,BC),(SB ,SC),(SB ,AC),(SB ,AB),(SB ,BC),(SC ,AC),(SC ,AB),(SC ,BC),(AB ,AC),(AB ,BC),(AC ,BC)共15种.其中异面直线的有:(SA ,BC),(SC ,AB),(SB ,AC)共3种. ∴P =315=15.11.已知样本:10 8 6 10 13 8 10 12 11 7 8 9 11 9 12 9 10 11 12 12 那么频率为0.3的范围是( ) A .5.5~7.5 B .7.5~9.5 C .9.5~11.5 D .11.5~13.5[答案] B[解析] 在7.5~9.5内的值为8、9,频率为6,所以频率为620=0.312.据人口普查统计,育龄妇女生男生女是等可能的,如果允许生育二胎,则某一育龄妇女生育两胎均是女孩的概率是( )A .12B .13C .14D .15 [答案] C[解析] 事件“该育龄妇女连生两胎”包含4个基本事件,即(男,男),(男,女),(女,男),(女,女);故两胎均为女孩的概率为14.二、填空题(本大题共4小题,每小题5分,共20分.把答案填在题中的横线上)13.如下图,为了了解某地区高三学生的身体发育情况,抽查了该地区100名年龄为17岁~18岁的男生体重(kg ),得到频率分布直方图如下图所示.据图可得这100名学生中体重在[58.5,74.5)的学生人数是________.[答案] 89[解析] 体重在[58.5,74.5)的学生概率为P =1-(0.01+0.015+0.03)×2=0.89. 0.89×100=89.14.某校共有2 500名学生,其中男生1 300名,女生1 200名,用分层抽样法抽取一个容量为200的样本,则男生应抽取________名.[答案] 104[解析] 200×1 3002 500=104(名).15.某人午睡觉醒来,发现表停了,他打开收音机想听电台整点报时,则他等待的时间不多于6分钟的概率是________.[答案] 110[解析] 整点报时的间隔为60分钟,等待的时间不多于6分钟,应当在第54分钟后醒来,即P =660=110.16.我国西部一个地区的年降水量在下列区间内的概率如下表所示:[答案]0.25[解析]设年降水量在[200,300]、[200,250)、[250,300]的事件分别为A、B、C,则A=B∪C,且B、C为互斥事件,∴P(A)=P(B)+P(C)=0.13+0.12=0.25.三、解答题(本大题共6个大题,共70分,解答应写出文字说明,证明过程或演算步骤)17.(本小题满分10分)袋中有大小相同的红、黄两种颜色的球各1个,从中任取1个球,有放回地抽取3次.求(1)所取3个球全是红球的概率;(2)所取3个球颜色全相同的概率;(3)所取3个球颜色不全相同的概率.[解析]基本事件有:(红,红,红),(红,红,黄),(红,黄,黄),(红,黄,红),(黄,红,红),(黄,红,黄),(黄,黄,黄),(黄,黄,红)共8个.每个基本事件的发生都是等可能的.(1)3个球全是红球只有(红,红,红)1个基本事件,故所求概率P(A)=1 8.(2)3个球颜色全相同包含(红,红,红),(黄,黄,黄)2个基本事件,故所求概率P(B)=28=14.(3)3个球颜色不全相同和3个球颜色全相同为对立事件,故所求概率P(C)=1-P(B)=1-14=34(也可用直接法求解). 18.(本小题满分12分)如图,在边长为25 cm 的正方形中挖去边长为23 cm 的两个等腰直角三角形.现有均匀的粒子散落在正方形中.问粒子落在中间带形区域的概率是多少?[解析] 因为均匀的粒子落在正方形内任何一点是等可能的, 所以符合几何概型的条件.设A =“粒子落在中间带形区域”,则依题意,得 正方形的面积为25×25=625,两个等腰直角三角形的面积为2×12×23×23=529, 带形区域的面积为625-529=96,∴P(A)=96625.19.(本小题满分12分)为了参加奥运会,对自行车运动员甲、乙两人在相同的条件下进行了6次测试,测得他们的最大速度的数据如表所示:(1)(2)求甲、乙二人这6次测试最大速度的标准差,并说明谁参加这项重大比赛更合适.[解析] (1)X 甲=27+38+30+37+35+316=33, X 乙=33+29+38+34+28+366=33. (2)s 甲=473=1413,s 乙=383=1143,X 甲=X 乙,s 甲>s 乙.所以乙的成绩更稳定,乙参加更合适.20.(2012·广东高考卷)某校100名学生期中考试语文成绩的频率分布直方图如图所示,其中成绩分组区间是:[50,60][60,70][70,80][80,90][90,100]. (1)求图中a 的值;(2)根据频率分布直方图,估计这100名学生语文成绩的平均分; (3)若这100名学生语文成绩某些分数段的人数(x)与数学成绩相应分数段的人数(y)之比如下表所示,求数学成绩在[50,90)之外的人数.(2)平均分为55×0.05+65×0.4+75×0.3+85×0.2+95×0.05=73.(3)数学成绩在[50,90)内的人数为(0.005+12×0.04+43×0.03+54×0.02)×10×100=90人,数学成绩在[50,90)外的人数为100-90=10人.21.(本小题满分12分)某学校在2010年的招聘教师考试合格的成绩中随机抽取100名考生的笔试成绩,按成绩分组,得到的频率分布表如下图所示.率分布直方图;(2)为了能选拔出最优秀的老师,学校决定在笔试成绩高的第3、4、5组中用分层抽样抽取6名考生进入第二轮面试,求第3、4、5组每组各抽取多少名考生进入第二轮面试?(3)在(2)的前提下,学校决定在6名考生中随机抽取2名考生接受校长面试,求:第4组至少有一名考生被校长面试的概率?[解析](1)由题可知,第2组的频数为0.35×100=35人,第3组的频率为30100=0.300,频率分布直方图如下:(2)因为第3、4、5组共有60名学生,所以利用分层抽样在60名学生中抽取6名学生,每组分别为:第3组:3060×6=3人,第4组:2060×6=2人,第5组:1060×6=1人.所以第3、4、5组分别抽取3人、2人、1人.(3)设第3组的3位同学为A1,A2,A3,第4组的2位同学为B1,B2,第5组的1位同学为C1.则从六位同学中抽两位同学有15种可能如下:(A1,A2),(A1,A3),(A1,B1),(A1,B2),(A1,C1),(A2,A3),(A2,B1),(A2,B2),(A2,C1),(A3,B1),(A3,B2),(A3,C1),(B1,B2),(B1,C1),(B2,C1),其中第4组的2位同学为B1,B2至少有一位同学入选的有:(A1,B1),(A1,B2),(A2,B1),(A2,B2),(A3,B 1),(A 3,B 2),(B 1,B 2),(B 1,C 1),(B 2,C 1),9种可能.∴P =35.22.(本小题满分12分)某电视台在一次对收看文艺节目和新闻节目观众的抽样调查中,随机抽取了100名电视观众,相关的数据如下表所示:关?(2)用分层抽样方法在收看新闻节目的观众中随机抽取5名,大于40岁的观众应该抽取几名?(3)在上述抽取的5名观众中任取2名,求恰有1名观众的年龄为20至40岁的概率.[解析] (1)因为在20至40岁的58名观众中有18名观众收看新闻节目,而大于40岁的42名观众中有27名观众收看新闻节目.所以,经直观分析,收看新闻节目的观众与年龄是有关的.(2)应抽取大于40岁的观众人数为2745×5=35×5=3(名). (3)用分层抽样方法抽取的5名观众中,20至40岁有2名(记为Y 1,Y 2),大于40岁有3名(记为A 1,A 2,A 3),5名观众中任取2名,共有10种不同取法:Y 1Y 2,Y 1A 1,Y 1A 2,Y 1A 3,Y 2A 1,Y 2A 2,Y 2A 3,A 1A 2,A 1A 3,A 2A 3.设A 表示随机事件“5名观众中任取2名,恰有1名观众年龄为20至40岁”.则A中的基本事件有6种:Y1A1,Y1A2,Y1A3,Y2A1,Y2A2,Y2A3.故所求概率为P(A)=610=35.。

