2017学年第二学期3月考试试卷 2018.3
高三数学
一、填空题
1. 已知集合U R =，集合{}
|2,x M y y x R ==∈，集合
(){}
|lg 3N x y x ==-，则
()U C M N ?=
____________ 2. 已知幂函数
()
f x
过点
(，则()f x 的反函数为____________
3. 直线23x y +=的倾斜角是____________（用反三角表示）
4. 三阶行列式
4235
4
112
k ---第2行第1列元素的代数余子式为10-，则k =____________
5. 将一个半圆面围成圆锥的侧面，则其任意两条母线间夹角的最大值为____________
6. 某个不透明的袋中装有除颜色外其它特征完全相同的7个乒乓球（袋中仅有白色和黄色两种颜色的
球），若从袋中随机摸一个乒乓球，得到的球是白色乒乓球的概率是2
7，则从袋中一次随机摸两个球，
得到一个白色乒乓球和一个黄色乒乓球的概率是____________
7. 已知
{}n a 是首项为a ，公差为1的等差数列，
1n
n n a b a +=
，若对任意的*n N ∈，都有8n b b ≥成立，则
实数a 的取值范围是____________
8. 若双曲线()222
210,b 0x y a a b -=>>上存在四个不同的点A 、B 、C 、D ，使四边形ABCD 为菱形，则b a
的取值范围为____________
9. 动点(),P a b 在不等式组20
00x y x y y +-≤??
-≥??≥?表示的平面区域内部及其边界上运动，则
3
1a b w a +-=-的取值范围是____________
10. 在面积为2的ABC 中，E 、F 分别是AB 、AC 的中点，点P 在直线EF 上，则2
PC PB BC ?+的最小值是____________
11. 函数()()2sin 206f x x πωω?
?=+> ???图像上有两点(),A s t ，()()2,22B s t t π+-<<，若对任意
s R ∈，线段AB 与函数图像都有五个不同交点，若()f x 在[]12,x x 和[]34,x x 上单调递增，在
[]23,x x 上单调递减，且
()4321322
3x x x x x x -=-=
-，则1x 的所有可能值是____________
12. 设*
n N ∈，圆
()
222:0n n n C x y R R +=>与y 轴正半轴的交点为n P
，与曲线y =
的交点为
()
,n n n Q x y ，直线
n n
P Q 与x 轴的交点为
()
,0n A a ，若数列
{}n x 满足：13x =，143n n x x +=+，要使
数列
{}1n n a Pa +-成等比数列，则常数P=____________
二、选择题
13. 下列命题中，错误的是（ ）
A. 过平面α外一点可以作无数条直线与平面α平行
B. 与同一个平面所成的角相等的两条直线必平行
C. 若直线l 垂直平面α内的两条相交直线，则直线l 必垂直平面α
D. 垂直于同一个平面的两条直线平行
14. 已知z C ∈，i 是虚数单位，z 是z 的共轭复数，则下列说法与“z 为纯虚数”不等价的是（ ）
A. 2
0z <
B. 0z z +=
C. Re 0z =且Im 0z ≠
D.
i
z z =或
i
z z =-，且
z ≠
15. 若两个函数的图象经过若干次平移后能够重合，则称这两个函数为“同形”函数，给出下列四个函数：
()122log f x x
=，
()()
22log 2f x x =+，
232log f x
=，
()
42log 2f x =则“同形”函数是（ ）
A.
()
1f x 与
()
2f x
B.
()
2f x 与
()3f x
C.
()
2f x 与
()4f x D.
()
1f x 与
()
4f x 16. 正方形
1S 和
2
S 内接于同一个直角三角形ABC 中，如图所示，设A α∠=，若
1441
S =，
2440
S =，
则sin 2α的值为（ ）
A. 111
B. 110
C. 121
D. 19
三、解答题
17. 如图，等腰Rt AOB ，OA=OB=2，点C 是OB 的中点，AOB 绕BO 所在的边逆时针 旋转一周.
