搜档网
当前位置:搜档网 › 上海南洋中学高三数学试卷

上海南洋中学高三数学试卷

上海南洋中学高三数学试卷
上海南洋中学高三数学试卷

高三数学测试三

_____班,_____号,姓名_____________ 一、填空题(本大题满分56分,每小题4分)

1.若实数a 、b 满足a 2+b 2=1,则ab 的取值范围是______________.

2.设12,x x 是一元二次方程2260x ax a -++=的两个实根,则2212(1)(1)x x -+-的最小值 为______________. 3.设f (x )为定义在R 上的奇函数,当x ≥0时,f (x )=2x +2x +b (b 为常数),则f (-1)=______________. 4.已知集合A ={(x ,y )|-2

B x y x x y π

π=<<∈∈Z Z ,则A ?B 的真子集

的个数为______________. 5.函数()1

22

(23)

f x x x -=--+的单调递增区间是______________.

6.不等式0)2)(sin |(|<-+x x x 的解集为______________.

7.已知二次函数2()2()f x ax x c x =++∈R 的值域为[0,+∞),则)1(f 的最小值为__________. 8

21m αα-=-有解,则实数m 的取值范围是______________. 9.若y =f (2x -1)是周期为t 的周期函数,则函数y =f (x )的一个周期是______________. 10.已知()2sin(2)6f x x π

=+若006(),[,]542

f x x ππ

=∈,则0cos 2x =______________.

11.若正数a ,b 满足2+log 2a =3+log 3b =log 6(a +b ),则11

a b

+的值为______________.

12.设集合3

{|12}b a b a

+≤≤≤中的最大元素与最小元素分别为M ,m ,则M -m 的值为______.

13.若函数f (x )=x 2+a |x -1|在[0,+∞)上单调递增,则实数a 的取值范围是______________.

14.对于定义域和值域均为[0.1]的函数f (x ),定义f 1(x )=f (x ),f 2(x )=f (f 1(x )),…,f n (x )=f (f n -1(x )),

n =1,2,3,….满足f n (x )=x 的点称为f 的n 阶周期点.设12,0,2

()122, 1.

2

x x f x x x ?

≤≤??=??-<≤??,

则f 的n 阶周期点的个数是______________.

二、选择题(本大题满分20分,每小题5分)

15.把下列命题中的“=”改为“>”,结论仍然成立的是

( )

A .如果a b =,0c ≠,那么a b c c

= B .如果a b =,那么22

a b =

C .如果a b =,c d =,那么a d b c +=+

D .如果a b =,c d =,那么a d b c -=-

16.设p ,q 是两个命题,1

:

1p x

≤-,:|21|1q x +<,则p 是q

( ) A .充分非必要条件 B .必要非充分条件 C .充要条件 D .既非充分又非必要条件 17.定义在R 上的函数f (x ),当x ∈(-1,1]时,f (x )=x 2-x ,且对任意的x 满足f (x -2)=af (x )(常数a >0),

则函数f (x )在区间(5,7]上的最小值是 ( ) A .3

4

1a -

B .

34

1a C .

3

41a

D .3

41a

-

18.如图放置的边长为1的正方形P ABC 沿x 轴滚动(向右为

顺时针,向左为逆时针).设顶点P (x ,y )的轨迹方程是

()y f x =,则关于()f x 的最小正周期T 及()y f x =在

其两个相邻零点间的图像与x 轴所围区域的面积S 的正确结论是 ( ) A .T =4,S =π+1 B .T =2π,S =2π+1 C .T =4,S =2π+1 D .T =2π,S =π+1 三、解答题(本大题满分74分) 19.(本题满分12分)第1小题5分,第2小题7分.

已知函数2

1,(0),()21,(1).

x c cx x c f x c x -+<

=c f .

(1) 求实数c 的值; (2) 解不等式18

2

)(+>

x f .

20.(本题满分14分)第1小题6分,第2小题8分.

已知函数)1lg()(+=x x f .

(1) 若1)()21(0<--

(2) 若)(x g 是以2为周期的偶函数,且当10≤≤x 时,有()()g x f x =,求函数

)(x g y =])2,1[(∈x 的反函数.

21.(本题满分14分)第1小题6分,第2小题8分.

已知函数)4

sin()4

sin(sin )cot 1()(2

π

π

-

+++=x x m x x x f .

(1) 当0=m 时,求)(x f 在区间]4

3,8[π

π上的取值范围;

(2) 当2tan =α时,5

3

)(=

αf ,求m 的值. 22.(本题满分16分)第1小题5分,第2小题5分,第3小题6分.

已知函数222

()(,0)21

x x a a f x x x +-=∈≠-R ,其中a 为常数,且a <0.