北京市海淀区北京一零一中学23届高三上学期9月月考数学含答案

北京市海淀区北京一零一中学23届高三上学期9月月考数学含答案

北京101中学2023届上学期高三年级9月月考数学试卷一、选择题共10小题。

在每小题列出的四个选项中,选出符合题目要求的一项。

1. 已知集合M ={x ∈Z |1g (x -1)≤0},N ={x ∈Z|x |<2},则M N =( ) A.φB. (1,2)C. (-2,2]D. {-1,0,1,2}2. 如果-1,a ,b ,c ,-9成等比数列,那么( ) A. b =3,ac =9B. b =-3,ac =9C. b =3,ac =-9D. b =-3,ac =-93. 设)(x f ,)(x g 都是单调函数,有如下四个命题:①若)(x f 单调递增,)(x g 单调递增,则)(x f -)(x g 单调递增; ②若)(x f 单调递增,)(x g 单调递减,则)(x f -)(x g 单调递增; ③若)(x f 单调递减,)(x g 单调递增,则)(x f -)(x g 单调递减; ④若)(x f 单调递减,)(x g 单调递减,则)(x f -)(x g 单调递减。

其中,正确的命题是( ) A. ①③B. ①④C. ②③D. ②④4. 若ab >0,且a <b ,则下列不等式一定成立的是( ) A. 22b a <B.a 1<b1C.2>+ba ab D.2ba +>ab 5. 已知△ABC 中,角A ,B ,C 所对的边分别为a ,b ,c ,若CcB b A a cos cos cos ==,则△ABC 是( )A. 钝角三角形B. 等边三角形C. 等腰直角三角形D. 直角三角形,但不是等腰三角形6. 已知函数)(x f =cos 2ωx -sin 2ωx (ω>0)的最小正周期为π,则( ) A. )(x f 在(0,2π)内单调递增B. )(x f 在(0,2π)内单调递减 C. )(x f 在(4π,43π)内单调递增D. )(x f 在(4π,43π)内单调递减7. 若)(x f 是R 上周期为5的奇函数,且满足f (1)=1,f (2)=2,则f (3)-f (4)=( )A. -1B. 1C. -2D. 28. 下图是下列四个函数中的某个函数在区间[-3,3]的大致图像,则该函数是( )A. 1323++-=x xx yB. 123+-=x xx yC. 1cos 22+=x xx yD. 1sin 22+=x xy 9. 已知函数)(x f =x 3+x 2-2|x |-k 。