（1）求ABC 旋转一周所得旋转体的体积V 和表面积S ；
（2）和OA 逆时针旋转至OD ，旋转角为θ，[)
0,2θπ∈，且满足AC ⊥BD ，求θ.
18. 已知函数()()23
3sin sin cos f x x x x x R =+-
∈.
（1）求函数
()
f x 的最小正周期T 与单调递增区间；
（2）在ABC 中，若
()()1
2f A f B ==
，求角C 的值.
19. 如图1，OA 、OB 是某地一个湖泊的两条互相垂直的湖堤，线段CD 和曲线段EF 分别是湖泊中的一
座栈桥和一条防波堤，为观光旅游的需要，拟过栈桥CD 上某点M 分别修建与OA 、OB 平行的栈桥MG 、MK ，且以MG 、MK 为边建一个跨越水面的三角形观光平台MGK ，建立如图2所示的坐标系，
测得线段CD 的方程是()
220020x y x +=≤≤，曲线段EF 的方程是
()
200540xy x =≤≤，设点
M 的坐标为
(),s t ，记z s t =?（题中所涉及
的长度单
位均为米，栈桥和防波堤都不计宽度）. （1）求z 的取值范围；
（2）试写出三角形观光平台MGK 面积
MGK
S
关于z 的函数解析式，并求出该面
积的最小值.
20. 各项均为正数的数列{}n a 的前n 项和为n S ，满足()()2*21n n n S a a n N +=+∈.
（1）求数列
{}n a 的通项公式；
（2）求数列{}n b 满足()*112,2n n b b b n N +==∈，数列{}n c 满足()*
,21,2n n
n
a n k c k N
b n k =-?=∈?=?，数列
{}n c 的前n 项和为n T ，求n T ；
（3）若数列()2
*244n n P n n N =+∈，甲同学利用第（2）问中的n T ，试图确定
()*22k k T P k N -∈的值是否可以等于2018？为此，他设计了一个程序（如图），但乙同学认为这个程序如果被执行会是
一个“死循环”（即程序会永远循环下去，而无法结束），你是否同意乙同学的观点？请说明理由.
21. 如图，直线:l y kx b =+与抛物线2
2x py =（常数0p >）相交于不同的两点()11,A x y 、()22,B x y ，
且
21x x h
-=（h 为定值），线段AB 的中点为D ，与直线:l y kx b =+平行的切线的切点为C （不
与抛物线对称轴平行或重合且与抛物线只有一个公共点的直线称为抛物线的切线，这个公共点为切
点）.
（1）用k 、b 表示出C 点、D 点的坐标，并证明CD 垂直于x 轴； （2）求ABC 的面积，证明ABC 的面积与k 、b 无关，只与h 有关；
（3）小张所在的兴趣小组完成上面两个小题后，小张连AC 、BC ，再作与AC 、BC
平行的切线，切点分
别为E 、F ，小张马上写出了ACE 、BCF 的面积，由此小张求出了直线l 与抛物线围成的面积，你认为小张能做到吗？请你说明理由.
参考答案
1、(],0-∞
2、()()12,0f x x x -=≥
3、arctan 2π-
4、14-
5、60
6、10
21 7、()8,7-- 8、()1,+∞ 9、(
][),13,-∞-+∞ 10、2
3
11、,6
k k Z
π
π-
+∈ 12、2或4
13-16、BBCB
17、（1）43V π=，()
4225S π
=+；（2）23π或43π
18、（1）T π=，5,,1212k k k Z ππππ??-+∈????；（2）6π
19、（1）
75,502z ??∈??
??；（2）1400004002S z z ??
=+- ???，最小值为225平方米. 20、（1）n 1n a =+；（2）()221
2421,243,4324,21
433n
n n n n n k T k N n n n k *
+?++-=??=∈?++?+-=+??；（3）乙同学观点正确
21、（1）2,2pk C pk ?? ?
