2011年北京市各城区二模单项选择及答案
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海淀区高三年级第二学期期末练习数 学 (理科) 2011.5一、选择题:1. 复数11i+在复平面上对应的点的坐标是A .(1,1) B. (1,1)- C. (1,1)-- D. (1,1)- 2. 已知全集R,U = 集合{}1,2,3,4,5A =,{|2}B x x =∈≥R ,下图中阴影部分所表示的集合为A {1} B. {0,1} C. {1,2} D. {0,1,2}3.函数21()log f x x x=-的零点所在区间A .1(0,)2 B. 1(,1)2C. (1,2)D. (2,3)4.若直线l 的参数方程为13()24x tt y t =+⎧⎨=-⎩为参数,则直线l 倾斜角的余弦值为A .45-B . 35-C . 35D . 455. 某赛季甲、乙两名篮球运动员各13场比赛得分情况用茎叶图表示如下:甲 乙 9 8 8 1 7 7 9 9 6 1 0 2 2 5 6 7 9 9 5 3 2 0 3 0 2 3 7 1 0 4 根据上图,对这两名运动员的成绩进行比较,下列四个结论中,不正确...的是 A .甲运动员得分的极差大于乙运动员得分的极差B .甲运动员得分的的中位数大于乙运动员得分的的中位数C .甲运动员的得分平均值大于乙运动员的得分平均值D .甲运动员的成绩比乙运动员的成绩稳定.可能是...该锥体的俯视图的是C主视图左视图1C :1212212=+b y a x (011>>b a )和椭圆2C :1222222=+b y a x (022>>b a )的焦点相同且12a a >.给出如下四个结论:① 椭圆1C 和椭圆2C 一定没有公共点; ②1122a b a b >; ③ 22212221b b a a -=-; ④1212a a b b -<-.其中,所有正确结论的序号是A .②③④B ①③④C .①②④ D. ①②③在一个正方体1111ABCD A BC D -中,P 为正方形1111A B C D 四边上的动点,O 为底面正方形ABCD 的中心,,M N 分别为,AB BC 中点,点Q 为平面ABCD 内一点,线段1D Q 与OP 互相平分,则满足MQ MN λ=的实数λ的值有A. 0个B. 1个 C 2个 D. 3个非选择题(共110分)二、填空题:本大题共6小题,每小题5分,共30分.9.点(,)P x y 在不等式组2,,2y x y x x ≤⎧⎪≥-⎨⎪≤⎩表示的平面区域内,则z x y =+的最大值为_______.10.运行如图所示的程序框图,若输入4n =,则输出S 的值为 . 11.若4234512345(1)x mx a x a x a x a x a x -=++++, 其中26a =-,则实数m 的值为 ;12345a a a a a ++++的值为 .12.如图,已知O 的弦AB 交半径OC 于点D ,若3AD =,2BD =,且D 为OC 的中点,则CD 的长为 .{}n a 满足1,a t =,120n n a a +-+= (,)t n ∈∈**N N ,记数列{}n a 的前n 项和的最大值为()f t ,则()f t = .A1D 1A 1C 1B DC BOPNM Q已知函数sin ()xf x x=(1)判断下列三个命题的真假:①()f x 是偶函数;②()1f x < ;③当32x π=时,()f x 取得极小值. 其中真命题有____________________;(写出所有真命题的序号) (2)满足()()666n n f f πππ<+的正整数n 的最小值为___________. 三、解答题: 本大题共6小题,共80分.解答应写出文字说明, 演算步骤或证明过程.15. (本小题共13分)已知函数2()cos cos f x x x x ωωω= (0)ω>的最小正周期为π.(Ⅰ)求2()3f π的值;(Ⅱ)求函数()f x 的单调区间及其图象的对称轴方程. 16.(本小题共13分)某商场一号电梯从1层出发后可以在2、3、4层停靠.已知该电梯在1层载有4位乘客,假设每位乘客在2、3、4层下电梯是等可能的.(Ⅰ) 求这4位乘客中至少有一名乘客在第2层下电梯的概率;(Ⅱ) 用X 表示4名乘客在第4层下电梯的人数,求X 的分布列和数学期望.17.(本小题共14分)如图,四棱锥P ABCD -的底面是直角梯形,//AB CD ,AB AD ⊥,PAB ∆和PAD ∆是两个边长为2的正三角形,4DC =,O 为BD 的中点,E 为PA 的中点.(Ⅰ)求证:PO ⊥平面ABCD ;(Ⅱ)求证://OE 平面PDC ;(Ⅲ)求直线CB 与平面PDC 所成角的正弦值.18. (本小题共14分)已知函数221()()ln 2f x ax x x ax x =--+.()a ∈R . (I )当0a =时,求曲线()y f x =在(e,(e))f 处的切线方程(e 2.718...=); (II )求函数()f x 的单调区间. 19.(本小题共13分)在平面直角坐标系xOy 中,设点(,),(,4)P x y M x -,以线段PM 为直径的圆经过ADOCPBE原点O .(Ⅰ)求动点P 的轨迹W 的方程;(Ⅱ)过点(0,4)E -的直线l 与轨迹W 交于两点,A B ,点A 关于y 轴的对称点为'A ,试判断直线'A B 是否恒过一定点,并证明你的结论.20. (本小题共13分)对于数列12n A a a a :,,,,若满足{}0,1(1,2,3,,)i a i n ∈=⋅⋅⋅,则称数列A 为“0-1数列”.定义变换T ,T 将“0-1数列”A 中原有的每个1都变成0,1,原有的每个0都变成1,0. 例如A :1,0,1,则():0,1,1,0,0,1.T A 设0A 是“0-1数列”,令1(),k k A T A -=12k = ,,3,.(Ⅰ) 若数列2A :1,0,0,1,0,1,1,0,1,0,0,1. 求数列10,A A ;(Ⅱ) 若数列0A 共有10项,则数列2A 中连续两项相等的数对至少有多少对?请说明理由; (Ⅲ)若0A 为0,1,记数列k A 中连续两项都是0的数对个数为k l ,1,2,3,k =⋅⋅⋅.求k l 关于k 的表达式.海淀区高三年级第二学期期末练习数 学(理)答案及评分参考 2011.5选择题 (共40分)一、选择题(本大题共8小题,每小题5分,共40分)非选择题 (共110分)二、填空题(本大题共6小题,每小题5分. 共30分.有两空的题目,第一空3分,第二空2分)9. 6 10. 11 11.32, 11613. 222, (4(1), (4t tt t t ⎧+⎪⎪⎨+⎪⎪⎩为偶数)为奇数) 14. ①② , 9 三、解答题(本大题共6小题,共80分) 15. (共13分) 解:(Ⅰ)1()(1cos 2)22f x x x =+ωω………………………2分1sin(2)26x =++πω, …………………………3分 因为()f x 最小正周期为π,所以22ππω=,解得1ω=, …………………………4分所以1()sin(2)62πf x x =++, ………………………… 5分 所以21()32πf =-. …………………………6分 (Ⅱ)分别由222,()262k x k k Z πππππ-≤+≤+∈,3222,()262k x k k Z πππππ+≤+≤+∈可得,()36k x k k Z ππππ-≤≤+∈,2,().63k x k k Z ππππ+≤≤+∈………………8分所以,函数()f x 的单调增区间为[,],()36k k k Z ππππ-+∈; ()f x 的单调减区间为2[,],().63k k k Z ππππ++∈………………………10分 由2,(62ππx k πk Z +=+∈)得,()26k πx πk Z =+∈. 所以,()f x 图象的对称轴方程为()26k πx πk Z =+∈. …………………………13分16.(共13分)解:(Ⅰ) 设4位乘客中至少有一名乘客在第2层下电梯的事件为A , …………………………1分由题意可得每位乘客在第2层下电梯的概率都是13, ……………………………3分 则4265()1()1381P A P A ⎛⎫=-=-=⎪⎝⎭ .……………………………6分(Ⅱ) X 的可能取值为0,1,2,3,4, …………………………7分 由题意可得每个人在第4层下电梯的概率均为13,且每个人下电梯互不影响, 所以,1(4,3X B . …………………………………11分14()433E X =⨯=. ………………………………13分17.(共14分)(Ⅰ)证明:设F 为DC 的中点,连接BF ,则DF AB = ∵AB AD ⊥,AB AD =,//AB DC , ∴四边形ABFD 为正方形, ∵O 为BD 的中点, ∴O 为,AF BD 的交点,∵2PD PB ==,∴PO BD ⊥, ………………………………..2分∵BD ==∴PO=12AO BD == 在三角形PAO 中,2224PO AO PA +==,∴PO AO ⊥,……………………………4分 ∵AO BD O = ,∴PO ⊥平面ABCD ; ……………………………5分 (Ⅱ)方法1:连接PF ,∵O 为AF 的中点,E 为PA 中点, ∴//OE PF ,∵OE ⊄平面PDC ,PF ⊂平面PDC ,∴//OE 平面PDC . ……………………………9分方法2:由(Ⅰ)知PO ⊥平面ABCD ,又AB AD ⊥,所以过O 分别做,AD AB 的平行线,以它们做,x y 轴,以OP 为z 轴建立如图所示的空间直角坐标系, 由已知得:(1,1,0)A --,(1,1,0)B -,(1,1,0)D -(1,1,0)F ,(1,3,0)C,P ,11(,22E --,则11(,22OE =--,(1,1,PF =,(1,1,PD =-,(1,3,PC = .A DO CPB EF∴12OE PF =-∴//OE PF∵OE ⊄平面PDC ,PF ⊂平面PDC ,∴//OE 平面PDC ; …………………………………9分(Ⅲ) 设平面PDC 的法向量为111(,,)n x y z =,直线CB 与平面PDC 所成角θ,则00n PC n PD ⎧⋅=⎪⎨⋅=⎪⎩,即111111300x y x y ⎧+-=⎪⎨-=⎪⎩,解得1110y x =⎧⎪⎨=⎪⎩,令11z =,则平面PDC的一个法向量为)n = ,又(2,2,0)CB =--则sin cos ,θn CB =<>==, ∴直线CB 与平面PDC所成角的正弦值为3. ………………………………………14分18. (共14分)解:(I )当0a =时,()ln f x x x x =-,'()ln f x x =-, ………………………2分 所以()0f e =,'()1f e =-, ………………………4分 所以曲线()y f x =在(e,(e))f 处的切线方程为y x e =-+.………………………5分 (II )函数()f x 的定义域为(0,)+∞21'()()(21)ln 1(21)ln f x ax x ax x ax ax x x=-+--+=-,…………………………6分①当0a ≤时,210ax -<,在(0,1)上'()0f x >,在(1,)+∞上'()0f x <所以()f x 在(0,1)上单调递增,在(1,)+∞上递减; ……………………………………………8分②当102a <<时,在(0,1)和1(,)2a +∞上'()0f x >,在1(1,)2a上'()0f x < 所以()f x 在(0,1)和1(,)2a +∞上单调递增,在1(1,)2a上递减;………………………10分③当12a =时,在(0,)+∞上'()0f x ≥且仅有'(1)0f =,所以()f x 在(0,)+∞上单调递增; ……………………………………………12分④当12a >时,在1(0,)2a 和(1,)+∞上'()0f x >,在1(,1)2a上'()0f x < 所以()f x 在1(0,)2a 和(1,)+∞上单调递增,在1(,1)2a上递减……………………………14分19.(共13分) 解:(I )由题意可得OP OM ⊥, ……………………………2分所以O POM⋅= ,即(,xy x -= ………………………………4分即240x y -=,即动点P 的轨迹W 的方程为24x y = ……………5分 (II )设直线l 的方程为4y kx =-,1122(,),(,)A x y B x y ,则11'(,)A x y -. 由244y kx x y=-⎧⎨=⎩消y整理得24160x kx -+=, ………………………………6分则216640k ∆=->,即|k >. ………………………………7分12124,16x x k x x +==. …………………………………9分直线212221':()y y A B y y x x x x --=-+212221222212212222121222112()1()4()41444 y 44y y y x x y x x x x y x x x x x x x x x x y x x x x x x x -∴=-++-∴=-++--∴=-+-∴=+……………………………………12分即2144x x y x -=+ 所以,直线'A B恒过定点(0,4). ……………………………………13分20. (共13分)解:(Ⅰ)由变换T 的定义可得1:0,1,1,0,0,1A …………………………………2分0:1,0,1A (4)分(Ⅱ) 数列0A 中连续两项相等的数对至少有10对 …………………………………5分证明:对于任意一个“0-1数列”0A ,0A 中每一个1在2A 中对应连续四项1,0,0,1,在0A 中每一个0在2A 中对应的连续四项为0,1,1,0,因此,共有10项的“0-1数列”0A 中的每一个项在2A 中都会对应一个连续相等的数对, 所以2A 中至少有10对连续相等的数对. …………………………………………………………8分 (Ⅲ) 设k A 中有k b 个01数对,1k A +中的00数对只能由k A 中的01数对得到,所以1k k l b +=,1k A +中的01数对有两个产生途径:①由k A 中的1得到; ②由k A 中00得到,由变换T 的定义及0:0,1A 可得k A 中0和1的个数总相等,且共有12k +个,所以12k k k b l +=+, 所以22k k k l l +=+,由0:0,1A 可得1:1,0,0,1A ,2:0,1,1,0,1,0,0,1A 所以121,1l l ==, 当3k ≥时,若k 为偶数,222k k k l l --=+4242k k k l l ---=+ 2422l l =+上述各式相加可得122421(14)11222(21)143k k kk l ---=++++==-- ,经检验,2k =时,也满足1(21)3k k l =-若k 为奇数,222k k k l l --=+ 4242k k k l l ---=+ 312l l =+上述各式相加可得12322(14)112221(21)143k k kk l ---=++++=+=+- ,经检验,1k =时,也满足1(21)3k k l =+所以1(21),31(21),3kk k k l k ⎧+⎪⎪=⎨⎪-⎪⎩为奇数为偶数…………………………………………………………………………………..13分说明:其它正确解法按相应步骤给分.北京市西城区2011年高三二模试卷数学(理科) 2011.5第Ⅰ卷(选择题 共40分)一、选择题:本大题共8小题,每小题5分,共40分. 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{0,1}A =,{1,0,3}B a =-+,且A B ⊆,则a 等于 (A )1(B )0(C )2- (D )3-2.已知i 是虚数单位,则复数23z i+2i 3i =+所对应的点落在 (A )第一象限 (B )第二象限 (C )第三象限(D )第四象限3.在ABC ∆中,“0AB BC ⋅>”是“ABC ∆为钝角三角形”的(A )充分不必要条件 (B )必要不充分条件 (C )充要条件(D )既不充分又不必要条件4.已知六棱锥P ABCDEF -的底面是正六边形,PA ⊥平面ABC .则下列结论不正确...的是 (A )//CD 平面PAF (B )DF ⊥平面PAF (C )//CF 平面PAB (D )CF ⊥平面PAD5.双曲线22221x y a b-=的渐近线与圆22(2)1x y +-=相切,则双曲线离心率为(A(B(C )2(D )36.函数sin()(0)y x ϕϕ=π+>的部分图象如右图所示,设P 是图象的最高点,,A B 是图象与x 轴的交点,则tan APB ∠=(A )10 (B )8 (C )87(D )77.已知数列{}n a 的通项公式为13n a n =-,那么满足119102k k k a a a +++++= 的整数k (A )有3个 (B )有2个 (C )有1个(D )不存在8.设点(1,0)A ,(2,1)B ,如果直线1ax by +=与线段AB 有一个公共点,那么22a b +(A )最小值为15 (B)最小值为5 (C )最大值为15(D)最大值为5第Ⅱ卷(非选择题 共110分)二、填空题:本大题共6小题,每小题5分,共30分. 9.在ABC ∆中,若2B A =,:a b =A =_____. 10.在521()x x+的展开式中,2x 的系数是_____. 11.如图,AB 是圆O 的直径,P 在AB 的延长线上,PD切圆O 于点C .已知圆O2OP =,则PC =______;ACD ∠的大小为______.12.在极坐标系中,点(2,)2A π关于直线:cos 1l ρθ=的对称点的一个极坐标为_____.13.定义某种运算⊗,a b ⊗的运算原理如右图所示.设()(0)(2)f x x x x =⊗-⊗. 