2018北京101中学高三(下)3月月考英语含答案

2018北京101中学高三(下)3月月考英语含答案

2018北京101中学高三(下)3月月考英语第一部分:知识运用(共两节,45分)第一节单项填空(共15小题;每小题1分,共15分)从每题所给的A、B、C、D四个选项中,选出最佳选项.1.(1分)There is still a copy of the book in the library.Will you go and borrow _____?I'd rather buy _____ in the book store.()A.it; one B.one; one C.one; it D.it it2.(1分)I think John will make a good monitor, ________ I'd like to vote for him.()A.but B.so C.or D.for3.(1分)______ colorful charts and graphs,he loaded a new software to help him.()A.Create B.Created C.Creating D.To create4.(1分)Mum,where's my packed lunch?In the kitchen. I you two sandwiches.()A.make B.am making C.have made D.will make5.(1分)Jackson is cheerful about his life _______ he is suffering from cancer.()A.even if B.as long as C.as if D.ever since6.(1分)______ people food,housing and jobs is what a government should first consider after a natural disaster happens.()A.Offered B.OfferC.Offering D.Being offered7.(1分) Mike, did you see Mr. Chapman in the office just now?Yes, he ________, and he looked a little bit nervous.()A.had interviewedB.was interviewedC.was being interviewedD.is being interviewing8.(1分)The young lady, ________ several attempts to fix her cell phone, decided to have another try.()A.making B.to have madeC.having made D.made9.(1分)That must have been a terrible experience.Yeah.I in the damaged car,unable to move.()A.was stuck B.have been stuckC.am stuck D.had been stuck10.(1分)The word"media"basically refers to ________ we commonly call newspapers,magazines,radios and televisions.()A.which B.that C.what D.where11.(1分)Last month,part of Southeast Asia was struck by floods,from _______effects the people are still suffering.()A.that B.what C.which D.whose12.(1分)The writer has won the hearts of millions of children with the rich stories _____from her childhood memories.()A.drawing B.to draw C.draw D.drawn13.(1分)But for your error, it _______ easier for you to pass the driving test. After all, you had highquality training.()A.must have been B.should beC.might have been D.could be14.(1分)Can I pay the bill by check?Sorry,sir.But it is the management rules of our hotel that payment ____ be made in cash.()A.shall B.mustn't C.can't D.will15.(1分)Just hang the towel ______ the back of the chair so that it will dry soon.()A.over B.for C.with D.through第二节完形填空(每小题1.5分,共30分)阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项.16.(30分)The "Doorman"On a trip to California,my family stopped for lunch.As we walked toward the entrance to the restaurant,a man,with a (1) beard and dirty hair,jumped up from a bench and opened the door for us.Regardless of his (2),he greeted us in a friendly way.Once inside,my daughters whispered,"Mom,he (3)"After we ordered our lunch,I explained,telling the kids to look (4)the dirt.We then watched other customers approach the restaurant but many (5)him.Seeing this rudeness truly upset me.The day I became a mother,I had resolved to set a good(6)for my children.Yet sometimes when things didn't go right,being a good example was (7)When our meal arrived,I realized I had left the carsick pills in the truck.With the windiest trip ahead,the kids needed them,so I (8) myself from the meal and went to get them.Just then,the "doorman" was opening the door for a couple.They rushed past him without even acknowledging his (9) Letting them in first,I said a loud "thank you" to him as I (10).When I returned,we talked a bit.He said he was not allowed inside (11) he purchased food.I went back and told my family his (12).Then I asked our waitress to add one soup and sandwich.The kids looked (13) as we had already eaten,but when I said the order was for the "doorman",they smiled.When it was time to (14)our trip,I noticed the "doorman" enjoying his meal.Upon seeing me,he stood up and thanked me heartily.He then (15) his hand for a handshake and I gratefully accepted.I suddenly noticed the tears in his eyes tears of (16).What happened next drew great astonishment:I gave the "doorman" a(17) I He pulled away,with tears (18)down his face.Back in truck,I fell into deep thought.While we can't choose many things in life,we can choose when to show gratitude.I said thanks to a man who had (19)held open a door for me,and also said thanks for that (20)to teach my children by example.(1)A.heavy B.long C.messy D.grey(2)A.service B.appearance C.status D.attitude(3)A.smokes B.smiles C.sniffs D.smells(4)A.beyond B.over C.around D.into(5)A.hated B.ignored C.missed D.refused(6)A.target B.rule C.record D.example(7)A.stressful B.accessible C.awkward D.tough(8)A.excused B.freed C.prevented D.withdrew(9)A.company B.presence C.effort D.attempt(10)A.quitted B.marched C.exited D.approached(11)A.before B.unless C.though D.since(12)A.story B.deed C.experience D.demand(13)A.concerned B.shocked C.puzzled D.bored(14)A.make B.start C.take D.continue(15)A.extended B.washed C.raised D.waved(16)A.approval B.affection C.sympathy D.gratitude(17)A.hug B.nod C.lift D.clap(18)A.slipping B.streaming C.rushing D.breaking(19)A.firmly B.constantly C.simply D.politely(20)A.journey B.wisdom C.opportunity D.coincidence第二部分:阅读理解(共两节,40分)第一节(共30分)阅读下面短文,从各题A、B、C、D四个选项中选出最佳答案.17.(6分)Northern Ireland Visitor GuidePassport/Visa Requirements Passport Advice Line (UK)T: 0300 222 0000MoneySterling currency. Most large stores accept Euro. Main credit cards are in general use but bring cash too. In main towns, bankwww.ips.gov.ukUK nationals can travel without a passport but will need photographic identification. Passports are not required for travel between Northern Ireland and the Republic. For further information, contact the British Embassy inyour country of origin.hours are 09:3016:30. Automatic Teller Machines (ATMs)dispense cash at hundreds of locations, banks, garages and shopping centres. Bureau de Change are in larger bank branches,travel agents, the Belfast Welcome Centre, some other tourist information centres, big hotels and at a few visitor attractions.TelephoneTo call Northern Ireland from abroad, dial 0044 + area code (without 0)+ local number. From the Republic of Ireland, dial 048 + area code (without 0)+ local number. From elsewhere in UK or to make an internal call, dial area code (with 0)+ local number. To call the Republic from Northern Ireland, dial 00353 + the area code (without0)+ local number.TippingCheck your bill to see if a service charge has been made. If not and you're satisfied with the service, add 1015%.Left LuggageT: +44 (0)28 9024 6609Belfast Welcome Centre is the only place that provides this service.£ 3per item for up to 4hrs.