??，()2,D pk pk b +，,C D 的横坐
标相同，所以CD x ⊥轴；
（2）316h p ；（3）能，3
12h p
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
铜陵五中2018-2019学年度上学期高三10月月考 政治试题 （考查范围：《经济生活》第1-10课时间：90分钟满分：100分） 第Ⅰ卷（选择题共48分） 一、选择题：本题共24小题，每小题2分，共48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、商品一旦出现质量问题，危害到人们的安全，就必将被市场所淘汰。这是因为： ①丧失使用价值的商品，必定不能实现其价值 ②丧失价值的商品，必定会丧失其使用价值 ③商品是价值与使用价值的统一体 ④使用价值与价值相互依存、不可分割 A．①③ B．①④ C．②③ D．②④ 2、2018年2月1日，A国货币对B国货币汇率为1:6.25，2018年4月1日，汇率变为1:6.45。A 国M商品与其从B国进口的某商品配套使用，若汇率一直保持上述走势，不考虑其他因素，下列图示中，能够正确表达A国Ｍ商品需求变动趋势的是： 3、如果甲商品价格每变动2个单位会引起其需求量反向变动10个单位，丙商品价格每变动2个单位会引起丁商品需求量反向变动3个单位。由此判断，下列成立的是： ①甲商品为高档耐用品②丙丁两种商品为互补品 ③甲商品为生活必需品④丙丁两种商品互为替代品 A．①② B．②③ C．①④ D．③④ 4、凡勃伦效应是指消费者对一种商品需求的程度因其标价较高而增加。也就是说，消费者购买某类商品特别是奢侈品的目的并不仅仅是为了获得直接的物质满足和享受，更大程度上是为了获得心理上的满足。这告诉我们： ①商品价格并非是影响需求的唯一因素②奢侈品的价格不受价值规律的调节 ③消费心理对消费行为起着决定性作用④企业可据此效应探索新的营销策略 A．①② B．①④ C．②③ D．③④ 5、随着现代生活节奏加快，“懒人经济”应运而生，一大批快递公司、网上商城，甚至还有跑腿公
2018年浦东新区高三二模语文试卷 （时间150分钟，满分150分）2018.4 一积累运用（10分） 1.按要求填空（5分） （1），幽咽泉流冰下难。（白居易《》） （2）香远益清，亭亭净植，。（周敦颐《爱莲说》） （3）苏轼在《江城子》中有“相顾无言，惟有泪千行”的诗句，在柳永的《雨霖铃》中意境与之相似的一句是“，”。 2.按要求选择。（5分） （1）今年南汇桃花节，小刘去踏青觅胜，欲留影配诗，下列诗句和赏花场景不匹配的一项是（）。（2分） A.满树和娇烂漫红，万枝丹彩灼春融。 B.桃花一簇开无主，可爱深红爱浅红。 C.花开不并百花丛，独立疏篱趣无穷。 D.一树繁英夺眼红，开时先合占东风。 填入下面语段空白处的句子，最恰当的一项是（）。（3分） 文明是史，未进入文明之前是史前时期，未进入文明的文化是史前文化，未有字，焉有史？文明的标志当然是文字，，中国人大可底气十足地说，中华文明至少肇始于三千年前，其独一无二的持久性正有汉字之功。 A．而文明预示着文字有走向伟大的资本与长寿的禀赋 B．而文字预示着文明有走向伟大的资本与长寿的禀赋 C．而文明预示着文字有走向长寿与伟大的资本和禀赋 D．而文字预示着文明有长寿的资本与走向伟大的禀赋 二阅读（70分） （一）阅读下文，完成3-7题。（16分） 导演的限制与自由 ①导演的地位和作用问题，是近代戏剧史上一个争论不休的话题。主流派认为，剧本是舞台艺术的基础，导演则是剧本的诠释者和体现者。导演创作，可以发展或充实刷本，但却不能违背原作的立意与风格。从俄国的斯坦尼斯拉夫斯基到美国的贝拉斯科、中国的焦菊隐
等，都持这种观点。 ②也有人认为，导演是现代戏剧的核心，他可以随意篡改或解构剧本，甚至干脆不要据本，正如他有权设计布景，有权摆布演员，有权使用音响灯光一样。一些先锋派导演或理论家多持这种观点。如果把这种“导演中心”论限制在演出的范围内，还是有道理的，作为某种创新实验，更是无可厚非，但要推行于全部戏刷活动，恐怕就行不通了。 ③导演的职责是排戏。作为整个创作群体的一员，导演的基本职责是把剧本搬到舞台上去，使文学形象转化为可视可听可感的舞台形象。而剧本，特别是那些久经考验的经典剧目，往往包含着丰厚的文化内容，所以一个导演必须具备广博的社会、历史、人文知识，方能深入发握原作的思想内涵，充分展现其独特的艺术风貌。其次，导演是演出的组织者。为了把各种艺术成分组织起来，融为一体，创造出和谐、统一的舞台形象，导演必须谙悉舞台艺术的方方面面，具有较强的组织领导能力。第三，导演还承担着培养演员的责任。演员是舞台艺术的中心，当然也是导演的主要表现手段。选好演员，往往戏就成功了一半。好的导演，在排戏当中，能以各种方式启发演员，激起演员的创作欲望，从而大大提高演员的艺术表现能力。现代剧坛上的许多优秀演员，都是在一些著名导流的培养下，迅速成长起来的。 ④导演艺术是以刷本为基出，以完整和谐的舞台艺术为表现形式的二度创作。导演创作不仅受到剧本的制约，而且必须在舞台艺术和技术条件所能达到的范围内进行。可以说，导演是戏剧艺术里限制最多，也最富挑战性的工作，是名副其实的戴着脚镣跳舞。所以，《艺术形态学》的作者莫·卡冈说，“导演是最少独立性的艺术，因为它是其他所有艺术的上层建筑，而它控制其他这些艺术，使它们互相‘迁就”，最终创造出以它们的综合为基础的新的艺术。”