则(2)f =______;()f x 在区间[2,2]-上的最小值为______.14.数列{}n a 满足11a =,11n n n a a n λ+-=+,其中λ∈R , 12n = ,,.①当0λ=时,20a =_____;②若存在正整数m ,当n m >时总有0n a <,则λ的取值范围是_____.三、解答题:本大题共6小题,共80分. 解答应写出必要的文字说明、证明过程或演算步骤.15.(本小题满分13分)已知函数cos 2()sin()4x f x x π=+.(Ⅰ)求函数()f x 的定义域; (Ⅱ)若4()3f x =,求s i n 2x 的值.16.(本小题满分13分)如图,已知菱形ABCD 的边长为6,60BAD ∠=,AC BD O = .将菱形ABCD 沿对角线AC折起,使BD =B ACD -.(Ⅰ)若点M 是棱BC 的中点,求证://OM 平面ABD ; (Ⅱ)求二面角A B D O --的余弦值;(Ⅲ)设点N 是线段BD 上一个动点,试确定N点的位置,使得CN =你的结论.17.(本小题满分13分)甲班有2名男乒乓球选手和3名女乒乓球选手,乙班有3名男乒乓球选手和1名女乒乓球选手,学校计划从甲乙两班各选2名选手参加体育交流活动.(Ⅰ)求选出的4名选手均为男选手的概率.(Ⅱ)记X 为选出的4名选手中女选手的人数,求X 的分布列和期望.18.(本小题满分14分)已知函数()(1)e (0)xa f x x x=->,其中e 为自然对数的底数.(Ⅰ)当2a =时,求曲线()y f x =在(1,(1))f 处的切线与坐标轴围成的面积; (Ⅱ)若函数()f x 存在一个极大值点和一个极小值点,且极大值与极小值的积为5e ,求a 的值.19.(本小题满分14分)已知椭圆2222:1x y M a b +=(0)a b >>,且椭圆上一点与椭圆的两个焦点构成的三角形周长为246+.M(Ⅰ)求椭圆M 的方程;(Ⅱ)设直线l 与椭圆M 交于,A B 两点,且以AB 为直径的圆过椭圆的右顶点C , 求ABC ∆面积的最大值.20.(本小题满分13分)若m A A A ,,,21 为集合2}(,,2,1{≥=n n A 且)n ∈*N 的子集,且满足两个条件: ①12m A A A A = ;②对任意的A y x ⊆},{,至少存在一个},,3,2,1{m i ∈,使}{},{x y x A i = 或}{y . 则称集合组m A A A ,,,21 具有性质P .如图,作n 行m 列数表,定义数表中的第k 行第l 列的数为⎩⎨⎧∉∈=)(0)(1l l kl A k A k a .(Ⅰ)当4n =时,判断下列两个集合组是否具有性质P ,如果是请画出所对应的表格,如果不是请说明理由;集合组1:123{1,3},{2,3},{4}A A A ===; 集合组2:123{2,3,4},{2,3},{1,4}A A A ===. (Ⅱ)当7n =时,若集合组123,,A A A 具有性质P ,请先画出所对应的7行3列的一个数表,再依此表格分别写出集合123,,A A A ;(Ⅲ)当100n =时,集合组12,,,t A A A 是具有性质P 且所含集合个数最小的集合组,求t 的值及12||||||t A A A ++ 的最小值.(其中||i A 表示集合i A 所含元素的个数)北京市西城区2011年高三二模试卷参考答案及评分标准数学(理科) 2011.5一、选择题:本大题共8小题,每小题5分,共40分.题号1 2 3 4 5 6 7 8 答案C C AD C B B A二、填空题:本大题共6小题,每小题5分,共30分.9. 30 10. 5 11.1;7512.)4π(或其它等价写法) 13.2-;6- 14.120;(21,2),k k k -∈*N . 注:11、13、14题第一问2分,第二问3分.三、解答题:本大题共6小题,共80分.若考生的解法与本解答不同,正确者可参照评分标准给分.15.(本小题满分13分) 解:(Ⅰ)由题意,sin()04x π+≠, ………………2分 所以()4x k k π+≠π∈Z , ………………3分 所以()4x k k π≠π-∈Z , ………………4分函数()f x 的定义域为{x x ≠,4k k ππ-∈Z }. ………………5分(Ⅱ)c o s 2c o s 2()sin()sin cos cos sin444x x f x x x x ==πππ++ ………………7分2sin cos xx x=+ ………………8分22sin )sin )sin cos x x x x x x-==-+. ………………10分因为4()3f x =,所以cos sin 3x x -=. ………………11分 所以,2sin 21(cos sin )x x x =-- ………………12分81199=-= . ………………13分16.(本小题满分13分)(Ⅰ)证明:因为点O 是菱形ABCD 的对角线的交点,所以O 是AC 的中点.又点M 是棱BC 的中点,所以OM 是ABC ∆的中位线,//OM AB . ………………1分因为OM ⊄平面ABD ,AB ⊂平面ABD ,所以//OM 平面ABD . ………………3分 (Ⅱ)解:由题意,3OB OD ==,因为BD =所以90BOD ∠=,OB OD ⊥. ………………4分 又因为菱形ABCD ,所以OB AC ⊥,OD AC ⊥. 建立空间直角坐标系O xyz -,如图所示.(0,3,0),A D (0,0,3)B .所以((AB AD =-=-………………6分设平面ABD 的法向量为n =(,,)x y z ,则有0,0AB AD ⎧⋅=⎪⎨⋅=⎪⎩n n即:30,30z y ⎧-+=⎪⎨-+=⎪⎩令1x =,则y z ==n=(1. ………………7分 因为,AC OB AC OD ⊥⊥,所以AC ⊥平面BOD . 平面BOD 的法向量与AC 平行,所以平面BOD 的法向量为0(1,0,0)=n . ………………8分000cos ,⋅〈〉===n n n n n n 因为二面角A B D O --是锐角,所以二面角A B D O --的余弦值为. ……………9分 (Ⅲ)解:因为N 是线段BD 上一个动点,设111(,,)N x y z ,BN BD λ=,则111(,,3)(0,3,3)x y z λ-=-,所以1110,3,33x y z λλ===-, ……………10分则(0,3,33)N λλ-,,33)CN λλ=-,由CN ==,即29920λλ-+=,…………11分解得13λ=或3λ=, ……………12分 所以N 点的坐标为(0,2,1)或(0,1,2). ……………13分(也可以答是线段BD 的三等分点,2BN ND = 或2BN ND =)17.(本小题满分13分)解:(Ⅰ)事件A 表示“选出的4名选手均为男选手”.由题意知232254()C P A C C = ………………3分11110220=⨯=. ………………5分 (Ⅱ)X 的可能取值为0,1,2,3. ………………6分23225431(0)10620C P X C C ====⨯, ………………7分11212333225423337(1)10620C C C C P X C C +⨯⨯+====⨯, ………………9分 21332254333(3)10620C C P X C C ⨯====⨯, ………………10分 (2)1(0)(1)(3)P X P X P X P X ==-=-=-=920=. ………………11分 X 的分布列:X0 1 2 3 P120 720 920320………………12分179317()01232020202010E X =⨯+⨯+⨯+⨯=. ………………13分18、(本小题满分14分)解:(Ⅰ)22()e xx ax a f x x -+'=, ………………3分 当2a =时,2222()e xx x f x x -+'=, 12122(1)e e 1f -+'=⨯=,(1)e f =-, 所以曲线()y f x =在(1,(1))f 处的切线方程为e 2e y x =-, ………………5分 切线与x 轴、y 轴的交点坐标分别为(2,0),(0,2e)-, ………………6分 所以,所求面积为122e 2e 2⨯⨯-=. ………………7分 (Ⅱ)因为函数()f x 存在一个极大值点和一个极小值点,所以,方程20x ax a -+=在(0,)+∞内存在两个不等实根, ………………8分则240,0.a a a ⎧∆=->⎨>⎩ ………………9分 所以4a >. ………………10分 设12,x x 为函数()f x 的极大值点和极小值点,则12x x a +=,12x x a =, ………………11分 因为,512()()e f x f x =, 所以,1251212e e e x x x a x a x x --⨯=, ………………12分 即1225121212()e e x x x x a x x a x x +-++=,225e e a a a a a -+=,5e e a =, 解得,5a =,此时()f x 有两个极值点,所以5a =. ………………14分19.(本小题满分14分)解:(Ⅰ)因为椭圆M 上一点和它的两个焦点构成的三角形周长为246+,所以24622+=+c a , ……………1分又椭圆的离心率为3,即3c a =,所以3c a =, ………………2分所以3a =,c =………………4分所以1b =,椭圆M 的方程为1922=+y x . ………………5分 (Ⅱ)方法一:不妨设BC 的方程(3),(0)y n x n =->,则AC 的方程为)3(1--=x ny . 由22(3),19y n x x y =-⎧⎪⎨+=⎪⎩得0196)91(2222=-+-+n x n x n , ………………6分 设),(11y x A ,),(22y x B ,因为222819391n x n -=+,所以19327222+-=n n x , ………………7分同理可得2219327nn x +-=, ………………8分所以1961||22++=n n BC ,222961||nn n n AC ++=, ………………10分 964)1()1(2||||212+++==∆n n n n AC BC S ABC , ………………12分 设21≥+=n n t ,则22236464899t S t t t ==≤++, ………………13分当且仅当38=t 时取等号,所以ABC ∆面积的最大值为83. ………………14分方法二:不妨设直线AB 的方程x ky m =+.由22,1,9x ky m x y =+⎧⎪⎨+=⎪⎩ 消去x 得222(9)290k y kmy m +++-=, ………………6分 设),(11y x A ,),(22y x B ,则有12229km y y k +=-+,212299m y y k -=+. ① ………………7分因为以AB 为直径的圆过点C ,所以 0CA CB ⋅=.由 1122(3,),(3,)CA x y CB x y =-=-,得 1212(3)(3)0x x y y --+=. ………………8分 将1122,x ky m x ky m =+=+代入上式,得 221212(1)(3)()(3)0k y y k m y y m ++-++-=.将 ① 代入上式,解得 125m =或3m =(舍). ………………10分 所以125m =(此时直线AB 经过定点12(,0)5D ,与椭圆有两个交点),所以121||||2ABC S DC y y ∆=-12==……………12分设211,099t t k =<≤+,则ABC S ∆=所以当251(0,]2889t =∈时,ABC S ∆取得最大值83. ……………14分20.(本小题满分13分)(Ⅰ)解:集合组1具有性质P . ………………1分所对应的数表为: (3)分集合组2不具有性质P . ………………4分 因为存在{{2,3}1,2,3,4}⊆,有123{2,3}{2,3},{2,3}{2,3},{2,3}A A A ===∅ , 与对任意的A y x ⊆},{,都至少存在一个{1,2,3}i ∈,有}{},{x y x A i = 或}{y 矛盾,所以集合组123{2,3,4},{2,3},{1,4}A A A ===不具有性质P . ………………5分(Ⅱ)……………7分123{3,4,5,7},{2,4,6,7},{1,5,6,7}A A A ===. ………………8分 (注:表格中的7行可以交换得到不同的表格,它们所对应的集合组也不同) (Ⅲ)设12,,,t A A A 所对应的数表为数表M ,因为集合组12,,,t A A A 为具有性质P 的集合组, 所以集合组12,,,t A A A 满足条件①和②, 由条件①:12t A A A A = ,可得对任意x A ∈,都存在{1,2,3,,}i t ∈ 有i A x ∈, 所以1=xi a ,即第x 行不全为0,所以由条件①可知数表M 中任意一行不全为0. ………………9分1 1 1 1 1 1 1 1 1 11 1 0 0 0 00 0 0 0 0 01 1 0 0 00 1 1 0 0 1由条件②知,对任意的A y x ⊆},{,都至少存在一个{1,2,3,,}i t ∈ ,使}{},{x y x A i = 或}{y ,所以yi xi a a ,一定是一个1一个0,即第x 行与第y 行的第i 列的两个数一定不同.所以由条件②可得数表M 中任意两行不完全相同. ………………10分 因为由0,1所构成的t 元有序数组共有2t个,去掉全是0的t 元有序数组,共有21t-个,又因数表M 中任意两行都不完全相同,所以10021t≤-,所以7t ≥.又7t =时,由0,1所构成的7元有序数组共有128个,去掉全是0的数组,共127个,选择其中的100个数组构造100行7列数表,则数表对应的集合组满足条件①②,即具有性质P .所以7t =. ………………12分 因为12||||||t A A A +++ 等于表格中数字1的个数,所以,要使12||||||t A A A +++ 取得最小值,只需使表中1的个数尽可能少, 而7t =时,在数表M 中,1的个数为1的行最多7行;1的个数为2的行最多2721C =行; 1的个数为3的行最多3735C =行; 1的个数为4的行最多4735C =行;因为上述共有98行,所以还有2行各有5个1,所以此时表格中最少有722133543552304+⨯+⨯+⨯+⨯=个1.所以12||||||t A A A +++ 的最小值为304. ………………14分北京市东城区2010-2011学年第二学期高三综合练习数学 (理科)学校_____________班级_______________姓名______________考号___________ 本试卷分第Ⅰ卷和第Ⅱ卷两部分,第Ⅰ卷1至2页,第Ⅱ卷3至5页,共150分。
北京市西城区2011年高三二模试卷数学(文科) 2011.5第Ⅰ卷(选择题 共40分)一、选择题:本大题共8小题,每小题5分,共40分. 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{0,1}A =,{1,0,3}B a =-+,且A B ⊆,则a 等于 (A )1(B )0(C )2- (D )3-2.已知i 是虚数单位,则复数2z 12i+3i =+所对应的点落在 (A )第一象限 (B )第二象限 (C )第三象限(D )第四象限4.在ABC ∆中,“0AB BC ⋅=”是“ABC ∆为直角三角形”的(A )充分不必要条件 (B )必要不充分条件 (C )充要条件(D )既不充分又不必要条件5.一个几何体的三视图如图所示,则其体积等于(A )2 (B )1 (C )16(D )23正(主)视图俯视图侧(左)视图6.函数sin ()y x x =π∈R 的部分图象如图所示,设O 为坐标原点,P 是图象的最高点,B 是图象与x 轴的交点,则tan OPB ∠=(A )10(B )8(C )87(D )77.若2a >,则函数3()33f x x ax =-+在区间(0,2)上零点的个数为 (A )0个 (B )1个 (C)2个(D )3个8.已知点(1,0),(1,0)A B -及抛物线22y x =,若抛物线上点P 满足PA m PB =,则m 的最大值为 (A )3(B )2(C (D第Ⅱ卷(非选择题 共110分)二、填空题:本大题共6小题,每小题5分,共30分. 9. 已知}{n a 为等差数列,341a a +=,则其前6项之和为_____.10.已知向量(1=a ,+=a b ,设a 与b 的夹角为θ,则θ=_____. 11.在ABC ∆中,若2B A =,:a b =A =_____.12.平面上满足约束条件2,0,60x x y x y ≥⎧⎪+≤⎨⎪--≤⎩的点(,)x y 形成的区域为D ,则区域D 的面积为________;设区域D 关于直线21y x =-对称的区域为E ,则区域D 和区域E 中距离 最近的两点的距离为________.13.定义某种运算⊗,a b ⊗的运算原理如右图所示.则0(1)⊗-=______;设()(0)(2)f x x x x =⊗-⊗.则(1)f =______. 14.数列{}n a 满足11a =,11n n n a a n λ+-=+,其中λ∈R ,12n = ,,.给出下列命题:①λ∃∈R ,对于任意i ∈*N ,0i a >;②λ∃∈R ,对于任意2()i i ≥∈*N ,10i i a a +<;③λ∃∈R ,m ∈*N ,当i m >(i ∈*N )时总有0i a <.其中正确的命题是______.(写出所有正确命题的序号)三、解答题:本大题共6小题,共80分. 解答应写出必要的文字说明、证明过程或演算步骤.15.(本小题满分13分)已知函数1)43()sin x f x xπ+-=. (Ⅰ)求函数()f x 的定义域;(Ⅱ)若()2f x =,求s i n 2x 的值.16.(本小题满分13分)如图,菱形ABCD 的边长为6,60BAD ∠=,AC BD O = .