£ 4.5 0 4hrs+. Last pickup is 15minutes before closing.ShoppingVictoria Square, Castle Court and many Belfast City centre stores have extended opening hours from 09:00 until 19:00 eachweekday evening. Thursday is late night shopping until 21:00. On Sundays shops are open from 12:00/13:00 and stay openuntil 17:00/18:00.Medical InsuranceT: 0845 606 0707(UK), +44 (0)191 212 7500www.ehic.org.ukYou need to obtain a European Health Insurance card (EHIC)which will allow you to access stateprovided healthcare in all European Economic Area (EEA) countries at a reduced cost or sometimes free of charge. You can apply online at their website orby telephone. Visitors are strongly advised to take out private travelinsurance.Public HolidaysBanks are closed and transport servicesare reduced on public holidays. Seewww.discovernorthernireland.comfor uptodate details.New Year's Day JanuarySt. Patrick's Day MarchGood Friday start AprilEaster Monday start AprilMay Bank Holiday start MayMay Bank Holiday end MayJuly Holiday mid JulyAugust Bank Holiday end AugustChristmas Day DecemberBoxing Day DecemberEmergency ServicesDial 999 for emergency services.If your passport is lost or stolen, contact the local police station,embassy or consulate.All Ireland InformationFor details on the rest of Ireland visit:www.diseoverireland.com.36. If Jack wants to call his friend in Northern Ireland from London, he should dial.A. 0044 + area code (without 0)+ local numberB. 048 + area code (without 0)+ local numberC. area code (with 0)+ local numberD. 00353 + the area code (without 0)+ local number37. While travelling in Northern Ireland, you.A. can shop until 21:00 on ThursdaysB. needn't leave a tip after receiving serviceC. can use American dollars to buy what you wantD. can draw money from banks from 9:00 to 16:30 every day38. Which of the following is TRUE according to the above Visitor Guide?A. A German needn't a passport to travel in Northern Ireland.B. A visitor can dial 999 in emergency situations while in Northern Ireland.C. Any European can get healthcare in Northern Ireland at a reduced cost or free of charge.D. A visitor will be charged £3 for leaving luggage in Belfast Welcome Centre for 6hours.18.(8分)Bertie knew there was something in the wind. His mother had been sad in recent days, not sick, just strangely sad. The lion had just lain down beside him, his head warm on Bertie's feet, when Father cleared his throat and began, "You'll soon be eight, Bertie. A boy needs a proper education. We've found the right place for you, a school near Salisbury in England."His heart filled with a terrible fear, all Bertie could think of was his white lion. "But the lion," he cried,"What about the lion?""I'm afraid there's something else I have to tell you," his father said. Looking across at Bertie's mother, he took a deep breath. Then he told Bertie he had met a circus owner from France, who was over in Africa looking for lions to buy. He would come to their farm in a few days."No! You can't send him to a circus!" said Bertie. "People will come to see him. He'll be shut up behind bars. I promised him he never would be. And they will laugh at him. He'd rather die. Any animal would!" But as he looked across the table at them, he knew their minds were quite made up.Bertie felt completely betrayed. He waited until he heard his father's deep breathing next door. With his white lion at his heels, he crept downstairs in his pyjamas, took down his father's rifle from the rack and stepped out intothe night. He ran and ran till his legs could run no more. As the sun came up over the grassland, he climbed to the top of a hill and sat down, his arms round the lion's neck. The time had come."Be wild now," he whispered. "You've got to be wild. Don't ever come home. All my life I'll think of you,I promise I will." He buried his head in the lion's neck. Then, Bertie clambered down off the hill and walked away.When he looked back, the lion was still sitting there watching him; but then he stood up, yawned,stretched, and sprang down after him. Bertie shouted at him, but he kept coming. He threw sticks. He threw stones. Nothing worked.There was only one thing left to do. With tears filling his eyes and his mouth, he lifted the rifle to his shoulder and fired over the lion's head.39. Bertie's mother was sad probably because she.A. had been seriously ill recentlyB. had decided to send Bertie to schoolC. knew selling the lion would upset BertieD. knew Bertie would hate to go to England40. The underlined word "they" in Para. 4 probably refers to.A. some audienceB. other animalsC. Bertie's parentsD. circus's owners41. In the last paragraph, the boy lifted the rifle at the lion to.A. kill the lion out of fearB. threaten the lion back to the wildC. protect himself from the lionD. show his anger towards his father42. The passage intends to show that.A. animal hunting is popular in AfricaB. parents are sometimes cruel to their childrenC. animals usually lead a miserable life in circusesD. people and animals can be faithful to each other19.(8分)Adding math talk to story time at home is a winning factor for children's math achievement, according to a new research from the University of Chicago. The study from psychologists Sian Beilock and Susan Levine shows a marked increase in math achievement among children whose families used Bedtime Math, an iPad app that delivers engaging math story problems for parents and children to solve together.Even children who used the app with their parents as little as once a week saw gains in math achievement by the end of the school year. The app's effect was especially strong for children whose parents tend to be anxious or uncomfortable with math.Previous research from this group has demonstrated the importance of adults' attitudes about math for children's math success. For example, a recent study found that mathanxious parents who help their children with math homework actually weaken their children's math achievement.The new findings demonstrate that structured, positive interactions around math at home can cut the link between parents' uneasiness about math and children's low math achievement."Many people experience high levels of anxiety when they have to solve a math problem, with a majority of adults feeling at least some worries about math," said Beilock, professor in Psychology and author of Choke, a book about stress and performance. "These mathanxious parents are probably less likely to talk about math at home, which affects how competent their children are in math. Bedtime Math encourages a dialogue between parents and kids about math, and offers a way to engage in high quality math interactions in a low effort, high impact way."Study participants included 587firstgrade students and their parents. Families were given an