III. Reading Comprehension 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 Kettlebells do not hurt people. People do. A kettlebell will get your respect – the easy way or the hard way. Here is the easy way. 1. Get a medical clearance. Get clearance, especially from an orthopedist and a cardiologist. The latter is no joking matter, since kettlebell training can be extremely intense. 2. Always be aware of your surroundings. Find a training area with a non-slippery surface on which you are not afraid to drop a kettlebell. The area must be clear of objects you might trip over – including other kettlebells – or that you might hit with a kettlebell. There should be no people or animals in a radius where you could injure them. 3. Train barefoot or wear shoes with a flat, thin sole and room for the toes to spread. Training barefoot is superior for health and performance reasons. If you must wear shoes, wear Converse Chuck Taylors, Vibram Five Fingers, or similar shoes that have thin soles and do not pinch the toes together. You have sensory receptors on the bottoms of your feet that make you stronger and improve balance and coordination. Wearing traditional shoes diminishes the ability of these receptors to work properly, and therefore inhibits performance and can increase the risk of injury. Go native. 4. Never contest for space with a kettlebell. Do not try to save a rep that has gone wrong. Guide the kettlebell to fall harmlessly, and move out of the way if necessary. And remember, quick feet are happy feet. 5. Practice all safety measures at all times. Respect every kettlebell, even the lightest one. Always use perfect form picking up and setting down a kettlebell. The set is not over until the bell is safely parked.