将菱形ABCD 沿对角线AC 折起,得到三棱锥B ACD -,点M 是棱BC的中点,DM =(Ⅰ)求证://OM 平面ABD ; (Ⅱ)求证:平面ABC ⊥平面M D O ; (Ⅲ)求三棱锥M A B D -的体积.17.(本小题满分13分)由世界自然基金会发起的“地球1小时”活动,已发展成为最有影响力的环保活动之一,今年的参与人数再创新高.然而也有部分公众对该活动的实际效果与负面影响提出了疑问.对此,某新闻媒体进行了网上调查,所有参与调查的人中,持“支持”、“保留”和“不支持”态度的人数如下表所示:(Ⅰ)在所有参与调查的人中,用分层抽样的方法抽取n 个人,已知从“支持”态度的ABCCMOD人中抽取了45人,求n 的值;(Ⅱ)在持“不支持”态度的人中,用分层抽样的方法抽取5人看成一个总体,从这5人中任意选取2人,求至少有1人20岁以下的概率;(Ⅲ)在接受调查的人中,有8人给这项活动打出的分数如下:9.4,8.6,9.2,9.6,8.7,9.3,9.0,8.2.把这8个人打出的分数看作一个总体,从中任取1个数,求该数与总体平均数之差的绝对值超过0.6的概率.18.(本小题满分14分)设函数()e x f x =,其中e 为自然对数的底数. (Ⅰ)求函数()()e g x f x x =-的单调区间;(Ⅱ)记曲线()y f x =在点00(,())P x f x (其中00x <)处的切线为l ,l 与x 轴、y 轴所围成的三角形面积为S ,求S 的最大值.19.(本小题满分14分)已知椭圆22221x y a b +=(0a b >>)的焦距为2.(Ⅰ)求椭圆方程;(Ⅱ)设过椭圆顶点(0,)B b ,斜率为k 的直线交椭圆于另一点D ,交x 轴于点E ,且,,BD BE DE 成等比数列,求2k 的值.20.(本小题满分13分)若函数)(x f 对任意的x ∈R ,均有)(2)1()1(x f x f x f ≥++-,则称函数)(x f 具有性质P .(Ⅰ)判断下面两个函数是否具有性质P ,并说明理由.①(1)x y a a =>; ②3y x =.(Ⅱ)若函数)(x f 具有性质P ,且(0)()0f f n ==(2,n >n ∈*N ),求证:对任意{1,2,3,,1}i n ∈- 有()0f i ≤;(Ⅲ)在(Ⅱ)的条件下,是否对任意[0,]x n ∈均有0)(≤x f .若成立给出证明,若不成立给出反例.北京市西城区2011年高三二模试卷参考答案及评分标准数学(文科) 2011.5一、选择题:本大题共8小题,每小题5分,共40分.题号 1 2 3 4 56 7 8 答案C B C A DBBC二、填空题:本大题共6小题,每小题5分,共30分.9. 3 10. 120 11. 3012. 1;13. 1;1- 14. ①③注:12、13题第一问2分,第二问3分.14题只选出一个正确的命题给2分,选出错误的命题即得0分.三、解答题:本大题共6小题,共80分.若考生的解法与本解答不同,正确者可参照评分标准给分.15.(本小题满分13分) 解:解:(Ⅰ)由题意,sin 0x ≠, ……………2分所以,()x k k ≠π∈Z . ……………3分 函数()f x 的定义域为{,}x x k k ≠π∈Z . ……………4分(Ⅱ)因为()2f x =1)2sin 43x x π+-=, ……………5分1)2sin 223x x x +-=, ……………7分 1cos sin 3x x -=, ……………9分 将上式平方,得11sin29x -=, ……………12分所以8sin 29x =. ……………13分16.(本小题满分13分)(Ⅰ)证明:因为点O 是菱形ABCD 的对角线的交点,所以O 是AC 的中点.又点M 是棱BC 的中点,所以OM 是ABC ∆的中位线,//OM AB . ……………2分 因为OM ⊄平面ABD ,AB ⊂平面ABD ,所以//OM 平面ABD . ……………4分 (Ⅱ)证明:由题意,3OM OD ==,因为DM =所以90DOM ∠= ,OD OM ⊥. ……………6分 又因为菱形ABCD ,所以OD AC ⊥. …………7分 因为OM AC O = ,所以OD ⊥平面ABC , ……………8分 因为OD ⊂平面MDO ,所以平面ABC ⊥平面MDO . ……………9分(Ⅲ)解:三棱锥M ABD -的体积等于三棱锥D ABM -的体积. ……………10分由(Ⅱ)知,OD ⊥平面ABC ,所以3OD =为三棱锥D ABM -的高. ……………11分ABM ∆的面积为11sin120632222BA BM ⨯⨯=⨯⨯⨯=, ……………12分所求体积等于132ABM S OD ∆⨯⨯=. ……………13分17.(本小题满分13分) 解:(Ⅰ)由题意得80010080045020010015030045n++++++=, ……………2分所以100n =. ……………3分 (Ⅱ)设所选取的人中,有m 人20岁以下,则2002003005m=+,解得2m =.………5分也就是20岁以下抽取了2人,另一部分抽取了3人,分别记作A 1,A 2;B 1,B 2,B 3, 则从中任取2人的所有基本事件为 (A 1,B 1),(A 1, B 2),(A 1, B 3),(A 2 ,B 1),(A 2 ,B 2),(A 2 ,B 3),(A 1, A 2),(B 1 ,B 2),(B 2 ,B 3),(B 1 ,B 3)共10个. ………7分其中至少有1人20岁以下的基本事件有7个:(A 1, B 1),(A 1, B 2),(A 1, B 3),(A 2 ,B 1),(A 2 ,B 2),(A 2 ,B 3),(A 1, A 2), …………8分所以从中任意抽取2人,至少有1人20岁以下的概率为710. ……………9分 ABCMO D(Ⅲ)总体的平均数为1(9.48.69.29.68.79.39.08.2)98x =+++++++=,………10分 那么与总体平均数之差的绝对值超过0.6的数只有8.2, ……………12分 所以该数与总体平均数之差的绝对值超过0.6的概率为81. ……………13分18.(本小题满分14分)解:(Ⅰ)由已知()e e x g x x =-,所以()e e x g x '=-, ……………2分 由()e e 0x g x '=-=,得1x =, ……………3分 所以,在区间(,1)-∞上,()0g x '<,函数()g x 在区间(,1)-∞上单调递减; ……………4分 在区间(1,)+∞上,()0g x '>,函数()g x 在区间(1,)+∞上单调递增; ……………5分 即函数()g x 的单调递减区间为(,1)-∞,单调递增区间为(1,)+∞. (Ⅱ)因为()e x f x '=,所以曲线()y f x =在点P 处切线为l :000e e ()x xy x x -=-. ……………7分 切线l 与x 轴的交点为0(1,0)x -,与y 轴的交点为000(0,e e )xxx -, ……………9分 因为00x <,所以002000011(1)(1)e (12)e 22x x S x x x x =--=-+, ……………10分 0201e (1)2x S x '=-, ……………12分 在区间(,1)-∞-上,函数0()S x 单调递增,在区间(1,0)-上,函数0()S x 单调递减. ……………13分所以,当01x =-时,S 有最大值,此时2eS =, 所以,S 的最大值为2e. ……………14分 19、(本小题满分14分) 解:(Ⅰ)由已知2c =,c a = ……………2分解得2,a c =, ……………4分 所以2221b a c =-=, 椭圆的方程为2214xy +=. ……………5分(Ⅱ)由(Ⅰ)得过B 点的直线为1y kx =+,由221,41,x y y kx ⎧+=⎪⎨⎪=+⎩得22(41)80k x kx ++=, ……………6分 所以2814D k x k =-+,所以221414D k y k-=+, ……………8分 依题意0k ≠,12k ≠±. 因为,,BD BE DE 成等比数列,所以2BE BD DE =, ……………9分 所以2(1)D D b y y =-,即(1)1D D y y -=, ……………10分当0D y >时,210D D y y -+=,无解, ……………11分 当0D y <时,210D D y y --=,解得D y =, ……………12分所以221414k k -=+2k =所以,当,,BD BE DE成等比数列时,2k =……………14分 20.(本小题满分13分)(Ⅰ)证明:①函数)1()(>=a a x f x具有性质P . ……………1分111(1)(1)2()2(2)x x x x f x f x f x a a a a a a-+-++-=+-=+-,因为1>a ,1(2)0x a a a+->, ……………3分 即)(2)1()1(x f x f x f ≥++-, 此函数为具有性质P .②函数3)(x x f =不具有性质P . ……………4分 例如,当1x =-时,(1)(1)(2)(0)8f x f x f f -++=-+=-,2()2f x =-, ……………5分所以,)1()0()2(-<+-f f f , 此函数不具有性质P .(Ⅱ)假设)(i f 为(1),(2),,(1)f f f n - 中第一个大于0的值, ……………6分 则0)1()(>--i f i f , 因为函数()f x 具有性质P ,所以,对于任意n ∈*N ,均有(1)()()(1)f n f n f n f n +-≥--, 所以0)1()()2()1()1()(>--≥≥---≥--i f i f n f n f n f n f , 所以()[()(1)][(1)()]()0f n f n f n f i f i f i =--+++-+> ,与0)(=n f 矛盾,所以,对任意的{1,2,3,,1}i n ∈- 有()0f i ≤. ……………9分 (Ⅲ)不成立.例如2()()x x n x f x xx -⎧=⎨⎩为有理数,为无理数. ……………10分证明:当x 为有理数时,1,1x x -+均为有理数,222(1)(1)2()(1)(1)2(112)2f x f x f x x x x n x x x -++-=-++---++-=,当x 为无理数时,1,1x x -+均为无理数,22)1()1()(2)1()1(222=-++-=-++-x x x x f x f x f所以,函数)(x f 对任意的x ∈R ,均有)(2)1()1(x f x f x f ≥++-,即函数)(x f 具有性质P . ……………12分 而当],0[n x ∈(2n >)且当x 为无理数时,0)(>x f .所以,在(Ⅱ)的条件下,“对任意[0,]x n ∈均有0)(≤x f ”不成立.……………13分 (其他反例仿此给分. 如()()0()1x x f x ⎧=⎨⎩为有理数为无理数,()()0()1x x f x ⎧=⎨⎩为整数为非整数,2()()0()x x f x x⎧=⎨⎩为整数为非整数,等.)。
xyO π2π1-1丰台区2011年高三年级第二学期统一练习(二)数学(理科)2011.5一、本大题共8小题,每小题5分,共40分.在每小题列出的四个选项中,选出符合题目要求的一项. 1.在复平面内,复数121iz i-=+对应的点位于 (A) 第一象限 (B)第二象限 (C) 第三象限(D)第四象限2.下列四个命题中,假命题为(A) x ∀∈R ,20x > (B) x ∀∈R ,2310x x ++> (C) x ∃∈R ,lg 0x >(D) x ∃∈R ,122x =3.已知a >0且a ≠1,函数log a y x =,x y a =,y x a =+在同一坐标系中的图象可能是(A)(B) (C) (D)4.参数方程2cos (3sin x y θθθ=⎧⎨=⎩,,为参数)和极坐标方程4sin ρθ=所表示的图形分别是(A) 圆和直线 (B) 直线和直线 (C) 椭圆和直线 (D)椭圆和圆 5.由1,2,3,4,5组成没有重复数字且2与5不相邻的四位数的个数是(A) 120 (B) 84 (C) 60 (D) 486.已知函数sin()y A x ωϕ=+的图象如图所示,则该函数的解析式可能是(A) 441sin()555y x =+(B) 31sin(2)25y x =+(C) 441sin()555y x =-(D) 41sin(2)55y x =+7.已知直线l :0Ax By C ++=(A ,B 不全为0),两点111(,)P x y ,222(,)P x y ,若1122()()0Ax By C Ax By C ++++>,且1122Ax By C Ax By C ++>++,则(A) 直线l 与直线P 1P 2不相交(B) 直线l 与线段P 2P 1的延长线相交 (C) 直线l 与线段P 1P 2的延长线相交(D) 直线l 与线段P 1P 2相交OO O O x xxxyyyy1 11 1111 18.已知函数2()2f x x x =-,()2g x ax =+(a >0),若1[1,2]x ∀∈-,2[1,2]x ∃∈-,使得f (x 1)= g (x 2),则实数a 的取值范围是 (A) 1(0,]2(B) 1[,3]2(C) (0,3] (D)[3,)+∞二、填空题:本大题共6小题,每小题5分,共30分.9.圆C :222220x y x y ++--=的圆心到直线3x +4y +14=0的距离是. 10.如图所示,DB ,DC 是⊙O 的两条切线,A 是圆上一点,已知 ∠D =46°,则∠A =.11.函数2cos sin y x x x =-的最小正周期为,最大值 为.12.一个几何体的三视图如图所示,则该几何体的体积是.13.如果执行右面的程序框图,那么输出的a =___.14.如图所示,∠AOB =1rad ,点A l ,A 2,…在OA 上,点B 1,B 2,…在OB 上,其中的每一个实线段和虚线段的长均为1个长度单位,一个动点M 从O 点出发,沿着实线段和以O 为圆心的圆弧匀速运动,速度为l 长度单位/秒,则质点M 到达A 3点处所需要的时间为__秒,质点M 到达A n 点处所需要的时间为__秒.OA 1A 2 A 3 A 4B 1 B 2 B 3 B 4 AB正视图侧视图俯视图A三、解答题:本大题共6小题,共80分.解答应写出文字说明,演算步骤或证明过程. 15.(本小题共13分)已知等差数列{}n a 的前n 项和为n S ,a 2=4,S 5=35. (Ⅰ)求数列{}n a 的前n 项和n S ;(Ⅱ)若数列{}n b 满足n a n b e =,求数列{}n b 的前n 项和n T .16.(本小题共14分)张先生家住H 小区,他在C 科技园区工作,从家开车到公司上班有L 1,L 2两条路线(如图),L 1路线上有A 1,A 2,A 3三个路口,各路口遇到红灯的概率均为12;L 2路线上有B 1,B 2两个路口,各路口遇到红灯的概率依次为34,35.(Ⅰ)若走L 1路线,求最多..遇到1次红灯的概率; (Ⅱ)若走L 2路线,求遇到红灯次数X 的数学期望;(Ⅲ)按照“平均遇到红灯次数最少”的要求,请你帮助张先生从上述两条路线中选择一条最好的上班路线,并说明理由.17.(本小题共13分)已知平行四边形ABCD 中,AB =6,AD =10,BD =8,E 是线段AD 的中点.沿BD 将△BCD 翻折到△BC D ',使得平面BC D '⊥平面ABD . (Ⅰ)求证:C D '⊥平面ABD ; (Ⅱ)求直线BD 与平面BEC '所成角的正弦值; (Ⅲ)求二面角D BE C '--的余弦值.12A B D E C ' C18.(本小题共13分)已知函数2()ln (2)f x x ax a x =-+-. (Ⅰ)若()f x 在1x =处取得极值,求a 的值; (Ⅱ)求函数()y f x =在2[,]a a 上的最大值.19.(本小题共14分)已知抛物线P :x 2=2py (p >0).(Ⅰ)若抛物线上点(,2)M m 到焦点F 的距离为3.(ⅰ)求抛物线P 的方程;(ⅱ)设抛物线P 的准线与y 轴的交点为E ,过E 作抛物线P 的切线,求此切线方程; (Ⅱ)设过焦点F 的动直线l 交抛物线于A ,B 两点,连接AO ,BO 并延长分别交抛物线的准线于C ,D 两点,求证:以CD 为直径的圆过焦点F .20.(本小题共13分) 用[]a 表示不大于a 的最大整数.令集合{1,2,3,4,5}P =,对任意k P ∈和N*m ∈,定义51(,)[]i f m k ==∑,集合{N*,}A m k P =∈∈,并将集合A 中的元素按照从小到大的顺序排列,记为数列{}n a . (Ⅰ)求(1,2)f 的值; (Ⅱ)求9a 的值;(Ⅲ)求证:在数列{}n a中,不大于m 00(,)f m k 项.(考生务必将答案答在答题卡上,在试卷上作答无效)海淀区高三年级第二学期期末练习数学(理科) 2011.5选择题 (共40分)一、选择题:本大题共8小题,每小题5分,共40分.在每小题列出的四个选项中,选出符合题目要求的一项.1.复数11i+在复平面上对应的点的坐标是A .(1,1) B. (1,1)- C. (1,1)-- D. (1,1)-2. 已知全集R,U =集合{}1,2,3,4,5A =,{|2}B x x =∈≥R ,下图中阴影部分所表示的集合为 A {1}B.{0,1} C. {1,2}D. {0,1,2} 3.函数21()log f x x x=-的零点所在区间 A .1(0,)2 B.1(,1)2C.(1,2)D.(2,3) 4.若直线l 的参数方程为13()24x tt y t =+⎧⎨=-⎩为参数,则直线l 倾斜角的余弦值为A .45-B .35-C .35D .455. 某赛季甲、乙两名篮球运动员各13场比赛得分情况用茎叶图表示如下:甲 乙 9 8 8 1 7 7 9 9 6 1 0 2 2 5 6 7 9 9 5 3 2 0 3 0 2 3 7 1 0 4根据上图,对这两名运动员的成绩进行比较,下列四个结论中,不正确...