(1) 若)(x f 是奇函数,求a 的取值集合A ;

(2) 当a =-1时,设)(x f 的反函数为)(1

x f

-,且函数)(x g y =的图像与)1(1+=-x f y 的

图像关于x y =对称,求)1(g 的取值集合B ;

(3) 对于问题(1)(2)中的A 、B ,当},,0|{B a A a a a a ??<∈时,不等式

)4(9102-<+-x a x x 恒成立,求x 的取值范围.

23.(本题满分18分)第1小题4分,第2小题6分,第3小题8分.

对于函数)(1x f 、)(2x f 、)(x h ,如果存在实数b a ,使得)()()(21x f b x f a x h ?+?=,那么称)(x h 为)(1x f 、)(2x f 的生成函数.

(1) 下面给出两组函数,)(x h 是否分别为)(1x f 、)(2x f 的生成函数?并说明理由; 第一组:x x f sin )(1=,x x f cos )(2=,)3

sin()(π

+

=x x h

第二组:x x x f -=21)(,1)(22++=x x x f ,1)(2+-=x x x h ;

(2) 设x x f 21log )(=,x x f 2

12log )(=,1,2==b a ,生成函数)(x h .若不等式

0)2()4(

(3) 设)0()(1>=x x x f ,)0(1

)(2>=

x x

x f ,取0,0>>b a ,生成函数)(x h 图像的最低点坐标为)8,2(.若对于任意正实数21,x x ,且121=+x x ,试问是否存在最大的常数m ,使

m x h x h ≥)()(21恒成立?如果存在,求出这个m 的值;如果不存在,请说明理由.

高三数学测试三答案

1、11

[,]22

-

. 2、8. 3、-3. 4、15. 5、[-1,1). 6、(0,+∞) 7、4. 8、[-1,2]. 9、2t . 10

. 11、108. 12

、5- 13、[-2,0].

14、2n . 15、D . 16、B . 17、D . 18、A .

19、解:(1)因为01c <<,所以2

0c c <<, ………………………2分

由2

3

9()18f c c =+=

得:1

2

c = ………………………5分 (2

)由102111

2x x ?

<

??+>+??

12x << ……………………8分

由4112211x x -?

??+>+??

得152

8x ≤< ………………………11分

所以,不等式的解集为5

)8

………………………12分

20、解:(1)由??

?>+>-0

10

22x x ,得11<<-x .

由1lg )1lg()22lg(01

22<=+--<+-x x

x x 得1011

22<<+-x x . ……3分

因为01>+x ,所以1010221+<-<+x x x ,3

13

2

<<-

x . 由??

?<<-<<-31

3

21

1x x 得31

32<<-x . ……6分 (2)当x ∈[1,2]时,2-x ∈[0,1],因此

)3lg()2()2()2()(x x f x g x g x g y -=-=-=-==. ……10分

由单调性可得]2lg ,0[∈y .

因为y x 103-=,所以所求反函数是x

y 103-=,]2lg ,0[∈x . ……14分

21、解:(1)当0=m 时,2

1

)2cos 2(sin 21sin )cot 1()(2

+-=

+=x x x x x f 2

1

)42sin(22+-=

πx 3分 又由]4

3,8[

π

π∈x 得]45,

0[4

2ππ

∈-

x ,故]1,2

2

[)42sin(-∈-πx 从而]2

2

1,0[21)42sin(22)(+∈+-=

πx x f 6分 (2)x m

x x x m x x x x f 2cos 2

2sin 2122cos 12cos 2cos sin sin )(2

-+-=-

+= 2

1

]2cos )1(2[sin 21++-=x m x

由2tan =α得54tan 1tan 22sin 2=+=ααα,53

tan 1tan 12cos 2

2-=+-=α

αα 12分

所以2

1

)]1(5354[2153+++=m ,解得2-=m 14分

22、解:(1)由必要条件,0,020)1()1(2

<=--=+-a a a f f 得 所以a=-1,

…………2分

下面 证充分性,当a=-1时,x

x

x f 2

12

1)(-+=, 任取R x x ∈≠,0,

02121121221212121)()(=-++-+=-++-+=

+---x

x

x x x x x x x f x f 恒成立, (4)

由A={-1}。

…………5分

(2)法一,当a=-1时,由,11

log 2121)(2

+-=-+==y y x x f y x

x 得 互换x ,y 得,11log )(2

1

+-=-x x x f …………6分

则2

log )1(21

+=+-x x x f ,

…………7分

从而1

22)(1

--==+x x x g y

…………8分 所以,4)1(-=g …………9分 即B={-4}

…………10分

法二、当a=-1时,由,)1(2

121)(1

得由+=-+=-x f y x f x

x ,1)(),(1-==+y f x y f x

互换x ,y 得1

221)()(1

--=-==+x x x f x g y

…………8分 所以4)1(-=g …………9分 即B={-4}

…………10分

(3)原问题转化为}4,1,0|{,0)910()4()(2-≠-≠<∈>+---=a a a a a x x a x a g

恒成立,则??

