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广东省梅州市2018届高三总复习质检(5月二模)理科数学试卷+Word版缺答案

广东省梅州市2018届高三总复习质检(5月二模)理科数学试卷+Word版缺答案
广东省梅州市2018届高三总复习质检(5月二模)理科数学试卷+Word版缺答案

梅州市高三总复习质检试卷(2018.5)

理科数学

第Ⅰ卷(共60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,只有一项是符合题目要求的.

1.全集U R =,{}|01A x x =<<,{}2|40B x x x =->,则()U A B =e( )

A .(0,4]

B .[]0,4

C .(0,1)

D .(,4]-∞

2.在复平面内,复数z 满足(1)|1|z i +=,则z 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

3.下列函数中,既是偶函数又在(0,1)上单调递增的是( )

A .cos y x =

B .y =

C .||2x y =

D .|lg |y x =

4.若中心在原点,焦点在y 则此双曲线的渐近线方程为( )

A .y x =±

B .12y x =±

C .y =

D .y x = 5.公元263年左右,我国数学家刘徽发现,当圆内接正多边形的边数无限增多时,正多边形的面积可无限逼近圆的面积,由此创立了割圆术,利用割圆术,刘徽得到了圆周率精确到小数点后面两位的近似值3.14,这就是著名的“徽率”.如图是利用刘徽的割圆术设计的程序

框图,则输出n 的值为 1.732≈,sin150.258?≈,sin 7.50.1305?≈)( )

A .12

B .24

C .48

D .96

6.下列选项中,说法正确的是( )

A .若随机变量η满足(1)5E η-=,(1)5D η-=,则()5E η=-,()5D η=

B .向量(2,2)a m =,(,21)b m m =-共线的充要条件是0m =

C .命题“*n N ?∈,13(2)2n n n ->+?”的否定是“0*n N ?∈,001

03(2)2n n n -<+?” D .已知函数()f x 在区间[],a b 上的图象是连续的,则命题“若()()0f a f b ?<,则()f x 在区间(,)a b 内至少有一个零点”的逆命题为假命题

7.若110a b

>>,有下列四个不等式:①33a b <;②21log 3log 3a b ++>;③

3322a b ab +>,则下列组合中全部正确的为( )

A .①②

B .①③

C .①④

D .②③

8.甲、乙两人在同一天上午8时至10时随机到达养老院为老人服务,并且工作1小时后离开,则两人在养老院相遇的概率为( )

A .34

B .13

C .78

D .35

9.四棱锥的三视图如图所示,则该棱锥的外接球的表面积为( )

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静安区高三年级英语期中(二模)测试卷(2018.5) I. Listening Comprehension Section A Directions: In Section A, you will hear ten short conversations between two speakers. At the end of each conversation, a question will be asked about what was said. The conversations and the questions will be spoken only once. After you hear a conversation and the question about it, read the four possible answers on your paper, and decide which one is the best answer to the question you have heard. 1. A. By the seaside. B. In a restaurant. C. In a supermarket. D. At home. 2. A. Driving the private car costs little. B. Taking subway requires a special pass. C. It’s more convenient to carry canned fish by pri vate cars. D. It’s uncomfortable to take the subway. 3. A. A phone company clerk. B. A mechanic. C. A travel agent. D. A marriage consultant. 4. A. The woman should go out to work. B. The woman should take charge of the cleaning herself. C. Maids are not very trustworthy these days. D. He contributes a lot to the family economy. 5. A. He is not clever enough for the math club. B. He doesn’t have enough enthusiasm to explore math. C. He lacks former experiences in math study. D. He will be sooner or later admitted into the math club. 6. A. 2. B. 3. C. 5. D. 7. 7. A. The woman was mistaken about where she lost her ipad. B. The woman’s ipad might be kept well in the library. C. There’s a very slight chance of finding back her ipad. D. Her ipad is for public use so she might as well buy a new one. 8. A. As a science fiction fan, she has already seen the film. B. She will go to deal with a dental problem then. C. She will go for a business appointment then. D. She is not very happy to go to see a film with the man. 9. A. Her personal feeling quite contrasts with the research finding. B. Reading books is teenagers’ favourite activity. C. All the researches are offering misleading information. D. Mobile phones have taken none of teenagers’ leisure time. 10. A. Previous customers have bought up the ovens on sale. B. Many other goods on sale are still available. C. The man can buy the oven through other channels. D. The oven is now sold at regular price. Section B Directions: In Section B, you will hear two passages and one longer conversation. After each passage or conversation, you will be asked several questions. The passages