的是 A .甲运动员得分的极差大于乙运动员得分的极差B .甲运动员得分的的中位数大于乙运动员得分的的中位数C .甲运动员的得分平均值大于乙运动员的得分平均值D .甲运动员的成绩比乙运动员的成绩稳定6.一个锥体的主视图和左视图如图所示,下面选项中,不.可能是...该锥体的俯视图的是7.若椭圆1C :1212212=+b ya x(011>>b a )和椭圆2C :1222222=+b ya x(022>>b a )的焦点相同且12a a >.给出如下四个结论:① 椭圆1C 和椭圆2C 一定没有公共点; ②1122a b a b >; ③22212221b b a a -=-; ④1212a a b b -<-.其中,所有正确结论的序号是A .②③④B. ①③④C .①②④D.①②③8. 在一个正方体1111A B C D A B C D -中,P 为正方形1111A B C D 四边上的动点,O 为底面正方形ABCD 的中心,,M N 分别为,AB BC 中点,点Q 为平面ABCD 内一点,线段1D Q 与OP 互相平分,则满足M Q λ=的实数λ的值有A. 0个B. 1个C. 2个D. 3个非选择题(共110分)二、填空题:本大题共6小题,每小题5分,共30分.9.点(,)P x y 在不等式组2,,2y x y x x ≤⎧⎪≥-⎨⎪≤⎩表示的平面区域内,则z x y =+的最大值为_______.主视图左视图B ACDA1D 1A 1C 1B DCBOPNQ10.运行如图所示的程序框图,若输入4n =,则输出S 的值为 . 11.若4234512345(1)x mx a x a x a x a x a x -=++++, 其中26a =-,则实数m 的值为;12345a a a a a ++++的值为.12.如图,已知O 的弦AB 交半径OC 于点D ,若3AD =,2BD =,且D 为OC 的中点,则CD 的长为 .13.已知数列{}n a 满足1,a t =,120n n a a +-+=(,)t n ∈∈**N N ,记数列{}n a 的前n 项和的最大值为()f t ,则()f t = .14. 已知函数sin ()xf x x=(1)判断下列三个命题的真假: ①()f x 是偶函数;②()1f x <;③当32x π=时,()f x 取得极小值. 其中真命题有____________________;(写出所有真命题的序号) (2)满足()()666n n f f πππ<+的正整数n 的最小值为___________. 三、解答题: 本大题共6小题,共80分.解答应写出文字说明, 演算步骤或证明过程.15.(本小题共13分)已知函数2()coscos f x x x x ωωω=(0)ω>的最小正周期为π.(Ⅰ)求2()3f π的值;(Ⅱ)求函数()f x 的单调区间及其图象的对称轴方程.16.(本小题共13分)某商场一号电梯从1层出发后可以在2、3、4层停靠.已知该电梯在1层载有4位乘客,假设每位乘客在2、3、4层下电梯是等可能的.(Ⅰ)求这4位乘客中至少有一名乘客在第2层下电梯的概率;(Ⅱ)用X 表示4名乘客在第4层下电梯的人数,求X 的分布列和数学期望. 17.(本小题共14分)如图,四棱锥P ABCD -的底面是直角梯形,//AB CD ,AB AD ⊥,PAB ∆和PAD ∆是两个边长为2的正三角形,4DC =,O 为BD 的中点,E 为PA 的中点. (Ⅰ)求证:PO ⊥平面ABCD ;(Ⅱ)求证://OE 平面PDC ;(Ⅲ)求直线CB 与平面PDC 所成角的正弦值.18. (本小题共14分)已知函数221()()ln 2f x ax x x ax x =--+.()a ∈R . (I )当0a =时,求曲线()y f x =在(e,(e))f 处的切线方程(e 2.718...=); (II )求函数()f x 的单调区间.19.(本小题共13分)在平面直角坐标系xOy 中,设点(,),(,4)P x y M x -,以线段PM 为直径的圆经过原点O .(Ⅰ)求动点P 的轨迹W 的方程;(Ⅱ)过点(0,4)E -的直线l 与轨迹W 交于两点,A B ,点A 关于y 轴的对称点为'A ,试判断直线'A B 是否恒过一定点,并证明你的结论.20. (本小题共13分)对于数列12n A a a a :,,,,若满足{}0,1(1,2,3,,)i a i n ∈=⋅⋅⋅,则称数列A 为“0-1数列”.定义变换T ,T 将“0-1数列”A 中原有的每个1都变成0,1,原有的每个0都变成1,0. 例如A :1,0,1,则():0,1,1,0,0,1.T A 设0A 是“0-1数列”,令1(),k k A T A -= 12k = ,,3,.(Ⅰ)若数列2A :1,0,0,1,0,1,1,0,1,0,0,1.求数列10,A A ;(Ⅱ) 若数列0A 共有10项,则数列2A 中连续两项相等的数对至少有多少对?请说明理由;A D OC PBE(Ⅲ)若0A 为0,1,记数列k A 中连续两项都是0的数对个数为k l ,1,2,3,k =⋅⋅⋅.求k l 关于k 的表达式.北京市朝阳区高三年级第二次综合练习数学测试题(理工类)2011.5(考试时间120分钟满分150分)本试卷分为选择题(共40分)和非选择题(共110分)两部分第一部分(选择题共40分)注意事项:1.答第一部分前,考生务必将自己的姓名、考试科目涂写在答题卡上.考试结束时,将试题卷和答题卡一并交回.2.每小题选出答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其他答案标号,不能答在试题卷上.一、选择题:本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,选出符合题目要求的一项. (1)已知全集U =R ,集合{|021}xA x =<<,3{|log 0}B x x =>,则U ()A B I ð=(A ){|1}x x >(B ){|0}x x >(C ){|01}x x <<(D ){|0}x x <(2)设,x y ∈R ,那么“0>>y x ”是“1>yx”的 (A )必要不充分条件(B )充分不必要条件 (C )充分必要条件 (D )既不充分又不必要条件(3)三棱柱的侧棱与底面垂直,且底面是边长为2的等边三角形,其正视图(如图所示)的面积为8,则侧视图的面积为(A ) 8 (B ) 4(C)D(4)已知随机变量X 服从正态分布(, 4)N a ,且(1)0.5P X >=,则实数a 的值为(A )1 (BC )2(D )4(5)若一个三位数的十位数字比个位数字和百位数字都大,则称这个数为“伞数”.现从正视图1,2,3,4,5,6这六个数字中任取3个数,组成无重复数字的三位数,其中“伞数”有 (A )120个(B )80个(C )40个(D )20个(6)点P 是抛物线x y 42=上一动点,则点P 到点(0,1)A -的距离与到直线1-=x 的距离和的最小值是 (ABC )2 (D )2(7)已知棱长为1的正方体1111ABCD A BC D -中,点E ,F 分别是棱1BB ,1DD 上的动 点,且1BE D F λ==1(0)2λ<≤.设EF 与AB 所成的角为α,与BC 所成的角为β,则αβ+的最小值(A )不存在(B )等于60︒(C )等于90︒(D )等于120︒(8)已知点P 是ABC ∆的中位线EF 上任意一点,且//EF BC ,实数x ,y 满足PA xPB yPC ++=0 .设ABC ∆,PBC ∆,PCA ∆,PAB ∆的面积分别为S ,1S ,2S ,3S ,记11SSλ=,22S S λ=,33S Sλ=.则23λλ⋅取最大值时,2x y +的值为(A )32(B )12(C ) 1 (D )2 第二部分(非选择题共110分)二、填空题:本大题共6小题,每小题5分,共30分.把答案填在题中横线上.(9)已知复数z 满足1iz i =-,则z =. (10)曲线C :cos 1,sin 1x y θθ=-⎧⎨=+⎩(θ为参数)的普通方程为.(11)曲线233y x =-与x 轴所围成的图形面积为________.(12)已知数列{}n a 满足12a =,且*1120,n n n n a a a a n +++-=∈N ,则2a =;并归纳出数列{}n a 的通项公式n a =.(13)如图,PA 与圆O 相切点A ,PCB 为圆O 的割线,并且不过圆心O ,已知30BPA ∠=,PA =1PC =,则PB =;圆O 的 半径等于.(14)已知函数2()(1)1f x ax b x b =+++-,且(0, 3)a ∈,则对于任意 的b ∈R ,函数()()F x f x x =-总有两个不同的零点的概率是.三、解答题:本大题共6小题,共80分.解答应写出文字说明,演算步骤或证明过程. (15)(本小题满分13分)已知函数2()2sin sin()2sin 12f x x x x π=⋅+-+()x ∈R . (Ⅰ)求函数()f x 的最小正周期及函数()f x 的单调递增区间;(Ⅱ)若0()23x f =,ππ(, )44x ∈-,求0cos 2x 的值.(16)(本小题满分13分)为了防止受到核污染的产品影响我国民众的身体健康,要求产品在进入市场前必须进行两轮核辐射检测,只有两轮都合格才能进行销售,否则不能销售.已知某产品第一轮检测不合格的概率为16,第二轮检测不合格的概率为110,两轮检测是否合格相互没有影响. (Ⅰ)求该产品不能销售的概率;(Ⅱ)如果产品可以销售,则每件产品可获利40元;如果产品不能销售,则每件产品亏损80元(即获利-80元).已知一箱中有产品4件,记一箱产品获利X 元,求X 的分布列,并求出均值E (X ).(17)(本小题满分13分)在长方形11AA B B 中,124AB AA ==,C ,1C 分别是AB ,11A B 的中点(如图1). 将此长方形沿1CC 对折,使二面角11A CC B --为直二面角,D ,E 分别是11A B ,1CC 的中点(如图2).(Ⅰ)求证:1C D ∥平面1A BE ; (Ⅱ)求证:平面1A BE ⊥平面11AA B B ; (Ⅲ)求直线1BC 与平面1A BE 所成角的正弦值.(18)(本小题满分13分)设函数2()ln ()f x x x a =+-,a ∈R . (Ⅰ)若0a =,求函数()f x 在[1,]e 上的最小值;(Ⅱ)若函数()f x 在1[, 2]2上存在单调递增区间,试求实数a 的取值范围; (Ⅲ)求函数)(x f 的极值点.(19)(本小题满分14分)已知椭圆2222:1(0)x y C a b a b +=>>经过点(2, 1)A ,离心率为2.过点(3, 0)B 的直线l 与椭圆C交于不同的两点,M N . (Ⅰ)求椭圆C 的方程; (Ⅱ)求BM BN ⋅的取值范围;(Ⅲ)设直线AM 和直线AN 的斜率分别为AM k 和AN k ,求证:AM AN k k +为定值.(20)(本小题满分14分)对于正整数, a b ,存在唯一一对整数q 和r ,使得a bq r =+,0r b <≤.特别地,当0r =时,称b 能整除a ,记作|b a ,已知{1, 2, 3,,23}A =⋅⋅⋅.(Ⅰ)存在q A ∈,使得201191 (091)q r r =+<≤,试求,q r 的值;图(1)(Ⅱ)求证:不存在这样的函数:{1,2,3}f A →,使得对任意的整数12,x x A ∈,若12||{1,2,3}x x -∈,则12()()f x f x ≠;(Ⅲ)若B A ⊆,12)(=B card (()card B 指集合B 中的元素的个数),且存在,a b B ∈,b a <,|b a ,则称B 为“和谐集”.求最大的m A ∈,使含m 的集合A 的有12个元素的任意子集为“和谐集”,并说明理由.北京市西城区2011年高三二模试卷数学(理科)2011.5第Ⅰ卷(选择题 共40分)一、选择题:本大题共8小题,每小题5分,共40分. 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{0,1}A =,{1,0,3}B a =-+,且A B ⊆,则a 等于 (A )1(B )0(C )2-(D )3-2.已知i 是虚数单位,则复数23z i+2i 3i =+所对应的点落在(A )第一象限 (B )第二象限 (C )第三象限(D )第四象限3.在ABC ∆中,“0AB BC ⋅>”是“ABC ∆为钝角三角形”的(A )充分不必要条件 (B )必要不充分条件 (C )充要条件(D )既不充分又不必要条件4.已知六棱锥P ABCDEF -的底面是正六边形,PA ⊥平面ABC .则下列结论不正确...的是 (A )//CD 平面PAF (B )DF ⊥平面PAF (C )//CF 平面PAB (D )CF ⊥平面PAD5.双曲线22221x y a b-=的渐近线与圆22(2)1x y +-=相切,则双曲线离心率为(A(B(C )2(D )3 6.函数sin()(0)y x ϕϕ=π+>的部分图象如右图所示,设P 是图象的最高点,,A B 是图象与x 轴的交点,则tan APB ∠=(A )10 (B )8 (C )87(D )77.已知数列{}n a 的通项公式为13n a n =-,那么满足119102k k k a a a +++++= 的整数k(A )有3个 (B )有2个 (C )有1个(D )不存在8.设点(1,0)A ,(2,1)B ,如果直线1ax by +=与线段AB 有一个公共点,那么22a b +(A )最小值为15 (B )最小值为5 (C )最大值为15(D第Ⅱ卷(非选择题 共110分)二、填空题:本大题共6小题,每小题5分,共30分. 9.在中,若2B A =,:a b =A =_____. 10.在521()x x+的展开式中,2x 的系数是_____. 11.如图,AB 是圆O 的直径,P 在AB 的延长线上,PD切圆O 于点C .已知圆O 2OP =,则PC =______;ACD ∠的大小为______.12.在极坐标系中,点(2,)2A π关于直线:cos 1l ρθ=的对称点的一个极坐标为_____.13.定义某种运算⊗,a b ⊗的运算原理如右图所示.ABC ∆设()(0)(2)f x x x x =⊗-⊗. 则(2)f =______;()f x 在区间[2,2]-上的最小值为______.14.数列{}n a 满足11a =,11n n n a a n λ+-=+,其中λ∈R , 12n = ,,.①当0λ=时,20a =_____;② 若存在正整数m ,当n m >时总有0n a <,则λ的取值范围是_____.三、解答题:本大题共6小题,共80分. 解答应写出必要的文字说明、证明过程或演算步骤. 15.(本小题满分13分)已知函数cos 2()sin()4x f x x π=+.(Ⅰ)求函数()f x 的定义域; (Ⅱ)若4()3f x =,求s i n 2x 的值.16.(本小题满分13分)如图,已知菱形ABCD 的边长为6,60BAD ∠=,AC BD O = .将菱形ABCD 沿对角线AC 折起,使BD =B ACD -.(Ⅰ)若点M 是棱BC 的中点,求证://OM 平面ABD ; (Ⅱ)求二面角A B D O --的余弦值;(Ⅲ)设点N 是线段BD 上一个动点,试确定N点的位置,使得CN =.17.(本小题满分13分)甲班有2名男乒乓球选手和3名女乒乓球选手,乙班有3名男乒乓球选手和1名女乒乓球选手,学校计划从甲乙两班各选2名选手参加体育交流活动.M(Ⅰ)求选出的4名选手均为男选手的概率.(Ⅱ)记X 为选出的4名选手中女选手的人数,求X 的分布列和期望.18.(本小题满分14分)已知函数()(1)e (0)xa f x x x=->,其中e 为自然对数的底数.(Ⅰ)当2a =时,求曲线()y f x =在(1,(1))f 处的切线与坐标轴围成的面积;(Ⅱ)若函数()f x 存在一个极大值点和一个极小值点,且极大值与极小值的积为5e ,求a 的值.19.(本小题满分14分)已知椭圆2222:1x y M a b +=(0)a b >>且椭圆上一点与椭圆的两个焦点构成的三角形周长为246+.(Ⅰ)求椭圆M 的方程;(Ⅱ)设直线l 与椭圆M 交于,A B 两点,且以AB 为直径的圆过椭圆的右顶点C , 求ABC ∆面积的最大值.20.(本小题满分13分)若m A A A ,,,21 为集合2}(,,2,1{≥=n n A 且)n ∈*N 的子集,且满足两个条件: ①12m A A A A = ;②对任意的A y x ⊆},{,至少存在一个},,3,2,1{m i ∈,使}{},{x y x A i = 或}{y . 则称集合组m A A A ,,,21 具有性质P .如图,作n 行m 列数表,定义数表中的第k 行第l 列的数为⎩⎨⎧∉∈=)(0)(1l l kl A k A k a .(Ⅰ)当4n =时,判断下列两个集合组是否具有性质P ,如果是请画出所对应的表格,如果不是请说明理由;集合组1:123{1,3},{2,3},{4}A A A ===; 集合组2:123{2,3,4},{2,3},{1,4}A A A ===. (Ⅱ)当7n =时,若集合组123,,A A A 具有性质P ,请先画出所对应的7行3列的一个数表,再依此表格分别写出集合123,,A A A ;(Ⅲ)当100n =时,集合组12,,,t A A A 是具有性质P 且所含集合个数最小的集合组,求t 的值及12||||||t A A A ++ 的最小值.(其中||i A 表示集合i A 所含元素的个数)北京市东城区2010-2011学年第二学期高三综合练习(二)数学 (理科)第Ⅰ卷(选择题 共40分)一、本大题共8小题,每小题5分,共40分。