?≥<-0

)0(0

4g x

…………12分

或?

?

?>=-0)0(0

4g x

…………14分 则x 的取值范围为[1,4]。

…………16分

23、解:(1)第一组:)(x h 是)(1x f 、)(2x f 的生成函数,因为存在2

3

,21=

=

b a 使)(2

3

)(21)(21x f x f x h +?=

2分 第二组:)(x h 不是)(1x f 、)(2x f 的生成函数,因为若存在b a ,使得

)()()(21x f b x f a x h ?+?=,则有

)1()(1222+++-=+-x x b x x a x x b x a b x b a +-++=)()(2

故??

?

??=-=-=+111b a b b a ,而此方程无解,所以)(x h 不是)(1x f 、)(2x f 的生成函数 4分 (2) 依题意,有0)]2(log )2(log 2[)4(log )4(log 22

122

12<+++x x t x x 在]4,2[∈x 上有解

化简得:0)2(log )4(log 22

x

t 22log 1log 2++-

<在]4,2[∈x 上有解 7分

函数x

x x g 22log 1log 2)(++-

=在]4,2[∈x 的最大值为34

-

故实数t 的取值范围为)3

4

,(--∞ 10分 (3) 存在最大的常数m 为289

依题意,

x b ax x h +=)(,由ab x b ax 2≥+当且仅当x b

ax =即a

b

x =时等号成立得:

??

?

??==8

22ab a b

,解得:??

?==82b a ,故x x x h 82)(+= 13分 212

221

221121)4)(4(4)8

2)(82()()(x x x x x x x x x h x h ++?=++=2

12

22122

2116)(44x x x x x x +++?=2

1212212

22

116

]2)[(44x x x x x x x x +-++?

= 2

1212

2

2116]21[44x x x x x x +-+?=)820

(42121-+=x x x x 16分 正数21,x x ,满足121=+x x ,故4

1)2(

22121=+≤x x x x 当且仅当21

21==x x 时等号成立

函数)()(21x h x h 的最小值为289,故最大的常数m 为289. 18分

2018-2019学年上海中学高三上英语期中英语试卷

II.Grammar and Vocabulary Section B Recently,I flew to Las Vegas to attend a meeting.As we were about to arrive,the pilot announced with apology that there would be a slight delay before setting down.High desert winds had forced the airport to close all but one runway.He said that we would be circling the city for a few minutes waiting to land.We were also told to remain in our seats meanwhile with our seat belts(21)________(fasten) because there might be a few bumps.Well,that few minutes turned into about forty-five minutes, including a ride that would make a roller coaster(22)________(pale)by comparison. The movement was so sudden(23)________several passengers felt sick and had to use airsickness bags.(24)________you might guess,that’s not good thing to happen in a narrow space because it only serves to increase the discomfort of the situation. About twenty minutes into the adventure,the entire airplane became very quiet.There was now a sense of anxiety and fear that could be distinctly noticed.Every passenger simply held on for dear life… (25)________one.A baby was having a good time!With each bump of the aircraft,he(26)________let out a giggle of happiness.As I observed this,I realized that he didn’t know he was supposed to be afraid and worried about his safety.He(27)________thought about the past nor about the future.Those are (28)________we grown-ups have learned from experience.He was enjoying the ride because he (29)________(not teach)to fear it.(30)________(understand)this,I took a deep breath and sat back into my seat,pretending I was really on a roller coaster.I smiled for the rest of the flight.I even managed to giggle once or twice,which is much to the chagrin of the man sitting next to me holding the airsickness bag. C Section People become quite illogical when they try to decide what can be eaten and what cannot be eaten.If you lived in the Mediterranean,for instance,you would consider octopus a great__31__.You would not be able to understand why some people find it repulsive.On the other hand,your stomach would__32__ at the idea of frying potatoes in animal fat---the__33__accepted practice in many northern countries.The sad truth is that most of us have been brought up to eat certain foods and we__34__to them all our lives. No creature has received more praise and abuse than the common garden snail.Cooked in wine, snails are a great luxury in various parts of the world.There are countless people who,ever since their early years,have learned to__35__snails with food.My friend,Robert,lives in a country where snails are despised.As his flat is in a large town,he has no garden of his own.For years he has been asking me to collect snails from my garden and take them to him.The idea never appealed to me very much,but one day,after a heavy__36__,I happened to be walking in my garden when I noticed a huge number of snails taking a stroll on some of my__37__plants.Acting on a sudden impulse,I collected several dozen,put them in a paper bag,and took them to Robert.Robert was delighted to see me and__38__pleased with my little gift.I left the bag in the hall and Robert and I went into the living room where we talked for a couple of hours.I had forgotten all about the snails when Robert suddenly said that I must stay to dinner. 第1页/共8页

2014年上海市高考数学试卷(理科)