2020-2021学年广东省高考数学二模试卷(理科)及答案解析

广东省高考数学二模试卷(理科) 一、选择题:共12小题,每小题5分,共60分。在每个小题给出的四个选项中,只有一项是符合题目要求的. 1.函数f(x)=+lg(6﹣3x)的定义域为() A.(﹣∞,2)B.(2,+∞)C.[﹣1,2)D.[﹣1,2] 2.己知复数z=(a∈R,i是虚数单位)是纯虚数,则|z|为()A.B.C.6 D.3 3.“p∧q是真命题”是“p∨q是真命题”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 4.已知sinα﹣cosα=,则cos(﹣2α)=() A.﹣ B.C.D. 5.己知0<a<b<l<c,则() A.a b>a a B.c a>c b C.log a c>log b c D.log b c>log b a 6.中国古代数学名著《九章算术》中记载了公元前344年商鞅督造一种标准量器﹣﹣商鞍铜方升,其三视图如图所示(单位:升),则此量器的体积为(单位:立方升)()

A.14 B.12+C.12+πD.38+2π 7.设计如图的程序框图,统计高三某班59位同学的数学平均分,输出不少于平均分的人数(用j表示),则判断框中应填入的条件是() A.i<58?B.i≤58?C.j<59?D.j≤59? 8.某撤信群中四人同时抢3个红包,每人最多抢一个,则其中甲、乙两人都抢到红包的概率为() A.B.C.D.

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2013年广东高考文科数学试题与答案解析

侧视图 正视图 2013年普通高等学校招生全国统一考试(广东卷) 数学(文科A 卷)解析 从今以后,高考数学不再愁~ 本试卷共4页,21小题,满分150分.考试用时120分钟. 锥体的体积公式:1 3 V Sh = .其中S 表示锥体的底面积,h 表示锥体的高. 一、选择题:本大题共10小题,每小题5分,满分50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2{|20,}S x x x x R =+=∈,2{|20,}T x x x x R =-=∈,则S T = A .{0} B .{0,2} C .{2,0}- D .{2,0,2}- 【解析】:先解两个一元二次方程,再取交集,选A 2(1,)+∞ D .[1,1)(1, - :对数真数大于零,分母不等于零,取交集,选C 3x yi +的模是 5 【解析】:复数相等用对比系数法得4,3x y ==-再开方,得5,选D. 4.已知51 sin( )25πα+=,那么cos α= A .25- B .15- C .15 D .25 【 解 析 】: 奇 变 偶 不 变 , 符 号 看 象 限 , 51sin( )sin(2+)sin cos 2225πππαπααα?? +=+=+== ??? ,选C. 5.执行如图1所示的程序框图,若输入n 的值为3,则输出s 的值是 A .1 B .2 C .4 D .7 【解析】注意临界点,选C. 6.某三棱锥的三视图如图2所示,则该三棱锥的体积是 图 1

A . 16 B .13 C .2 3 D .1 【解析】由三视图判断底面为等腰直角三角形,三棱锥的高为2,则111 =112=323 V ????,选B.注意公式,别记错! 7.垂直于直线1y x =+且与圆221x y +=相切于第一象限的直线方程是 A .0x y += B .10x y ++= C .10x y +-= D .0x y ++= 【解析】数形结合法,把图画出来,圆心到直线的距离等于1r =,直接法可设所求的直线 方程为:()0y x k k =-+>,再利用圆心到直线的距离等于1r =,求得k =选A. 8.设l 为直线,,αβ是两个不同的平面,下列命题中正确的是 A .若//l α,//l β C .若l α⊥,//l β 【解析】画出一个正方体,关注面内面外,关注相交线,选9.已知中心在原点的椭圆A .14322=+y x 1 .24 1 【解析】记好离心率公式,1,2,c a b === D. 10.设 a 是已知的平面向量且≠0 a ,关于向量 a 的分解,有如下四个命题: ①给定向量 b ,总存在向量 c ,使=+ a b c ; ②给定向量 b 和 c ,总存在实数λ和μ,使λμ=+ a b c ; ③给定单位向量 b 和正数μ,总存在单位向量 c 和实数λ,使λμ=+ a b c ; ④给定正数λ和μ,总存在单位向量 b 和单位向量 c ,使λμ=+ a b c ; 上述命题中的向量 b , c 和 a 在同一平面内且两两不共线,则真命题的个数是 A .1 B .2 C .3 D .4 【解析】法一: 利用向量加法的三角形法则,易的①是对的;利用平面向量的基本定理,易的②是对的;以 a 的终点作长度为μ的圆,这个圆必须和向量λ b 有交点,这个不一定能满足,③是错的;

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