北京市西城区2011年高三二模试卷英语试题2011.5第一节:单项填空(共15小题,每小题1分,满分15分)21.Have you got these jeans in larger size? This pair is a bit too small around waist.A.a; the B./; the C.the; / D.a; a22.If you’d written earlier, I’d have known when you to go on holiday.A.want B.have wanted C.wanted D.will want23.—What’s wrong with your ipad? The sound is not clear.—Yes. It has been broken for some time.A.come out B.coming out C.to come out D.came out24.She is fed up with sharing a house with others; , she is looking for her own flat. A.moreoverB.otherwise C.however D.therefore25.If we use the new recycling method, a large number of trees .A.are saved B.will save C.will be saved D.have saved26.left the door unlocked must be held responsible for the accident.A.Whomever B.Whoever C.Whatever D.Whenever27.With a lot of tough problems , the pilot was still calm, cool and collective under pressure.A.solve B.solved C.solving D.to solve28.What I like about Harvard is there’s the old classical look—there are parks and traditional buildings.A.why B.where C.that D.how29.—The battery in my cell phone is running low.—I that last night before we went to bed.A.was noticing B.have noticed C.would notice D.had noticed30.More than a quarter of the energy in the United States goes to moving people and goods from one place to another.A.using B.used C.to use D.use31.The part in the film the man broke down the door made some of the audience give a cry.A.which B.who C.where D.whom32.When Thanksgiving Day is the corner, stores and supermarkets are busy with people.A.around B.on C.with D.at33.—Where on earth have they gone?—I have no idea, but I wish I .A.know B.knew C.would know D.would have known34.Lifting off at sunrise, the hot air balloon goes wherever the wind blow.A.may B.must C.need D.should35.—I don’t care for baseball.—How can you say you don’t like something you’ve never even tried it!A.till B.after C.unless D.when第二节完型填空(共20小题;每小题1.5分,满分30分)Tried and exhausted, I came back home from work. I found the front door was 36 open and I felt a little scared. Did I carelessly forget to lock it after I left? I looked around 37 to see what could be 38 . Why would someone come into my home only to 39 with nothing? After searching every inch, I realized that everything was 40 I had left it. No 41 cushions, broken lamps, or 42 emptied out on the carpet. Feeling much 43 . I looked out my oversized window of my dinning room at Ms. Sullivan’s house. Jimmy, the little boy next door was visiting her. Jimmy cared a lot about Ms. Sullivan and was very concerned with her health after she became ill. She used to 44 Jimmy when he was just a baby.Forgetting about the 45 with my front door, I decided to walk over to Ms. Sullivan’s house to see how shewas 46 . With a warm hello, she invited me into her home. I noticed twelve beautiful roses delicately presented on the table next to her bed. They looked exactly like the 47 on my dinning room table in front of my oversized window. With a pleasant smile, she told me Jimmy brought them to her as a “get-well gift”. Suddenly Jimmy 48 out of his seat in an instant and said that he had to go home for a while to do some homework but he promised to be back to 49 up on Ms. Sullivan.Talking for a while, Ms. Sullivan began to get very tired so I gave her my phone number in case she 50 needed help, and left her home. I thought about how 51 it was for little Jimmy to be so concerned for Ms. Sullivan. I got home, laughing at how 52 I was that morning about what had happened over 53 . I walked passed the dinning room and noticed my roses 54 in the vase were missing. Without a second 55 , I glanced out the window at Ms. Sullivan’s house and with a smile on my face I turned off the light in the room and went to sleep.The next morning my door bell rang. I opened the door Jimmy was there…36.A.easily B.slowly C.slightly D.silently37.A.tensely B.patiently C.eagerly D.calmly38.A.burning B.losing C.lacking D.missing39.A.get B.deal C.steal D.leave40.A.what B.where C.that D.how41.A.worn B.changed C.unwashed D.overturned42.A.lockers B.kettles C.drawers D.coats43.A.eased B.angry C.surprised D.curious44.A.watch B.guard C.follow D.visit45.A.accident B.experience C.incident D.condition46.A.working B.doing C.sleeping D.acting47.A.lamps B.vases C.roses D.gifts48.A.stood B.ran C.stepped D.jumped49.A.look B.check C.pick D.call50.A.ever B.still C.only D.just51.A.smart B.sensitive C.sweet D.thankful52.A.strange B.nervous C.careless D.wrong53.A.everything B.something C.anything D.nothing54.A.growing B.sitting C.lying D.arranging55.A.thought B.intention C.expectation D.delay第三部分:阅读理解(共两节,40分)第一节(共15小题;每小题2分,共30分)AOn Christmas morning, I went to the Cockhedge Mall. People there were all busy buying their last minute requirements. I needed to buy a birthday card for my son-in-law whose birthday is the 29th of December. Picking up a few more things as well as my cared I went to join the line for the express checkout which was for people who only had a few items in a basket and not a trolley load. This line was next to the Customer Service desk.Seemingly waiting quite a long time, I was jogged out of my thoughts by a voice behind me making comments on the things I bought.It was so funny when I realized that she was describing the contents of my basket. The owner of the voice was a very pretty young lady. I said to her that I was going to buy a box of Christmas cookies but the only ones left were not to my liking. The lady told me that just opposite Cockhedge in Superdrug they had lots of cookies. I said, “I’m not going to bother now. I had enough of shops and I’m going home.”The assistant from the Customer Service came across at this time saying “If there is anyone in the line with a few items in their basket, none of which needed to be weighed, I will check out their groceries at the desk.” Because I had the sprouts which needed to be weighted, the young lady accepted the offer and walked away waving goodbye.Eventually my turn came at the checkout. I was walking away when I met my new friend once again who handed me a beautiful box of Christmas cookies. With a big hug she said “Hope you have a lovely Christmas.” She had been into Superdrug to buy me the cookies while I was still queuing in Cockhedge.What a generosity to a stranger! I was so surprised you could have knocked me down with a feather. My Good Samaritan would never know what a joyful Christmas day I had with my family. Telling them this story, as we ate around the table, kept everyone spellbound.56.The underlined word “spellbound” in the last paragraph probably means .A.interested B.disappointed C.astonished D.frightened57.Which of the following could be the best title of the story?A.A Piece of Lucky Feather B.A Surprise Christmas GiftC.The Boring Shopping Experience D.The Unforgettable Big Hug58.How does the writer feel about the pretty young lady?A.Worried. B.Satisfied. C.Grateful D.Proud.59.What can we learn from the story?A.Nobody is sure what will happen the next moment.B.A simple action can bring other people happiness.C.Being patient will decrease the waiting time.D.Life without hope and faith is a full thing.BCount Me OutCall me old-fashioned. Call me old. Call me what you want, but refuse to become part of this new Internet world.I do not possess a computer at home or at the office. Actually, I stopped going to an office 35 years ago, when all communications were done with a pen, a typewriter, or, if the matter was of world-shaking importance, over the telephone. Likewise, if you like something advertised in a newspaper or magazine, you visited the shop selling it at the given address, or you phoned, the number shown. Then you spoke to the fellow and asked for further details.Tell me what you think of the following ad that appeared the other day in the newspaper. It was for a cure for cancer and this is what it said: “Awareness is the key. Visit spfulford. com at the awareness site.” There was no address or telephone number for the site. So what do unfortunate people without a computer do it they are seeking a cure for their illness?There are, I am told, certain advantages in having access to the Internet. You can, for example, send love messages across the world or even get married to someone that you meet online. This bit doesn’t interest me; I have been happily married for 60 years. There are, of course, other activities for Internet users besides finding love. They can pay bills, order groceries, or discuss with their doctors.And this is by no means all. More amazing things are yet to come in the near future. I read a newspaper report recently that quoted Stephen Hawking, an important British scientist. “The complexity of a computer as it exists today is probably less than the brain of an earthworm,” he said. “But, as technology advances, computers will become more complex, and a time may come when the Internet may develop ‘consciousness.’ In other words, the Internet will be able to think, have feelings, and may well be able to act on its own.”If Professor Hawking is right, I may change my attitude about conjurers. As I grow older each day, I would like one of those that not only thinks for me but also accepts responsibilities for all my mistakes. 60.What’s the meaning of the title “Count Me Out”?A.Get me out of the Internet world.B.Computers are trying to take control of life.C.Modern technology pushes old people away.D.Do not expect me to be a supporter of the Internet.61.According to Paragraph 2, the author thinks computers are .A.unnecessary B.convenient C.expensive D.advanced62.What might the author like about the future computer?A.Taking blames. B.Curing illnesses.C.Delivering messages. D.Responding to emotions.CWe’ve all seen them: perfectly toned famous people on late-night television telling us that we too can develop rock-hard abdominal muscles(腹肌). It’s easy! Just pay $149.99 for the Torso Track or $149.75 for the Ad-Doer andwatch those unwanted inches leave your waist. Americans spend tens of million of dollars on various products to firm up their fat around the waist.And did they work? Not necessarily. Independent studies have concluded that most of these products-no matter who approved them or how expensive they are-shape your midsection no better than old-fashioned stomach crunches(仰卧起坐). Some can even cause injury-like the $518.99 Body Shaper-Q8SP, which left electrical burns on some researchers at the University of Wisconsin, La Crosse. Others, like the popular Ab-Doer, trpically burn less energy than a gentle walk, according to a study to be published in September by the American Council on Exercise.The fact is that many Americans don’t have the biological makeup to develop an obvious abdominal muscles. They are either unable to get the necessary muscle mass or they can’t lose enough fat to make a difference. Even if the underlying muscles are well developed, and it takes to hide it is one-sixteenth of tan inch of fat. That’s enough to dismiss most healthy women as well as plenty of guys who do crunches every day.So what works best? In its new study, the exercise experts researched on the results of the popular Ab-Doer. A lengthy TV advertisement promises that just 10 minutes a day performing such movements as “Body Boogies” and “Good Mornings”will “help form those muscles the fun and easy way without diets.”Steven Loy, professor at California State University, Northridge, tested the promise by measuring the electrical activity produced by the abdominal muscles during three Ab-Doer movements. He and his colleagues then compared the results with those produced during traditional exercises. They determined that the muscles were no more active, and in some cases less so, when exercisers were using the Ab-Doer.Taking a broader approach, researchers at San Diego State University compared 13 abdominal exercises for their ability to develop the central abdominal muscles. They concluded, in a report published in May, that the most effective exercises kept turning the body and worked the muscles the entire time. Among the winners: the bicycle movements-so called because it looks as if you are riding a bike while lying flat on the floor-and exercises performed on the “Captain’s Chair”, a product typically found in gyms that helps hold the body in the air while you raise your legs up toward your chest. Researchers suggested that a varied routine of the different exercises could deliver the best results.63.Which of the following is the most effective in building abdominal muscles?A.Torso Track. B.Ab-Doer.C.Captain’s Chair. D.Body Shaper-Q8SP. 64.According to the author, it’s difficult for many Americans to get visible firm abdominal muscles mainly because .A.they do not put in enough effortsB.injuries interrupt their exercise frequentlyC.they change their exercise routine regularlyD.how big their muscles will be is determined by birth65.The author convinces the readers by .A.describing successful eases B.offering professional connectsC.presenting findings of researches D.comparing advertisements of products66.What’s the main purpose of this passage?A.To research and develop in order to create the perfect stomach and exercise machine.B.To promote proven exercise techniques and to advise against false advertisements.C.To indicate that diet and exercises are necessary factors for a fit midsection.D.To sponsor rich healthy lifestyle based on advanced product research.DDestiny and Personal ResponsibilityOne important variable affecting communication across cultures is destiny(命运)and personal responsibility. This refers to the degree to which we feel ourselves the masters of our lives, contrary to the degree to which we see ourselves as subject to things outside our control. Another way to look at this is to ask how much we see ourselves able to change and act, to choose the course of our lives and relationships. Some have drawn a parallel between the personal responsibility in North American settings and the view itself. The North American view is vast, with large spaces of unpopulated land. The frontier attitude of “King”of the wilderness, and the expansiveness of the land reaching huge distances, may relate to generally high levels of confidence in the ability to shape and choose ourdestinies.In this expansive land, many children grow up with a heroic sense of life, where ideas are big, and hope springs forever. When they experience temporary failures, they encouraged to redouble their efforts, to “try, try again.” Action, efficiency(效率), and achievement are valued and expected. Free will is respected in laws and enforced by courts.Now consider places in the world with much smaller land, whose history reflects wars and tough struggles: Northern Ireland, Mexico, Israel, Palestine. In these places, destiny’s role is more important in human life. In Mexico, there is a history of hard life, fighting over land, and loss of homes. Mexicans are more likely to see struggles as part of their life and unavoidable. Their passive attitude is expr4essed in their way of responding to failure or accident by saying “ni modo”(“no way” or “tough lick”), meaning that the failure was destined.This variable is important to understanding cultural conflict. If someone believing in free will crosses paths with someone more passive, miscommunication is likely. The first person may expect action and accountability. Failing to see it, he may conclude that the second is lazy, not cooperative, or dishonest. The second person will expect respect for the natural order of thins. Failing to see it, he may conclude that the first is forcible, rude, or big headed in his ideas of what can be accomplished or changed.67.The author thinks that one’s character is partly determined by .A.physical senses B.general attitudeC.financial background D.geographic characteristics68.According to the passage, Mexicans would think that Americans are .A.impractical B.dishonest C.ambitious D.hesitant69.The underlined word “subject” in Paragraph 1 probably means .A.a topic of a discussion B.a branch of knowledgeC.a person being experimented on D.a person under the power of others70.The author would probably agree that .A.vast land may lead to a more controllable desireB.heroic sense of life roots deeply in a small countryC.living in limited space contributes to an accepting attitudeD.fighting over land may help people gain high levels of confidence第二节(共5小题;每小题2分,共10分)Why Cats Scratch TingsIn has long been assumed that when cats scratch objects with their front paws(爪子)that they are sharpening their claws. 