上海乌托邦教育 2014年上海市高考数学试卷(理科) 一、填空题(共14题,满分56分) 1.(4分)(2014?上海)函数y=1﹣2cos2(2x)的最小正周期是_________. 2.(4分)(2014?上海)若复数z=1+2i,其中i是虚数单位,则(z+)?=_________. 3.(4分)(2014?上海)若抛物线y2=2px的焦点与椭圆+=1的右焦点重合,则该抛物线的准线方程为 _________. 4.(4分)(2014?上海)设f(x)=,若f(2)=4,则a的取值范围为_________.5.(4分)(2014?上海)若实数x,y满足xy=1,则x2+2y2的最小值为_________. 6.(4分)(2014?上海)若圆锥的侧面积是底面积的3倍,则其母线与底面角的大小为_________(结果用反三角函数值表示). 7.(4分)(2014?上海)已知曲线C的极坐标方程为ρ(3cosθ﹣4sinθ)=1,则C与极轴的交点到极点的距离是 _________. 8.(4分)(2014?上海)设无穷等比数列{a n}的公比为q,若a1=(a3+a4+…a n),则q=_________.9.(4分)(2014?上海)若f(x)=﹣,则满足f(x)<0的x的取值范围是_________. 10.(4分)(2014?上海)为强化安全意识,某商场拟在未来的连续10天中随机选择3天进行紧急疏散演练,则选择的3天恰好为连续3天的概率是_________(结果用最简分数表示). 11.(4分)(2014?上海)已知互异的复数a,b满足ab≠0,集合{a,b}={a2,b2},则a+b=_________. 12.(4分)(2014?上海)设常数a使方程sinx+cosx=a在闭区间[0,2π]上恰有三个解x1,x2,x3,则x1+x2+x3= _________. 13.(4分)(2014?上海)某游戏的得分为1,2,3,4,5,随机变量ξ表示小白玩该游戏的得分,若E(ξ)=4.2,则小白得5分的概率至少为_________. 14.(4分)(2014?上海)已知曲线C:x=﹣,直线l:x=6,若对于点A(m,0),存在C上的点P和l上 的Q使得+=,则m的取值范围为_________. 二、选择题(共4题,满分20分)每题有且只有一个正确答案,选对得5分,否则一律得零分

上海高中高考数学知识点总结(大全)

上海高中高考数学知识点总结(大全) 一、集合与常用逻辑 1.集合概念 元素:互异性、无序性 2.集合运算 全集U :如U=R 交集:}{B x A x x B A ∈∈=且 并集:}{B x A x x B A ∈∈=?或 补集:}{A x U x x A C U ?∈=且 3.集合关系 空集A ?φ 子集B A ?:任意B x A x ∈? ∈ B A B B A B A A B A ??=??= 注:数形结合---文氏图、数轴 4.四种命题 原命题:若p 则q 逆命题:若q 则p 否命题:若p ?则q ? 逆否命题:若q ?则p ? 原命题?逆否命题 否命题?逆命题 5.充分必要条件 p 是q 的充分条件:q P ? p 是q 的必要条件:q P ? p 是q 的充要条件:p ?q 6.复合命题的真值 ①q 真(假)?“q ?”假(真) ②p 、q 同真?“p ∧q ”真 ③p 、q 都假?“p ∨q ”假 7.全称命题、存在性命题的否定 ?∈M, p(x )否定为: ?∈M, )(X p ? ?∈M, p(x )否定为: ?∈M, )(X p ? 二、不等式

1.一元二次不等式解法 若0>a ,02 =++c bx ax 有两实根βα,)(βα<,则 02<++c bx ax 解集),(βα 02>++c bx ax 解集),(),(+∞-∞βα 注:若0a 情况 2.其它不等式解法—转化 a x a a x <<-?a x a x >或a x - 0) () (>x g x f ?0)()(>x g x f ?>)()(x g x f a a )()(x g x f >(a >1) ?>)(log )(log x g x f a a f x f x g x ()()() >

2018届上海市各高中学校高三英语试题分类汇编--阅读理解B篇(带答案精确校对)