iPad installed with a version of the Bedtime Math app, with which parents and their children read stories and answer questions involving math, including topics like counting, shapes and problem solving. A control group received a reading app that had similar stories without the math content and questions related to reading comprehension instead. Children's math achievement was assessed at the beginning and end of the school year. Parents completed a questionnaire about their nervousness with math.The more times parents and children in the math group used the app, the higher children's achievement on a math assessment at the end of the school year. Indeed, children who frequently used the math app with their parents outperformed similar students in the reading group by almost three months in math achievement at year's end.43. Bedtime Math is an iPad app that.A. requires parents and children to answer reading comprehension questionsB. assesses children's math achievement and parents' nervousness with mathC. encourages children together with their parents to solve math story problemsD. teaches children how to count, recognize shapes and solve practical problems44. The previous study found that.A. help from mathanxious parents improves children's math achievementB. interactions around math at home will cut off the family relationshipC. children's math achievement is related to parents' attitude about mathD. children can achieve more success if they see the importance of math45. We can infer from the passage that.A. it is the math problems related to the stories that make the great differenceB. children whose parents are uneasy about math outperform other studentsC. children using the app for three months can see gains in math achievementD. the frequency of using the app has nothing to do with children's achievement46. Which does the author want to tell us?A. High anxiety parents influence children's attitude about math.B. Frequent use of app can develop problem solving ability.C. Low effort activities create good parent child relationship.D. High quality math interactions improve children's performance.20.(8分)As anyone who has tried to lose weight knows, realistic goalsetting generally produces the best results. That's partly because most people who set realistic goals actually work more efficiently, and put more effort, to achieve those goals.What's far less understood by scientists, however, are the potentially harmful effects of goalsetting. Newspapers convey daily accounts of goalsetting widespread in industries and businesses up and down both Wall Street and Main Street, yet there has been surprisingly little research on how the long advocated practice of setting goals may have contributed to the current economic crisis, and immoral behavior in general."Goals are widely used and promoted as having really beneficial effects. And yet, the same motivation that can push people to put more effort in a constructive way could also motivate people to be more likely to engage in immoralbehaviors," says Maurice Schweitzer, an associate professor at Penn's Wharton School. His paper, entitled"'Goals Gone Wild: The Systematic Side Effects of Over Praised Goal Setting," appears in the February issue of the Academy of Management Perspectives."It turns out there's no financial benefit to just having a goal you just get a psychological benefit." Schweitzer says. "But in many cases, goals have financial rewards that make them more powerful." A major example Schweitzer and his colleagues give is the 2004 breakdown of energy trading giant Enron(德国安然公司), where managers used financial rewards to motivate salesmen to meet specific goals. The problem, Schweitzer says, is that the actual trades were not profitable.Other studies have shown that burdening employees with unrealistic goals can force them to lie, cheat or steal. Such was the case in the early 1990s when Sears (西尔斯公司) placed a sales quota (销售限额) on its auto repair staff. It inspired employees to overcharge for work and to complete unnecessary repairs on a companywide basis.Schweitzer admits his research runs counter to a very large body of literature that praises the many benefits of goalsetting. Advocates of the practice have argued with his team's use of such evidence as news accounts to support his conclusion that goalsetting is widely overpraised.In a rebuttal (反驳) paper, Dr. Edwin Locke writes: "Goalsetting is not going away. Organizations cannot grow without being focused on their desired end results any more than an individual can grow without goals to provide a sense of purpose." But Schweitzer argues the "evidence" linking goalsetting and harmful behavior should be studied to help draw attention to issues that deserve attention and further investigation. "Even a few negative effects could be so large that they outweigh many positive effects," he says.The debate is likely to get heated on in future papers, and the practice of setting goals no doubt will continue. For now, though, the lesson seems to be to put more thought into setting goals."Goalsetting does help motivate people. My idea would be to combine that with careful management, a strong organizational culture, and make sure the goals that you use are going to be constructive and not significantly harmful to the organization," Schweitzer says.47. What does Maurice Schweitzer want to show by mentioning the example of Enron?A. Setting realistic goals can turn a failing business into success.B. Businesses are likely to succeed without realistic goals.C. Companies are certain to meet specific goals with financial rewards.D. Goals with financial rewards have strong motivational power.48. How did Sears' goalsetting affect its employees?A. They had to work more hours to increase their sales.B. They competed with one another to attract more customers.C. They turned to immoral practice to reach their goals.D. They improved their customer service on a companywide basis.49. The underlined words "runs counter to" (Paragraph 6)can be replaced by.A. agrees withB. goes againstC. fits in withD. applies to50. What is Edwin Locke's argument against Schweitzer?A. The practice of setting goals only helps people to develop.B. Goalsetting is of no use motivating people to accomplish their tasks.C. The positive effects of goalsetting outweigh its negative effects.D. Studying goalsetting can contribute to successful business practices.第二节(共10分)根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项.其中有两项为多余选项.21.(10分)Why are so many people afraid of failure? Quite simply because no one tells us how to fail so that failure becomes an experience that will lead to growth.