71 Research on cat behavior suggests that the major reason for this behavior is communication. By scratching up the bark of a tree (or the leg of your favorite chair) the cat is letting other cats or people know where she is and what she is up to.Cats tend to pick a small number of noticeable objects in their environments to scratch such as trees, fence posts repeatedly. 72 The scratched surface leaves a highly visible mark that can be easily seen by other cats. In addition, cats have special glands (腺)in their paws so that when they make scratching movements they leave scent(气味)that the cats can smell. The fact that cats leave scent marks by making scratching movements may be the reason that cats will continue to scratch objects even after they have been declawed. 73We don’t know exactly what cats are communicating with their scratching. Both males and females do it. It is done inside and outside the home and even by cats living with no other cats around. 74 Cats don’t scratch up your furniture to bother you or just to be destructive, but for specific reasons, one of which is communicating. Cats also scratch to extend their bodies, during play, and possibly as a greeting or to relieve dissatisfaction when prevented from doing other things they want to do.75 It is easier to prevent problem scratching rather than trying to change your cat’s preference for the arm of your sofa after it has become a built up habit. Thus, the goal is to establish acceptable scratching habits by getting your cat to prefer a scratching post rather than the arm of your sofa.A.It turns out that this is only a secondary reason.B.This is why the tree next door looks so scratched up.C.Cats use other parts of their bodies to communicate as well.D.Small pieces of bark have accumulated on the ground underneath.E.Scratching can result in considerable damage, owner dissatisfaction.F.Declawed cats may still be leaving scent marks on objects they scratch.G.It could be a defensive warning or just a marker that announces its existence. 第一节:情景作文(20分)假设你是红星中学高中学生李华,最近,你校学生会对影响学生课外阅读的因素进行了调查,结果见下图。
_________高考题库,荣誉出品_________ ●-------------------------密--------------封--------------线--------------内--------------请--------------不--------------要--------------答--------------题-------------------------●2011年北京各城区高三一模二模语文真题-分类汇编之文学常识题库出品,必是精品题号 一 二 总分 得分△注意事项:1.本系列试题包含2011年-2013年北京市各城区一模二模真题。
2.本系列文档有相关的试题分类汇编,具体见封面。
3.本系列文档为高考题库精心校对版本4.本系列试题涵盖北京高考所有学科,并有纸质版讲义出版。
一 、选择题(本大题共11小题,每小题0分,共0分。
在每小题给出的四个选项中,只有一个选项是符合题目要求的) 1.(2011北京西城区高三一模语文)下列语句画线处所指的文学家,依次是①味摩诘之诗,诗中有画;观摩诘之画,画中有诗。
②奚官有知应解笑,世无坡仙谁赏音。
③老杜诗当是诗中《六经》,他人诗乃诸子之流也。
④千古同惜长沙傅,空白汨罗步尘埃。
A .王 维 蒲松龄 杜 牧 贾 谊 B .王昌龄 苏 轼 杜 牧 屈 原 C .王 维 苏 轼 杜 甫 贾 谊 D .王昌龄 蒲松龄 杜 甫 屈 原2.(2011北京西城区高三二模语文)下列有关文学常识的表述,不正确...的一项是 A .陶渊明的《归园田居》《饮酒》等,其中对田园生活的描写,冲淡自然、恬静平和,在一定意义上是陶渊明性情的写照。
B .宋代女词人李清照的作品,与其自身遭遇相联系,前后期风格不同,《声声慢》是其抒发故国之思和身世之感的代表作。
C .《彷徨》是鲁迅的短篇小说集,其中塑造了孔乙己、阿Q 、祥林嫂等经典形象,他们都是受到精神和肉体双重迫害的弱者。
北京市西城区2011年初三二模试卷语文答案及评分标准2011.6一、选择(共12分。
每小题2分)二、填空(共8分)7.(1)答案:几处早莺争暖树(2)答案:断肠人在天涯(3)答案:闲来垂钓碧溪上(4)答案:不以物喜不以己悲评分标准:共5分。
共5空,每空1分,该空有错不得分。
8.答案:①齐天大圣②火眼金睛③如来佛评分标准:共3分。
共3空,每空1分,该空有错不得分。
三、综合性学习(共11分)9.答案示例:①国家依法对非物质文化遗产保护工作增加投入。
②我国积极参与联合国非物质文化遗产代表作的申报工作。
评分标准:共4分。
共2点,每点2分。
10.答案:①综合②程式③虚拟评分标准:共3分。
共3点,每点1分。
11.答案示例:①缺少年轻的传承人(或年轻人不爱干)②加大宣传,让年轻人了解、喜欢我国的非物质文化遗产。
③学校聘请民间艺术大师进入学校讲座或开设选修课。
评分标准:共4分。
概括困难2分,两个办法各1分。
四、文言文阅读(共8分)12.答案:(1)偏爱(1)穿戴评分标准:共2分。
共2道小题,每小题1分。
13.答案示例:(1)我与城北徐公相比,哪一个美?(2)在公众场所议论(君王的过失)。
评分标准:共4分。
共2道小题,每小题2分。
14.答案要点:①齐王称赞邹忌的建议提得好。
②立即下令赏谏,并根据提意见的程度设立奖赏等级。
评分标准:共2分。
共2个要点,每点1分。
照抄原文不得分。
第②点如果答成三个具体措施,得1分,少一点不得分。
五、现代文阅读(共31分)(一)(共15分)15.答案示例:①严厉而古板②鬼鬼祟祟,没了威严,不值得尊重③越来越显得匆匆④存在于更丰富的日常生活中评分标准:共4分。
共4点,每点1分。
16.答案示例:我从第一次发现的白发中感到时光飞逝,人生苦短。
评分标准:共4分。
“白发”(或“时间一直悄悄地躲在我的头发里行走,这一次露出了痕迹”)2分,“感到时光飞逝,人生苦短”2分。
17.分析示例1:作者写时间“躲在我的头发里行走”,“在母亲的口腔里行走”,“会变戏法”……用了拟人的修辞方法,表现出时间无处不在而又形色匆匆的特点,将抽象的时间写得生动形象,具体可感。
2011北京西城中考二模英语(含解析)北京市西城区2011年初三二模试卷英语知识运用(共27分)四、单项填空(共15分,每小题1分)从下面各题所给的A、B、C、D四个选项中,选择可以填入空白处的最佳选项。
21. If you hate less, love more, all good things are __________.A. youB. yourC. yoursD. yourself22. I am hungry. Can I have __________ to eat?A. somethingB. anythingC. everythingD. nothing23. Jane enjoys her life in Shanghai because she _________ a lot of friends there.A. havingB. haveC. hadD. has24. He did very well in the test _________ he worked hard all the time.A. becauseB. andC. thoughD. so25. —Which do you like _______, tea or coffee?—I will try a cup of coffee-tea.A. goodB. betterC. bestD. well26.—Wow, it is really crowded here and I am really tired.—You __________ have my seat. I am going now.A. mustn’tB. mustC. can’tD. can27. How can I help? Do you want me __________ here or do something else?A. to stayB. stayC. stayingD. stayed28._______ people took part in the recycling program to help improve the environment.A. ThousandB. Thousands ofC. ThousandthD. Thousands29. —W hat’re the children doing over there, Bob?—They _______ hide-and-seek.A. playB. playedC. will playD. are playing30. She regards you ___________ her best friend. It is not good to fool her.A. asB. inC. onD. for31. —What will you do tomorrow?—I will go out for fun if it __________ fine.A. isB. beC. will beD. was32. —Sir, can I catch the train? Here is my ticket.—It depends on how fast you can run. It ________ ten minutes ago.A. leavesB. is leavingC. leftD. will leave33. Several Chinese millionaires _________ for dinner by Bill Gates to discuss the art of giving money away.A. invitedB. were invitedC. will inviteD. invite34. —My leg _______ asleep and I can’t move any more.—Let’s take a break then.A. will fallB. fellC. has fallenD. was falling35. He asked me ________ so early. I told him that I had something important to do.A. why did I leaveB. why I leftC. why do I leaveD. why I leave五、完形填空(共12分,每小题1分)阅读下面短文,掌握其大意,然后从短文后各题所给的A、B、C、D四个选项中,选择最佳选项。
海淀区高三年级第二学期期末练习文科综合能力测试 2011.5选择题 (共140分)今年4月1日起,北京市开始实施新的停车收费标准,以缓解中心城区日益严重的交通拥堵。
读下表,回答第24、25题。
非居住区停车场白天收费标准单位:元/小时24北京市发改委大幅提髙重点区域停车费以调节交通流量,是运用宏观调控中的A.经济手段 B法律手段 C.财政政策 D 货币政策解析:本题考察国家宏观调控手段的知识点,宏观调控的手段包括经济、法律和行政,其中经济手段包括货币政策和财政政策等,本题我们知道经济手段并不是只是包括二者,我们需要把握的关键点在于,经济手段是通过“钱”这个媒介来调控的,那么本题就很容易选择,同样我们也可以把法律手段理解为通过“法”,行政手段通过“条令”。
25 对不同区域实行差别化停车收费,体现了A.创新就是对既往的否定和对现实的肯定B果断地抓住时机,实现事物的飞跃和发展C.承认矛盾特殊性是坚持唯物辩证法的前提D.具体问题具体分析是正确解决矛盾的关键解析:不同地区差别化,体现了矛盾的特殊性,容易选择D,A表述错误,B未体现,C表述错误,应该是承认矛盾或矛盾的普遍性而非特殊性。
26 个人所得税是国家对个人所得征收的一种税。
提高个人所得税起征点有利于①促进社会公平,改善人民生活②加快形成合理有序的收入分配格局③增加就业,提高社会保障水平④提髙劳动报酬在初次分配中的比重A ①②B ①③C ②④ D③④解析:本题考察的是时事热点问题,个税改革问题,较容易,个税改革与增加就业无相关联系,个税起征点调整涉及的是再次分配问题。
27 在我国,大量的民营企业集中在传统产业,而且存在着企业规模小、技术水平低、能源和资源消耗高等问题。
鼓励和引导民营经济健康发展,就要①使民营经济成为社会主义经济的重要组成部分②在优化产业结构的基础上提高效益、降低能耗③增强民营经济在国民经济中的控制力和影响力④支持民营企业科技创新,增强民营经济竞争力A ①② B①③ C ②④D③④解析:①表述错误,民营经济已经是重要组成部分,③说的是国有经济28,今年是我国加入世界贸易组织10周年。