Section B Directions:Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the one that fits best according to the information given in the passage you have just read. (B) With the coming of big data age, data science is supposed to be starved for, of which the adaption can point a profound change in corporate competitiveness. Companies, both born-in the digital era and traditional world are showing off their skills in data science. Therefore, it seems to have been creating a great demand for the experts of this type. Mr Carlos Guestrin, machine learning professor from University of Washington argues that all software applications will need inbuilt intelligence within five years, making data scientists—people trained to analyze large bodies of information — key workers in this emerging “cognitive” technology economy. There are already critical applicat ions that depend on machine learning, a subfield of data science, led by recommendation programs, fraud detection system, forecasting tools and applications for predicting customer behavior. Many companies that are born digital—particularly internet companies that have a great number of real-time customer interactions to handle—are all-in when it comes to data science. Pinterest, for instance, maintains more than 100 machine learning models that could be applied to different classes of problems, and it constantly fields request from managers eager to use this resource to deal with their business problem. The most important factor weighing on many traditional companies will be the high cost of launching a serious machine-learning operation. Netflix is estimated to spend $150m a year on a single application and the total bills is probably four times that once all its uses of the technology are taken into account. Another problem for many non-technology companies is talent.Of the computer science experts who use Kaggle, only about 1000 have deep learning skills, compared to 100,000 who can apply other machine learning techniques, says Mr Goldbloom. He adds that even some big companies of this type are often reluctant to expend their pay scales to hire the top talent in this field. A third barrier to adapting to the coming era of “smart” applications, however, is likely to be

(完整)2018年上海高考数学试卷

2018年普通高等学校招生全国统一考试 上海 数学试卷 时间120分钟,满分150分 一、填空题(本大题共有12题,满分54分,第1~6题每题4分,第7~12题每题5分) 1.行列式41 25的值为_________. 2.双曲线2 214 x y -=的渐近线方程为_________. 3.在7(1)x +的二项展开式中,2x 项的系数为_________.(结果用数值表示) 4.设常数a R ∈,函数2()log ()f x x a =+。若()f x 的反函数的图像经过点(3,1),则 a =_________. 5.已知复数z 满足(1)17i z i +=-(i 是虚数单位),则z =_________. 6.记等差数列{}n a 的前n 项和为n S ,若30a =,6714a a +=,则7S =_________. 7.已知12,1,,1,2,32α? ?∈---???? 。若幂函数()f x x α=为奇函数,且在(0,)+∞上递减,则 α=_________. 8.在平面直角坐标系中,已知点(1,0)A -,(2,0)B ,E 、F 是y 轴上的两个动点,且2EF =u u u r ,则AE BF ?u u u r u u u r 的最小值为_________. 9.有编号互不相同的五个砝码,其中5克、3克、1克砝码各一个,2克砝码两个。从中随机选取三个,则这三个砝码的总质量为9克的概率是_________.(结果用最简分数表示)

10.设等比数列{}n a 的通项公式为1n n a q -=(*n ∈N ),前n 项和为n S 。若1 1lim 2n n n S a →+∞+=,则q =_________. 11.已知常数0a >,函数2()2x x f x ax =+的图像经过点6,5P p ?? ???、1,5Q q ??- ?? ?。若236p q pq +=,则a =_________. 12.已知实数1x 、2x 、1y 、2y 满足:22111x y +=,22221x y +=,121212 x x y y += ,则的最大值为_________. 二、选择题(本大题共有4题,满分20分,每题5分) 13.设P 是椭圆22 153 x y +=上的动点,则P 到该椭圆的两个焦点的距离之和为( ) (A ) (B ) (C ) (D )14.已知a ∈R ,则“1a >”是“11a <”的( ) (A )充分非必要条件 (B )必要非充分条件 (C )充要条件 (D )既非充分又非必要条件 15.《九章算术》中,称底面为矩形而有一侧棱垂直于底面的四棱锥为阳马。设1AA 是正六棱柱的一条侧棱,如图。若阳马以该正六棱柱的顶点为顶点、以1AA 为底面矩形的一边,则这样的阳马的个数是( ) (A )4 (B )8 (C )12 (D )16 16.设D 是含数1的有限实数集,()f x 是定义在D 上的函数。若()f x 的图像绕原点逆时针旋转6 π后与原图像重合,则在以下各项中,(1)f 的可能取值只能是( ) A 1