(51)Most parents work hard at either preventing failure or protecting their children from the knowledge that they have failed. One way is to lower standards. A mother describes her child's hastily made table as "Perfect!" in spite of its uneven legs. Another way is to pin the blame on someone else. If John fails science, his teacher is unfair or stupid.The trouble with failure prevention ways is that they leave a child unequipped for life in the real world. The young need to learn that no one can be best at everything, no one can win all the time and that it's possible to enjoy a game even when you don't win. A child who is not invited to a birthday party, who does not make the honor roll on the baseball team, feels terrible, of course.(52)The young should be allowed to experience disappointment,and be helped to master it.Failure is never pleasurable. It hurts adults and children alike.(53)Step one is to ask "Why did I fail?"Resist the natural impulse (冲动) to blame someone else. Ask yourself what you did wrong and how you can improve. If someone else can help, don't be shy about inquiring.Success, which encourages repetition of old behavior, is not nearly as good a teacher as failure. You can learn froma disastrous party how to give a good one, from an ill chosen first house what to look for in a second.(54)After 12years of studying ballet a friend of mine went to an interview for a professional company. She was turned down. "Would further training help?" she asked. The ballet master shook his head. "You will never be adancer. You haven't the body for it."In such cases, the way to use failure is to take stock (清点存货,清理) bravely asking "What have I left? What else can I do?" My friend put away her toe shoes and moved into dance therapy, a field where she's both competent and useful.(55) Often there is a resurgence (复活) of energy yan awareness of new possibilities.A. Even a failure that seems definite can promote fresh thinking, a change of direction.B. However, it can make a positive contribution to your life once you learn to use it.C. You can also learn that failure is the mother of success.D. And we forget that failure is part of the human condition and that every person has the right to fail.E. Failure frees one to take risks because there's little to lose.F. So be strong and never lose heart in the face of failure.G. But parents should not offer a quick comfort, prize or say, "It doesn't matter" because it does.第三部分:书面表达(共两节,35分)第一节(15分)22.(15分)假设你是红星中学高三学生李华.你的英国朋友Jim 想了解中国人起名字的习惯,并请你帮他起一个中文名字.请给他写封信,内容包括:1.介绍中国人起名字的习惯;2.给他起一个中文名字;3.说明起此名字的理由.注意:1.词数不少于50;2.开头和结尾已给出,不计入总词数.Dear Jim,Yours,Li Hua.第二节(20分)23.(20分)假设你是红星中学高三学生李华.请根据以下四幅图的先后顺序,介绍在"传统文化进校园"活动中,向面人艺术家学习捏面人的过程,并以"A Day with a Craftsman"为题,给校刊"英语角"写一篇英文稿件.注意:词数不少于60.提示词:一个面团a piece of dough 面人 dough figurine.2018北京101中学高三(下)3月月考英语参考答案第一部分:知识运用(共两节,45分)第一节单项填空(共15小题;每小题1分,共15分)从每题所给的A、B、C、D四个选项中,选出最佳选项.1.【分析】图书馆还有一本这本书的复印本,你要去接吗?我宁愿去书店买一本.【解答】答案:A,考查指示代词的辨析,it用于特指,与上文所指名词是同一个;one用于泛指,指代同类事物中的一个,即同名不同物,第一个空格指代的是上文提到的那本复印本,因此用特指it,第二个空指代的是同类物中的一个,因此用one,故答案为A.【点评】本题考查代词的辨析,先区分所给代词的用法,再结合语境确定正确答案.2.【分析】我想约翰会成为一个好班长的,所以我投票选他.【解答】本题考查连词辨析.but但是;so因此;or或者;for因为.根据句意可知从句是结果,用so.故选:B.【点评】本题考查连词词义辨析,考生在平时的学习中应注意积累相应的词汇和搭配,并牢记其意思.在做题时,将词义和题干相结合,从语法、句子结构尤其是句意上去判断,句意通顺,符合逻辑,即正确答案.3.【分析】为了创建彩色的表格和图表,他下载了一个新的软件来帮忙.【解答】答案:D.根据he loaded a new software to help him(他下载了一个新的软件来帮忙)可以知道前面一句是目的状语,所以选择D To create.非谓语动词中只有to do可以做目的状语.故选:D.【点评】考查to do做目的状语.非谓语动词做状语时,to do只做目的,原因和出乎意料的结果状语.4.【分析】妈妈,我打包的午餐在哪里?在厨房.我给你做了两个三明治.【解答】答案:C.根据句意"在厨房.我给你做了两个三明治."可知应是已经做好,所以用现在完成时.故选:C.【点评】本题考查现在完成时.现在完成时(Present perfect)表示过去发生并且已经完成的动作对现在造成影响或后果,或过去某一时间开始并一直持续到现在并且有可能还会持续的动作或状态.做时态题时,在没有明显的标志词的情况下,要注意对句意的理解,要根据上下文,找到符合语境的答案.5.【分析】即使他患了癌症,杰克逊对自己的生活一直很乐观.【解答】答案A.even if"尽管,即使",引导让步状语从句.as long as"只要",引导条件状语从句.as if"仿佛,好像",引导方式状语从句.ever since自从…以来,引导时间状语从句.分析可知前后两句话之间是逻辑上的"让步"关系,再结合句子所表达的意思可知答案选A.【点评】本题考查从属连词的用法.连词的用法辨析,要注意分析主从句之间的逻辑关系,再确定相应的连词,同时注意不同的连词的语义及用法区别.6.【分析】提供食物、住房和工作是政府在自然灾害发生后首先要考虑的问题.【解答】答案 C分析句子成分可知,非谓语动词作主语,作主语的非谓语应用动名词或不定式,所以排除选项A、B,因为与其逻辑主语government是主动关系,所以排除选项D,故选C.【点评】本题考查非谓语中的动名词,非谓语做主语表示笼统概念时用动名词形式.本题的关键是分析句子结构,弄清句子成分.7.【分析】迈克,刚刚你看见查普曼先生在办公室吗?是的,他正在接受采访,而且看起来有些紧张.【解答】考查过去进行时的被动语态.he与interview之间是动宾关系,排除A项,根据上文中的just now,说明Chapman先生刚刚正在接受采访,用过去进行时的被动语态.故C项正确.故选:C.【点评】解答此类问题要了解各种时态的基本含义,并区别各种时态之间的差异,了解某些时态的特殊用法,然后结合语境选择正确答案.8.【分析】这位年轻女士,在做了几次尝试想修复她的手机,决定再试一次.【解答】考查现在分词的完成式.现在分词表示正在进行的伴随性动作,和句子主语是主谓关系,如果分词动作发生在主句谓语decided之前则要用完成时态的现在分词,故C项正确.其它三项不符合语境.故选:C.【点评】非谓语动词中的现在分词主要起形容词和副词的作用,在句中作定语、表语、补语或状语,弄清楚现在分词的构成,时态与语态,然后根据题意及上下文选择最合适的答案.9.【分析】那一定是次可怕的经历.是的.我被困在受损的车里,无法动弹.【解答】答案:A.根据上句must have been可知这是对过去事实的一种肯定猜测,下句描述的是事故的过程,为一般过去时,be stuck in意为"被困在某地";B项为现在完成时,强调对现在造成的影响和结果,D项为过去完成时,为过去的过去,本句只表示过去的事实,可排除;故选A.【点评】对于时态题要结合句意和句中的典型词,如must have done,last time等来判断时态的选用.10.【分析】媒体这个词的基本意义指的是我们常常称之为的报纸、杂志、电台和电视.【解答】答案是C.本题考查的是名词性从句的引导词.题干中空格后需要的是refer to的宾语从句,从句中动词call往往接双宾语,即call sb.sth.,所以句中缺少call的宾语;which在名词性从句中可以做宾语,但是表示选择,排除A;that在名词性从句中不担任成分,无意义;排除B;where是副词,不能做宾语,排除;what 引导名词性从句在句中做主语或宾语,故答案选择C.【点评】名词性从句考查的关键是连接词的选用和语序,因此,我们首先要搞清从句的性质,掌握各连接词的用法,在此基础上判断.此外,关注名词性从句用陈述语序.11.【分析】上个月东南亚的部分地区遭遇洪灾,灾民仍受其影响而痛苦不堪.【解答】答案:D考查非限制性定语从句的引导词,从句中effects和先行词floods构成了所有格的关系,因此使用充当定语的引导词whose来引导.故选:D.【点评】考查非限制性定语从句的引导词,应对句子成分进行分析,再对答案进行确定.12.【分析】句意:凭借着她从她的童年记忆中获取的故事,那个作家赢得了很多小孩子的心.【解答】【答案】D.根据分析句子成分可知with the rich stories _____from her childhood memories做状语,在with的复合结构中,非谓语动词用作宾语补足语,draw表示"汲取",和stories是被动关系,故用被动.可知选D.【点评】考查with的复合结构.draw的用法:vt.1.拔出,取出,抽出;2.提取,汲取,领取;3.引起,吸引.vi.1.移动,来临;2.打成平局,不分胜负n.1.抽奖,抽签;2.平局,不分胜负13.【分析】如果没有你的错误,你可能更容易通过驾驶考试.毕竟,你受过高质量的训练.【解答】答案:C. must have done.一定做某事.表示对过去事情的较有把握的推测,这时只能用在肯定句中,"肯定/必须已经干过…".can/couldhave done.本来能够做某事,而实际上未做.might havedone有时表示 "本来可以做的事而实际上没有做",含有 "劝告,责备"的语气.根据句意,C项正确.故选:C.【点评】本题考查情态动词+have done 的用法.must have done.一定做某事.表示对过去事情的较有把握的推测,这时只能用在肯定句中,"肯定/必须已经干过…".can/couldhave done.本来能够做某事,而实际上未做.ought to/should have done sth.过去本应该做某事而实际上并没有做.may havedone用于对过去动作的推测,表示 "或许;可能",多用于肯定句和否定句.might havedone有时表示 "本来可以做的事而实际上没有做",含有 "劝告,责备"的语气.14.【分析】我可以用支票付账吗?对不起,先生.我们酒店有规定,付账必须用现金.【解答】答案:A题干中the management rules of our hotel 酒店的管理规定,表示这是一种规章制度;shall与第二,第三人称连用,表示命令,警告或承诺,其中,规章制度或法律条文中要用shall表示命令.故选:A.【点评】情态动词的用法是英语中常考的语言点.通常考查的方式有虚拟和推测,本题考查的是情态动词shall 表示规章制度的特殊含义.学习时要注意积累.15.【分析】把毛巾挂在椅子的后面以便它能快点干.【解答】答案是A.本题主要考查介词辨析.over在…上方;搭挂在…的上面;(从…上面)越过;for对…来说;为了,因为;with具有;和;随着;和…一致;through穿过;自始至终,从头至尾;因为,由于;凭借;根据句意和介词搭配判断,用hang…over 表示"挂在…上面",本句中指把毛巾挂在椅子的后面,所以答案选择A.【点评】介词辨析要在掌握各介词的基本用法和固定搭配的基础上结合语境做出符合逻辑、常理的推测.第二节完形填空(每小题1.5分,共30分)阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项.16.【分析】本文是一篇夹叙夹议的文章,主要讲述了作者在和家人驱车旅游途中遇到了一位"看门人",作者为"看门人"买了一份午餐的故事.这个故事告诉我们要学会向他人表达我们的感谢并关爱他人.【解答】3640CBDAB 4145 DDABC 4650 BACDA 5155DABCC。