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海淀区九年级第二学期期末练习数学参考答案及评分标准2011.6说明:合理答案均可酌情给分,但不得超过原题分数一、选择题(本题共32分,每小题4分)二、填空题(本题共16分,每小题4分)注:第12题答对一个给2分,答对两个给4分三、解答题(本题共30分,每小题5分)13.解:原式3=--1…….……………………..4分=-.2…….……………………..5分14.解:方程两边同时乘以(2)(2)+-方程可化为:x x-++=+-,x x x x x3(2)2(2)3(2)(2)…….……………………..2分即223624312-++=-.x x x x∴4x=.…….……………………..4分经检验:4x=是原方程的解.∴原方程的解是4x=.…….……………………..5分15. 证明:∵AE⊥BC于E,AF⊥CD于F,∴90∠=∠=︒,AEB AFD…….……………………..1分∵菱形ABCD,∴AB =AD , B D ∠=∠.…….……………………..3分 在Rt △EBA 和Rt △FDA 中, ,,.AEB AFD B D AB AD ∠=∠⎧⎪∠=∠⎨⎪=⎩∴△EBA ≌△FDA .…….……………………..4分∴AE =AF .…….……………………..5分16.解:∵2()(2)(2)x y x y y x ----=(2)(2)x y x y x y ---+…….……………………..1分(2)y x y =-,…….……………………..2分 又∵32y x y +=, ∴32x y y-=.………………..3分 将32x y y -=代入上式,得(2) 3.y x y -=∴当32y x y+=时,代数式2()(2)(2)x y x y y x ----的值为3. …….……………………..5分 17.解:(1)∵ 直线y x b =-+经过点(2,1)A , ∴ 12b =-+.…….……………………..1分 ∴ 3b =.…….……………………..2分 (2)∵ M 是直线3y x =-+上异于A 的动点,且在第一象限内.∴ 设M (a ,3a -+),且03a <<. 由MN ⊥x 轴,AB x ⊥轴得,MN=3a -+,ON=a ,AB =1,2OB =. ∵ MON △的面积和AOB △的面积相等,∴ ()1132122a a -+=⨯⨯.…….……………………..3分解得:11a =,22a =(不合题意,舍).…….……………………..4分 ∴ M (1,2).…….……………………..5分18.解:(1)由租用甲种汽车x 辆,则租用乙种汽车(8x -)辆.…….……………………..1分由题意得:290,100.4030(8)1020(8)x x x x +-⎧⎨+-⎩≥≥…….……………………..3分 解得:56x ≤≤.…….……………………..4分即共有2种租车方案: 第一种是租用甲种汽车5辆,乙种汽车3辆;第二种是租用甲种汽车6辆,乙种汽车2辆. …….……………………..5分19.解:作DE //AC ,交BC 的延长线于点E ,作DF ⊥BE,垂足为F .…….……………………..1分 ∵AD //BC ,∴四边形ACED 为平行四边形.∴AD=CE=3,BE=BC+CE=8.…….……………………..2分 ∵AC ⊥BD , ∴DE ⊥BD.∴△BDE 为直角三角形 ,90.BDE ∠=︒ ∵∠DBC =30°,BE =8, ∴4,DE BD ==…….……………………..4分 在直角三角形BDF 中∠DBC =30°, ∴DF =.…….……………………..5分 20.(1)证明:连结OC .∵CD 是O ⊙的切线, ∴OC ⊥CD. ∴90OCM ∠=︒.…….……………………..1分 ∵//CD AB ,∴180OCM COA ∠+∠=︒.D1图BA DEF∵AM ⊥CD, ∴90AMC ∠=︒.∴在四边形OAMC 中90OAM ∠=︒ .∵OA 为O ⊙的半径,∴AM 是O ⊙的切线 .…….……………………..2分 (2)连结OC ,BC .∵CD 是O ⊙的切线, ∴OC ⊥CD . ∴90OCM ∠=︒. ∵AM ⊥CD , ∴90AMC ∠=︒. ∴//OC AM .∴12∠=∠.∵OA= OC ,∴32∠=∠. 即BAC CAM ∠=∠.…….……………………..3分易知90ACB ∠=︒, ∴BAC CAM △∽△.…….……………………..4分∴AB ACAC AM=. 即224AC AB AM =⋅=.∴AC =.…….……………………..5分21.解:(1)800,400,40;…….……………………..3分(2)2010,1800.…….……………………..5分注:本题一空一分22.解:(1)如图,当C 、D 是边AO ,OB 的中点时,点E 、F 都在边AB 上,且CF AB ⊥. ∵OA =OB =8, ∴OC =AC=OD=4. ∵90AOB ∠=︒,2图∴CD =.…….……………………..1分在Rt ACF △中,∵45A ∠=︒,∴CF =∴16CDEF S ==矩形.…….……………………..2分(2)设,CD x CF y ==.过F 作FH AO ⊥于H . 在Rt COD △中,∵4tan 3CDO ∠=, ∴43sin ,cos 55CDO CDO ∠=∠=.∴45CO x =.…….……………………..3分 ∵90FCH OCD ∠+∠=︒, ∴FCH CDO ∠=∠.∴3cos .5HC y FCH y =⋅∠=∴45FH y . ∵AHF △是等腰直角三角形, ∴45AH FH y ==. ∴AO AH HC CO =++. ∴74855y x +=. ∴1(404)7y x =-.…….……………………..4分易知2214(404)[(5)25]77CDEF S xy x x x ==-=---矩形,∴当5x =时,矩形CDEF 面积的最大值为1007.…….……………………..5分 23.解:(1)由题意可知,∵(32)4(3)90m m m ∆=---=>错误!未找到引用源。
北京市朝阳区2010届高三第二学期统一考试(二)(英语)2010.05 第二部分: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,选出可以填人空白处的最佳选项,并在答题卡上将该项涂黑。
例:It’s so nice to hear from her again. , we last met more than thirty years ago.A.What’s more B.That’s to say C.In other words D.Believe it or not答案是D。
21.He raised his voice, ______ we still couldn't hear anything.A.so B.or C.but D.as 22.—What about ______ lecture you attended yesterday?—To tell the truth, it was too boring.I can't stand ______ lecture like that.A.a; the B.the; a C.the; 不填D.the; the 23.She tried two different methods, yet ______ of them seemed to work very well.A.neither B.none C.each D.both 24.—Ring me at six tomorrow morning, will you?—Why that early? I ____.A.will be sleeping B.will sleepC.have slept D.have been sleeping 25.It is still unclear ______ the little boy got the CD player to work.A.where B.what C.that D.how 26.They made a great effort to prepare the exhibition, ______ to achieve a big success.A.hoped B.hoping C.to hope D.hope 27.My dog made a mess in the living room, ______ really annoyed me.A.who B.when C.that D.which 28.You have a big mouth, Tom.You ___ have told everybody the secret.A.can'1 B.mustn't C.shouldn't D.mightn't 29.I'll try it again.Never in my life _____ such a particular difficulty.A.had I met B.have I met C.I had met D.I have met 30.—Have you seen your aunt lately?—Yes, in fac t I saw her yesterday.I ______ her for several months.A.haven't see B.didn't see C.hadn't seen D.don't see 31.Just hang the towel ______ the back of the chair so that it will dry soon.A.over B.for C.with D.through 32.______ colorful charts and graphs, he loaded a new software to help him.A.Create B.Created C.Creating D.To create 33.Students taking the course _____to finish their homework with the help of computers.A.are encouraged B.have encouragedC.are encouraging D.had been encouraged 34.You should explore your talents so us to find out ______ your real interests lie.A.what B.where C.which D.how 35.The traffic problems we are looking forward to seeing _____ have attracted the government's attention.A.solving B.solve C.solved D.to solve第一节单项填空(共15小题;每小题1分,共15分)21—25 CBAAD 26—30 BDCBC 31—35 ADABC北京市崇文区2010届高三第二学期统一练习(二)英语本试卷共150分,考试时间120分钟。
考试结束后,考生务必将答题卡交回。
第二部分: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,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
例:It's so nice to hear from her again.______, we last met more than thirty years ago.A.What's more B.That's to say C.In other words D.Believe it or not 答案是D。
21.As Susan stared at ______ piles of plastic in her recycling bin, ______ strong sense of responsibility made her stick to her recycling work.A.不填;不填B.不填; a C.the ; a D.the; the 22.Tom's mother kept telling him that he should work harder, but ______didn't help.A.he B.which C.it D.one23.Put yourself in situations where you're forced to communicate in English, ______ you'll see more progress over time.A.until B.or C.but D.and24.The United Nations are evaluating the damage caused in Haiti earthquake, while in Chile the government itself ______ the lead role.A.is taking B.was taking C.took D.had taken 25.What's your opinion of Mr.Li's request that we ______ spend half an hour reading English aloud every morning?A.would B.should C.must D.could 26.The actor still remembers the excitement in his class when a female classmate _____ for a key role in a Zhang Yimou film.A.is chosen B.s chosen C.chooses D.chose 27.It was the President himself______ opened the door.A.who B.when C.which D.where 28.Head coach Li Yan bursts into tears of joy when she sees Zhou Yang first _____ the finish line at the women's 1500m short track speed skating final.A.to cross B.having crossed C.cross D.crossed 29.The Mekong River Commission has found no evidence ______ the dams on the upper reaches have an influence on the water flow downstream.A.which B.that C.where D.what 30.in four different countries, Jessie is a typical third culture kid, the term of which refers to children who spend a period of time in one or more cultures.A.Bring up B.Having brought upC.Bringing up D.Brought up31 all his courage, he invites Celine.to get off the train with him.A.To gather B.Gathered C.Gathering D.Being gathered 32.I don't expect children to be rude, nor ______ them to be disobeyed.A.did I expect B.do I expect C.I expect D.I expected 33.In the past few months, the central bank governor and others ______ measures to prevent prices from rising too fast.A.called for B.are calling forC.have called for D.will call for34.the whole process for the studies of cancer took more than a year, the technology is moving so fast that it will soon take just weeks.A.How B.Because C.If D.While 35.Beijing took steps to limit the kinds of high-risk of borrowing money from the banks that can create the high price of housing, ______ happened in the United States.a.as B.that C.how D.while第一节单项填空(共15小题;每小题1分,共15分)21.C 22.C 23.D 24.A 25.B26.B 27.A 28.C 29.B 30.D31.C 32.B 33.C 34.D 35.A北京市丰台区2010年高三年级第二学期统一练习(二)英语试题2010.5答案是D。