2020届上海市上海中学高三下学期数学综合练习卷

上海中学高三综合数学试卷06 2020.04 一.填空题 1.不等式13x x +<的解为____ 2.函数2()(2f x x x =<-)的反函数是____ 3.已知b+i ?2-ai(a,b ∈R )是实系数一元二次方程20x px q ++=的两根,则q=____ 4.将一个底面半径为4,高为2的圆锥锻造成一个球体,则此球体的表面积为____ 5.以3122012-?? ??? 为增广“矩阵的二元一次方程组的解为x ?y,则x ?y 这两个数的等比中项为____ 6.3名男生?3名女生和2位老师站成一排拍合照,要求2位老师必须站在正中间,队伍左右两端不能同时是一男生和一女生,则总共有____种排法. 7.已知函数f(2(),(),x x g x ax x ==-其中a>0,若对任意m ∈[1,2]都存在n ∈[1,2]使得f(m)f(n)=g(m)g(n)成立,则实数a 的取值集合为___. 8.在平面直角坐标系xOy 中,已知圆22:()(3)4,M x a y a -++-=过原点的动直线l 与圆M 交于A ?B 两点,若以线段AB 为直径的圆,与以M 为圆心?MO 为半径的圆始终无公共点,则实数a 的取值范围是____. 9.已知正数x ?y ?z 满足222 1,x y z ++=则1z xyz +的最小值为__. 10.已知向量a b r r 、满足:|2||3|2,a b a b -=+=r r r r 则a b ?r r 的取值范围是___. 11.已知△ABC 的面积为1,若BC=1,则当这个三角形的三条高的乘积取最大值时,sinA=___. 12.如图,已知正四面体ABCD 的棱长为2,棱AD 与平面α所成角[ ,],32 ππθ∈且顶点A 在平面α内,点B ?C ?D 均在平面α外,则棱BC 的中点E 到平面α的距离的取值范围是___. 二.选择题 13.已知集合,2 {|20}A x x x =∈-++≥N ,则满足条件A ∪B=A 的集合B 的个数为() A.4 B.7 C.8 D.16 14.已知函数()2sin()(4 f x x πω=+ω>0)的图像在区间(0,1]上恰好有三个最高点,则ω的取值范围是() 1927.[,)44 A ππ 913.[,)22 B ππ 1725.[,)44 C ππ D.[4π,6π) 15.已知a ?b 为实数,则“不等式|ax+b|≤1对所有满足|x|≤1都成立”是“|a|≤1且|b|≤1”的()

上海市进才中学2020届高三下学期3月月考英语试题 含解析

上海市进才中学2020届高三下学期3月月考 英语试题 II. Grammar and Vocabulary Section A Grammar and Vocabulary Universities Show “ Red Card” to English Majors An increasing number of Chinese universities are showing English the “red card” and sending it off the academic playing field. Just last month, five more universities announced that they would no longer offer English as a major, _____1_____ CET-4 (大学英语四级考试) will still be required for graduation. At first sight, it may appear that these universities are downgrading the importance of learning English. In actual fact, they are responding to the economic reality _____2_____English majors do not have good job prospects after graduation. And the same holds true for graduates in other Arts majors. According to MyCOS, the Beijing-based education research group, English graduates, along with those in history, literature and law, have _____3_____(low) starting salaries and lowest employment rate. Engineering, economics and science graduates have better job prospects and make twice as much money, with IT graduates ____4____ (make) the most. In _____5_____ 1980s, the Chinese government made the study of English a priority as part of its reform and opening-up policy. English majors were in high demand in business and in government because people with good English-language skills were so rare. Today, about 350 million Chinese have studied, or are studying, English. Ten million of them _____6_____ (consider) functionally bilingual. So, when an employer looks at a graduate’s résumé , it is assumed that he or she has good English skills. However, for those of you who truly love English, you should not be discouraged. The demand for English teachers is still high at all levels of education, _____7_____in public schools and in private institutions. Zhang Lu is probably familiar to most of you as the elegant young woman _____8_____ (see) standing or sitting slightly behind top government officials when they meet leaders from

2019年上海南模中学高三三模(2019.05)

南模中学高三三模数学试卷 2019.05 一. 填空题 1. 若集合{|310}A x x =+>,{||1|2}B x x =-<,则A B =I 2. 若复数z 满足 1i i z -=-,其中i 为虚数单位,则z = 3. 若函数1 ()1f x x =+(0x >)的反函数为1()f x -,则不等式1()2f x ->的解集为 4. 试写出71 ()x x -展开式中系数最大的项 5. 若函数4y =a ,最大值为b ,则2lim 34n n n n n a b a b →∞-=- 6. 已知平面上三点A 、B 、C 满足||AB =u u u r ,||BC =u u u r ||CA =u u u r ,则 AB BC BC CA CA AB ?+?+?u u u r u u u r u u u r u u u r u u u r u u u r 的值等于 7. 设P 是曲线tan x y θθ?= ???=? (θ为参数)上的一动点,O 为坐标原点,M 为线段OP 的中 点,则点M 的轨迹的普通方程为 8. 在等差数列{}n a 中,首项13a =,公差2d =,若某学生对其中连续10项进行求和,在 遗漏掉一项的情况下,求得余下9项的和为185,则此连续10项的和为 9. 从集合{1,2,3,4,5,6,7,8,9,10}A =中任取两个数,欲使取到的一个数大k 于,另一个数小 于k (k A ∈)的概率为 2 5 ,则k = 10. 已知数列{}n a 的通项公式为(1)2n n n a n =-?+(*n ∈N ),则这个数列的前n 项和为 n S = 11. 已知函数1 ()f x x x =- ,数列{}n a 是公比大于0的等比数列,且61a =, 1239101()()()()()f a f a f a f a f a a +++???++=-,则1a = 12. 定义在R 上的奇函数()f x ,当0x ≥时,1 2log (1)[0,1)()1|3|[1,) x x f x x x +∈??=??--∈+∞?,则关于x 的 函数()()F x f x a =-(01a <<)的所有零点之和为 (结果用a 表示) 二. 选择题 13. 已知非零向量a r 、b r ,“函数2 ()()f x ax b =+r r 为偶函数”是“a b ⊥r r ”的( )条件 A. 充分非必要 B. 必要非充分 C. 充要 D. 既不充分也不必要