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如果您喜欢这份文档,欢迎下载!祝您成绩进步,学习愉快! 北京101中学2018届下学期高三年级3月月考数学试卷(文科)一、选择题:本大题共8小题,共40分。

1. 已知集合A={x| x (x-2)<0},B={x| lnx>0},则A B 是 A. {x| x>0}B. {x| x>2}C. {x | 1<x<2}D. {x | 0<x<2}2. 已知i 为虚数单位,设复数z 满足z+i=3,则|z|= A. 3B. 10C. 4D. 103. 某便利店记录了100天某商品的日需求量(单位:件),整理得下表:试估计该商品日平均需求量为 A. 16 B. 16.2C. 16.6D. 16.84. “sin α=22”是“cos2α=0”的 A. 充分而不必要条件 B. 必要而不充分条件 C. 充分必要条件D. 既不充分也不必要条件5. 下列函数中,是奇函数且在(0,1)内是减函数的是 ①f (x )=-x 3②f (x )=(21)|x|③f (x )=-sinx ④f (x )=||x ex A. ①③B. ①④C. ②③D. ③④6. 某四棱锥的三视图如图所示,网格纸上小正方形的边长为l ,则该四棱锥的体积为A.34B. 4C.324 D. 427. 阿波罗尼斯(约公元前262-190年)证明过这样一个命题:平面内到两定点距离之比为常数k (k>0且k ≠1)的点的轨迹是圆。

后人将这个圆称为阿氏圆。

若平面内两定点A ,B 间的距离为2,动点P 与A ,B 距离之比为2,当P ,A ,B 不共线时,△PAB 面积的最大值是A. 22B. 2C.322 D.32 8. 如图,△PAD 为等边三角形,四边形ABCD 为正方形,平面PAD ⊥平面ABCD 。

若点M 为平面ABCD 内的一个动点,且满足MP=MC ,则点M 在正方形ABCD 及其内部的轨迹为A. 椭圆的一部分B. 双曲线的一部分C. 一段圆弧D. 一条线段二、填空题:本大题共6小题。

共30分。

9. 执行如图所示的程序框图,输出S 的值为___________.10. 已知双曲线C 的中心在原点,对称轴为坐标轴,它的一个焦点与抛物线y 2=8x 的焦点重合,一条渐近线方程为x+y=0,则双曲线C 的方程是___________。

11. 已知菱形ABCD 的边长为2,∠BAD=60°,则AB ·BC =___________。

12. 若变量x ,y 满足约束条件⎪⎩⎪⎨⎧≤--≥+-≥-+,045,045,04y x y x y x 则x 2+y 2的最小值为___________。

13. 高斯说过,他希望能够借助几何直观来了解自然界的基本问题。

一位同学受到启发,按以下步骤给出了柯西不等式的“图形证明”:(1)左图矩形中白色区域面积等于右图矩形中白色区域面积; (2)左图阴影区域面积用a ,b ,c ,d 表示为__________;(3)右图中阴影区域的面积为BAD d c b a ∠++sin 2222;(4)则柯西不等式用字母a ,b ,c ,d 可以表示为(ac+bd )2≤(a 2+b 2)(c 2+d 2)。

请简单表述由步骤(3)到步骤(4)的推导过程:_____________。

14. 已知函数f (x )=⎩⎨⎧≥<<,,,0,sin ππx x x x x g (x )=f (x )-kx (k ∈R )。

①当k=l 时,函数g (x )有__________个零点;②若函数g (x )有三个零点,则k 的取值范围是___________。

三、解答题:本大题共6小题,共80分。

15. (本小题满分13分)已知函数f (x )=(sinx+cosx )2-cos2x 。

(I )求f (x )的最小正周期; (II )求证:当x ∈[0,2π]时,f (x )≥0。

16. (本小题满分13分)已知由实数构成的等比数列{a n }满足a 1=2,a 1+ a 3+ a 5=42。

(I )求数列{a n }的通项公式; (II )求a 2+ a 4+ a 6+…+ a 2n 。

17. (本小题满分13分)2017年,世界乒乓球锦标赛在德国的杜赛尔多夫举行。

整个比赛精彩纷呈,参赛选手展现出很高的竞技水平,为观众奉献了多场精彩对决。

图1(扇形图)和表1是其中一场关键比赛的部分数据统计。

两位选手在此次比赛中击球所使用的各项技术的比例统计如图1。

在乒乓球比赛中,接发球技术是指回接对方发球时使用的各种方法。

选手乙在比赛中的接发球技术统计如表1,其中的前4项技术统称反手技术,后3项技术统称为正手技术。

图1选手乙的接发球技术统计表技术反手拧球反手搓球反手拉球反手拨球正手搓球正手拉球正手挑球使用次数20 2 2 4 12 4 1得分率55% 50% 0% 75% 41.7% 75% 100%表1(I)观察图1,在两位选手共同使用的8项技术中,差异最为显著的是哪两项技术?(II)乒乓球接发球技术中的拉球技术包括正手拉球和反手拉球。