2018年上海大同中学高三三模 第Ⅰ卷（共60分） 一、填空题（每题5分，满分60分，将答案填在答题纸上） 1.复数 122i i -+的虚部为 ． 2. 二项式4 x ? - ? 的展开式中常数项为 ． 3.甲、乙两个袋子中均装有红、白两种颜色的小球，这些小球除颜色外完全相同，其中甲袋装有4个红球、2个白球，乙袋装有1个红球、5个白球.现分别从甲、乙两袋中各随机抽取1个球，则取出的两球颜色不同的概率为 ．（用分数作答） 4.过点()6,3M -且和双曲线2222x y -=有相同的渐近线的双曲线方程为 ． 5.已知实数x 、y 满足1210x x y x y m ≥? ? -+≤??+≤? ，若此不等式组所表示的平面区域形状为三角形，则m 的取值范围为 ． 6.设圆锥底面圆周上两点A 、B 间的距离为2，圆锥顶点到直线AB AB 和圆 锥的轴的距离为1，则该圆锥的体积为 ． 7.等比数列 {}n a 的前n 项和为n S ，若对于任意的正整数k ，均有()lim k n k n a S S →∞ =-成立，则公比q = ． 8.三棱锥D ABC -及其三视图中的主视图和左视图如图所示，则棱BD 的长为 ． 9.将函数()sin 2y x ?=+的图象向左平移 4π个单位后得到得到函数图象关于点4,03π?? ??? 成中心对称，那么?的最小值为 ．
10.已知不等式20ln 0m m n n ???? -≥ ? ????? 对任意正整数n 恒成立，则实数m 取值范围是 ． 11.若[]0,απ∈，,44ππβ?? ∈-?? ?? ，R λ∈，满足：3 cos 202πααλ??---= ?? ? ， 3 4sin cos 0βββλ ++=，则cos 2αβ?? + ??? 的值为 ． 12.如图直角梯形ABCD 中，2AB BC ==，1CD =，//AB CD ，AD AB ⊥.点P 是直角梯形区域内任意一点，0PA PB ≤.点P 所在区域的面积是 ． 二、选择题：本大题共4个小题,每小题5分,共20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. 13.已知,a b R ∈，下列四个条件中，使“a b >”成立的必要而不充分的条件是（ ） A ．1a b >- B ．1a b >+ C. a b > D ．22a b > 14. 设等差数列 {}n a 的前n 项和为n S ，且满足190S >，200S <，则 11S a 、22S a 、3 3 S a 、…、19 19 S a 中最大项为（ ） A ． 88S a B ．99S a C. 1010 S a D ．1111S a 15.平面α外有两条直线m 和n ，如果m 和n 在平面α内的摄影分别是1m 和1n ，给出下列四个命题：①1 1m n m n ⊥?⊥；②11m n m n ⊥?⊥；③1m 与1n 相交?m 与n 相交或重 合；④1m 与1n 平行?m 与n 平行或重合；其中不正确的命题个数是（ ） A ．1 B ．2 C. 3 D ．4
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
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
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
江西省景德镇市高三上学期政治10月月考试卷 姓名:________ 班级:________ 成绩:________ 一、单选题 (共23题；共46分) 1. （2分）消费者总是想用同样多的货币买到更多的商品。但从长远来看，物价持续下降、通货紧缩却不是我们所希望的。因为这会导致（） A . 流通中的货币量增加→居民购买力下降→消费需求不足→生产萎缩 B . 流通中的货币量减少→社会投资减少→社会失业率上升→经济衰退 C . 生活资料价格下降→居民购买力上升→居民消费需求增加→物价上涨 D . 生产资料价格下降→企业生产成本降低→企业经济效益提高→经济过热 2. （2分） (2017高三上·山西月考) 中国人民银行决定自2015年6月28日起，对为“三农”或小微企业贷款达到一定标准的商业银行下调存款准备金率0.5个百分点；下调金融机构人民币存贷款基准利率0.25个百分点。这是央行今年以来首次采取“定向降准+降息”的组合，其目的是（） ①运用行政手段，进行逆向调控，适应新的常态②提供政策支持，发展薄弱环节，优化经济结构③发挥财政作用，增加货币供给，发展实体经济④降低融资成本，缓解企业压力，稳定经济增长 A . ②③ B . ①④ C . ①③ D . ②④ 3. （2分） (2017高一上·沈阳期中) 据研究，每一位消费者身后大约有250十亲朋好友。如果赢得了一位消费者的好感，就意味着赢得了250个人的好感；反之，如果得罪了一位消费者，也就意味若得罪了250个人。这就是商场中的“250定律”。据此，企业应该（） ①以消费者利益为经营目标，扩大市场 ②自觉遵守市场道德．坚持诚信经营 ③提高生产能力，确保市场经营
2018年上海中学高三英语模拟练习（一） Grammarand Vocabulary Section A Directions:After reading the passage below, fill in the blanks to make the passagecoherent and grammatically correct. For the blanks with a given word, fill ineach blank with the proper form of the given word; for the other blanks, useone word that best fits each blank. Today theStatue of Liberty is a beloved landmark. It ___1___(tower) above of theharbor of New York and is lovingly cared for by the National Park Service. Manythousands of visitors who visit Liberty Island each year might never suspectthat getting the statue ___2___(build) was a long slow struggle. More than acentury ago, it ___3___(be) the celebration of freedom and the commemorationof