【真题】2019年上海市高考数学试题含答案解析

2018年高考数学真题试卷(上海卷) 一、填空题 1.(2018?上海)行列式41 25 的值为 。 【答案】18 【解析】【解答】 41 25 =45-21=18 【分析】 a c b d =ad-bc 交叉相乘再相减。 【题型】填空题 【考查类型】中考真题 【试题级别】高三 【试题地区】上海 【试题来源】2018年高考数学真题试卷(上海卷) 2.(2018?上海)双曲线2 214 x y -=的渐近线方程为 。 【答案】12 y x =± 【解析】【解答】2 214x y -=,a=2,b=1。故渐近线方程为12 y x =± 【分析】渐近线方程公式。注意易错点焦点在x 轴上,渐近线直线方程为22 221x y b a -=时, b y x a =± 。 【题型】填空题 【考查类型】中考真题 【试题级别】高三

【试题地区】上海 【试题来源】2018年高考数学真题试卷(上海卷) 3.(2018?上海)在(1+x )7的二项展开式中,x 2项的系数为 。(结果用数值表示) 【答案】21 【解析】【解答】(1+x )7中有T r+1=7r r C x ,故当r=2时,2 7C = 76 2 ?=21 【分析】注意二项式系数,与各项系数之间差别。考点公式()n a b +第r+1项为T r+1=r n r r n C a b -。 【题型】填空题 【考查类型】中考真题 【试题级别】高三 【试题地区】上海 【试题来源】2018年高考数学真题试卷(上海卷) 4.(2018?上海)设常数a R ∈,函数2()log ()f x x a =+,若f x () 的反函数的图像经过点31(,),则a= 。 【答案】7 【解析】【解答】f x () 的反函数的图像经过点31(,),故()f x 过点3(1,),则()13f =, ()2log 1a +=3,1+a=23所以a=23-1,故a=7. 【分析】原函数()f x 与反函数图像关于y=x 对称,如:原函数上任意点()00,x y ,则反函数上 点为 ()00,y x 【题型】填空题 【考查类型】中考真题 【试题级别】高三 【试题地区】上海

上海市上海中学2019届高三上学期摸底考试英语试题 Word版含答案

2018-2019学年上海中学高三第一学期摸底考试 II.Grammar and Vocabulary 温馨提示:多少汗水曾洒下,多少期待曾播种,终是在高考交卷的一刹尘埃落地,多少记忆梦中惦记,多少青春付与流水,人生,总有一次这样的成败,才算长大。高考保持心平气和,不要紧张,像对待平时考试一样去做题,做完检查一下题目,不要直接交卷,检查下有没有错的地方,然后耐心等待考试结束。 Section A Direction: Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the other answer that best completes the sentence. 25.While I was waiting to enter ________ university, I saw advertised in a local newspaper a teaching post at a school in ________ suburb of London. A. /, a B. an, a C. a, the D. the ,the 26.In most cases, ________ a passenger has his ticket and managers to catch his train, he can reach his destination more comfortably than ________ he had to drive himself. A. once, if B. that ,if C. when, while D. where, when 27.The invention of the modern computer is one of the great contributions ________ to man’s efficiency. A. having ever been made B. ever been made C. ever made D. having ever made 28.I was not able to work out the problem ________ my teacher explained it. A. as B. unless C. until D. when 29.For him to be re-elected, what is essential is not that his policy works, but ________ the public believe that it does. A. / B. whether C. that D. if

上海市上海中学2019-2020学年高三第一学期数学期中考试卷(简答)

上海中学高三期中数学卷 2019.11 一. 填空题 1. 已知集合,,则 {|42}M x x =-<<2{|60}N x x x =--0y >25x y += 6. 若不等式的解集为或,则不等式 20px qx r -+≥{|2x x ≤-3}x ≥的解集为 2()(1)0qx px r x ++->7. 已知等差数列的首项及公差均为正数,令{}n a (,), n b =+*n ∈N 2020n <当是数列的最大项时, k b {}n b k =8. 若命题:“存在整数使不等式成立”是真命题,则实数的取x 2(4)(4)0kx k x ---? ()f x 1a +a 为

2016年上海市高考数学试卷理科(高考真题)