从表1统计的选手乙的所有拉球中任取两次,至少抽出一次反手拉球的概率是多少?(III)如果仅从表1中选手乙接发球得分率的稳定性来看(不考虑使用次数),你认为选手乙的反手技术更稳定还是正手技术更稳定?(结论不要求证明)18. (本小题满分14分)如图,在三棱柱ABC-A1B1C1中,底面ABC为正三角形,侧棱AA1⊥底面ABC。

已知D是BC 的中点,AB=AA1=2。

(I )求证:平面AB 1D ⊥平面BB 1C 1C ; (II )求证:A 1C ∥平面AB 1D ; (III )求三棱锥A 1-AB 1D 的体积。

19. (本小题满分14分)已知椭圆C :152222=+by b x (b>0)的一个焦点坐标为(2,0)。

(I )求椭圆C 的方程;(II )已知点E (3,0),过点(1,0)的直线l (与x 轴不重合)与椭圆C 交于M ,N 两点,直线ME 与直线x=5相交于点F ,试证明:直线FN 与x 轴平行。

20. (本小题满分13分)已知函数f (x )=xcos+a ,a ∈R 。

(I )求曲线y=f (x )在点x=2π处的切线的斜率; (II )判断方程f '(x )=0(f '(x )为f (x )的导数)在区间(0,1)内的根的个数,说明理由;(III )若函数F (x )=xsinx+cosx+ax 在区间(0,1)内有且只有一个极值点,求a 的取值范围。

参考答案一、选择题:本大题共8小题,共40分。

二、填空题:本大题共6小题,共30分。

三、解答题:本大题共6小题,共80分。

15. 解:(I )因为f (x )=sin 2x+cos 2x+sin2x-cos2x =1+sin2x-cos2x=2sin (2x-4π)+1。

所以函数f (x )的最小正周期为π。

…………………………7分 (II )由(I )可知,f (x )=2sin (2x-4π)+1。

当x ∈[0,2π]时,2x-4π∈[-4π,43π],sin (2x-4π)∈[-22,1],2sin (2x-4π)+1∈[0,2+l]。

当2x-4π=-4π,即x=0时,f (x )取了最小值0。

所以当x ∈[0,2π]时,f (x )≥0。

…13分16. 解:(I )由⎩⎨⎧=++=4225311a a a a 可得2(1+q 2+q 4)=42。

由数列{a n }各项为实数,解得q 2=4,q=±2。

所以数列{a n }的通项公式为a n =2n或a n =(-1)n-1·2n………………7分(II )当a n =2n时,a 2+ a 4+ a 6+…+ a 2n =3441)41(4=--n ·(4n-1);当a n =(-1)n-1·2n时,a 2+ a 4+ a 6+…+ a 2n =3441)41()4(=--⋅-n ·(1-4n)。

. . . . 13分 17. 解:(I )根据所给扇形图的数据可知,差异最为显著的是正手搓球和反手拧球两项技术。

……………2分(II )根据表1的数据可知,选手乙的反手拉球2次,分别记为A ,B ,正手拉球4次,分别记为a,b ,c,d 。

则从这六次拉球中任取两次,共15种结果,分别是:AB ,Aa,Ab ,Ac ,Ad,Ba ,Bb ,Bc,Bd,ab ,ac ,ad,bc,bd,cd 。

其中至少抽出一次反手拉球的共有9种,分别是:AB,Aa ,Ab ,Ac,Ad,Ba ,Bb ,Bc,Bd 。

则从表1统计的选手乙的所有拉球中任取两次,至少抽出一次反手拉球的概率53159==P 。

………………10分 (III )正手技术更稳定。

……………………13分18. (I )证明:由已知△ABC 为正三角形,且D 是BC 的中点,所以AD ⊥BC 。

因为侧棱AA 1⊥底面ABC ,AA 1∥BB 1,所以BB 1⊥底面ABC 。

又因为AD ⊂底面ABC ,所以BB 1⊥AD 。

而B 1B BC=B ,所以AD ⊥平面BB 1C 1C 。

因为AD ⊂平面AB 1D ,所以平面AB 1D ⊥平面BB 1C 1C 。

…5分(II )证明:连接A 1B ,设A 1B AB 1=E ,连接DE 。

由已知得,四边形A 1ABB 1为正方形,则E 为A 1B 的中点. 因为D 是BC 的中点,所以DE ∥A 1C 。

又因为DE ⊂平面AB 1D ,A 1C ⊄平面AB 1D , 所以A 1C ∥平面AB 1D 。

………………………10分(III )由(II )可知A 1C ∥平面AB 1D ,所以A 1与C 到平面AB 1D 的距离相等,所以D AB C D AB A V V 111--=。

由题设及AB=AA 1=2,得BB 1=2,且23=∆ACD S 。

所以ACD B D AB C V V --=11=31×33223311=⨯⨯=⨯∆BB S ACD ,所以三棱锥A 1-AB 1D 的体积为3311=-D AB A V 。

…………………………14分 19. 解:(I )由题意可知⎩⎨⎧==.5,222b a c 所以a 2=5,b 2=1。

所以椭圆C 的方程为225y x +=1 ………3分 (II )①当直线l 的斜率不存在时,此时MN ⊥x 轴。

设D (1,0),直线x=5与x 轴相交于点G ,易得点E (3,0)是点D (1,0)和点G (5,0)的中点,又因为|MD|=|DN|,所以|FG|=|DN|。

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