the friendship between America and France that inspired sculptor AugusteBartholdi and finally he went forward with designing the potential statue andpromoting the idea of building it. However, money was so big a problem ___4___was haunting the two governments from the beginning to the end. Donations forthe building of the statue first began coming in throughout France in 1875.Numerous people gave donations. A copper company donated the copper sheets thatwould be used to fashion the skin of the statue. Various donations werehelpful, ___5___ the cost of the statue kept riding. ___6___(face) with ashortfall of money, the French-American Union held a lottery. Merchants inParis donated prizes, and tickets were sold. The lottery was a success, butmore money was still needed. The sculptor Bartholdi eventually sold miniatureversions of the statue, ___7___ the name of the buyer engraved on them.Finally, in July 1880 the French-American Union announced that enough money hadbeen raised to complete the building of the statue. While theFrench had announced that the funds for the statues were in place in 1880, bylate 1882 the American donations, which would be needed to build the pedestal,were sadly lagging. The sculptor Bartholdi had travelled to America in 1871 topromote the idea of the statue. Despite Bartholdi’s efforts, t he idea of thestatue was difficult ___8___(sell). some newspapers, most notably the New YorkTimes, often criticized the statue as folly, and vehementlyopposed ___9___(spend) any money on it. The newspaper publisher JosephPulitzer, who had purchased a New Y ork City daily, The World, in the early1880s, took us the cause of the statue’s pedestal. He mounted an energetic funddrive, promising to print the name of each donor, ___10___ small the donation,Pulitzer’s audacious plan worked, and millions of people around the countrybegan donating whatever they could. In August1885, that final $100,000 for the statue;s pedestal had been raised.Construction work on the stone structure continued, and the next year theStatue of Liberty, which had arrived from France packed in crated, was erectedon top.
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 =--
2018-2019年行知中学高三下3月月考 一、填空题 1. 若复数z 满足2136z i -=+（i 为虚数单位），则z = 2. 函数()(1,1)x f x a b a b =+><-不经过第 象限 3. 已知""x k >是3 " 1"x <的充分不必要条件，则实数k 的取值范围是 4. 在报名的2名男教师和4名女教师中，选取3人参加义务献血，要求男、女教师都有，则不同的选取方式的种数为 （结果用数值表示）。 5. 设函数)0)(6cos()(>-=ωπ ωx x f ， 若)4 ()(π f x f ≤对任意的实数x 都成立，则ω的最小值为____ 6.如果已知极限1)1sin (lim =∞ →n n n ，那么极限____1 21 sin 5lim 2=--∞ →n n n n 7.已知P 为曲线? ??-=+=θθ θ2sin 21cos sin y x (θ是参数，πθ20<≤)上一点，则点P 到点)1,0(Q 距离的最小值是_______ 8、已知函数1)1()(2 -+++=b x b ax x f ，若对任意的R b ∈，函数x x f x F -=)()(总有两个不同的零点，则实数a 的取值范围是____ 9、若正三棱锥的主视图与俯视图如右图所示，则它的左视图的面积为______ 10. 若实数y x ,满足约束条件?? ? ??≥≤+≤k y y x x y 4 且y x z +=2的最小值是9-， 则实数k = 11. 在平面直角坐标系中，已知P B A ),1,0(),0,1(-是曲线21x y -=上的一个动点，BP BA ?的取值范围是____