2016年上海市高考数学试卷(理科) 一、填空题(本大题共有14题,满分56分)考生应在答题纸相应编号的空格内直接填写结果,每个空格填对得4分,否则一律得零分. 1.(4分)设x∈R,则不等式|x﹣3|<1的解集为. 2.(4分)设z=,其中i为虚数单位,则Imz=. 3.(4分)已知平行直线l1:2x+y﹣1=0,l2:2x+y+1=0,则l1,l2的距离.4.(4分)某次体检,6位同学的身高(单位:米)分别为1.72,1.78,1.75,1.80,1.69,1.77,则这组数据的中位数是(米). 5.(4分)已知点(3,9)在函数f(x)=1+a x的图象上,则f(x)的反函数f﹣1(x)=. 6.(4分)在正四棱柱ABCD﹣A1B1C1D1中,底面ABCD的边长为3,BD1与底面所成角的大小为arctan,则该正四棱柱的高等于. 7.(4分)方程3sinx=1+cos2x在区间[0,2π]上的解为. 8.(4分)在(﹣)n的二项式中,所有的二项式系数之和为256,则常数项等于. 9.(4分)已知△ABC的三边长分别为3,5,7,则该三角形的外接圆半径等于. 10.(4分)设a>0,b>0,若关于x,y的方程组无解,则a+b的取值范围为. 11.(4分)无穷数列{a n}由k个不同的数组成,S n为{a n}的前n项和,若对任意n∈N*,S n∈{2,3},则k的最大值为. 12.(4分)在平面直角坐标系中,已知A(1,0),B(0,﹣1),P是曲线y= 上一个动点,则?的取值范围是. 13.(4分)设a,b∈R,c∈[0,2π),若对于任意实数x都有2sin(3x﹣)=asin(bx+c),则满足条件的有序实数组(a,b,c)的组数为.14.(4分)如图,在平面直角坐标系xOy中,O为正八边形A1A2…A8的中心,

上海高中高考数学真题与包括答案.doc

2018 年最新上海市高考数学试卷 参考答案与试题解析 一、填空题(本大题共有12 题,满分 54 分,第 1~6 题每题 4 分,第 7~12 题每题 5 分)考生应在答题纸的相应位置直接填写结果. 1.(4 分)(2018? 上海)行列式的值为18. 【考点】 OM:二阶行列式的定义. 【专题】 11 :计算题; 49 :综合法; 5R :矩阵和变换. 【分析】直接利用行列式的定义,计算求解即可. 【解答】解:行列式 =4× 5﹣ 2× 1=18. 故答案为: 18. 【点评】本题考查行列式的定义,运算法则的应用,是基本知识的考查. 2.(4 分)(2018? 上海)双曲线﹣ y2=1 的渐近线方程为±. 【考点】 KC:双曲线的性质. 【专题】 11 :计算题. 【分析】先确定双曲线的焦点所在坐标轴,再确定双曲线的实轴长和虚轴长,最后确定双曲线的渐近线方程. 【解答】解:∵双曲线的 a=2,b=1,焦点在 x 轴上 而双曲线的渐近线方程为y=± ∴双曲线的渐近线方程为y=± 故答案为: y=± 【点评】本题考察了双曲线的标准方程,双曲线的几何意义,特别是双曲线的渐近线方程,解题时要注意先定位,再定量的解题思想 3.( 4 分)(2018? 上海)在( 1+x)7的二项展开式中, x2项的系数为21 (结果用数值表示). 【考点】 DA:二项式定理. 【专题】 38 :对应思想; 4O:定义法; 5P :二项式定理. 【分析】利用二项式展开式的通项公式求得展开式中x2的系数.

【解答】解:二项式( 1+x)7展开式的通项公式 为 T r+1=? x r, 令r=2 ,得展开式中 x2的系数为 =21.故答案为: 21. 【点评】本题考查了二项展开式的通项公式的应用问题,是基础题. 4.(4 分)(2018? 上海)设常数a∈ R,函数 f ( x)=1og2( x+a).若 f (x)的反函数的图象经过点( 3,1),则 a= 7. 【考点】 4R:反函数. 【专题】11 :计算题;33 :函数思想;4O:定义法;51 :函数的性质及应用.【分析】由反函数的性质得函数 f (x)=1og2(x+a)的图象经过点(1,3),由此能求出 a. 【解答】解:∵常数 a∈R,函数 f (x)=1og2(x+a). f (x)的反函数的图象经过点(3, 1), ∴函数 f ( x)=1og2( x+a)的图象经过点( 1,3), ∴log 2(1+a)=3, 解得 a=7. 故答案为: 7. 【点评】本题考查实数值的求法,考查函数的性质等基础知识,考查运算求解能力,考查函数与方程思想,是基础题. 5.(4 分)(2018? 上海)已知复数 z 满足( 1+i )z=1﹣7i (i 是虚数单位),则|z|=5. 【考点】 A8:复数的模. 【专题】 38 :对应思想; 4A :数学模型法; 5N :数系的扩充和复数. 【分析】把已知等式变形,然后利用复数代数形式的乘除运算化简,再由复数求模公式计算得答案. 【解答】解:由( 1+i )z=1﹣7i , 得,

相关主题