高考二轮复习限时训练15

合集下载

2015年高考语文(人教通用) 二轮复习限时对点规范训练共6章15份

目录限时对点规范训练论述类文本选择题 (1)限时对点规范训练1 文言实词理解 (5)限时对点规范训练2 文言语句翻译 (10)限时对点规范训练1 分析概括古诗的思想感情 (13)限时对点规范训练2 准确判断古诗所用的表现手法 (15)限时对点规范训练1 分析小说的结尾 (18)限时对点规范训练2 分析概括人物形象 (22)限时对点规范训练3 分析小说中物象和次要人物的作用 (27)限时对点规范训练1 筛选并整合文中重要信息 (32)限时对点规范训练2 概括并分析传主的精神品质及其具体表现 (37)限时对点规范训练3 探究 (42)限时对点规范训练1 语句补写 (47)限时对点规范训练2 仿写句子 (50)限时对点规范训练3 得体 (52)限时对点规范训练4 图文转换 (55)第1章论述类文本阅读限时对点规范训练论述类文本选择题(用时：45分钟满分：30分)比对下列选项与原句意思是否一致。

如不一致，请说明理由。

(21分，每题3分)1．选项：(2014·安徽卷第3题B项)古代思想家反对“文胜质”的倾向，认为繁杂的技术具有炫目的迷惑性，“炫技”势必干扰人们对于“道”的持续关注。

原句：古代思想家认为，繁杂的技术具有炫目的迷惑性，目迷五色可能干扰人们对于“道”的持续注视。

他们众口一词地告诫“文胜质”可能导致的危险，这是古代思想家的人文情怀。

当然，这并非号召艺术拒绝技术，而是敦促文化生产审慎地考虑技术的意义：如果不存在震撼人心的主题，繁杂的技术只能沦为虚有其表的形式。

对比结果：不一致理由：选项把“众口一词地告诫”直接换成“反对”；原文是“可能”，到选项中变为“势必”，这是错误的。

2．选项：(2013·天津卷第7题B项)“微博粉丝”和传统“粉丝”都能获得一种投射在偶像身上的替代性满足，在追星的过程中实现自我认同。

原句：换句话说，“粉丝”对偶像“评论”，为其争取人气，照亮星途，既能获得一种投射在偶像身上的替代性满足，也是另一种形式的自我实现。

安徽2021年高考英语二轮小专题复习落实应用之夹叙夹议型完形填空Word版含答案

专题限时训练(二)[夹叙夹议型完形填空](限时：每篇15分钟)AFor a long time I saw happiness as a huge banner (旗帜)across the finish line of a long race. I felt that only when I __1__ certain things could I finally be happy in my life. Most of the time I felt like a tortoise believing that being slow and __2__ would win the race. At other times I would __3__ like a rabbit trying different side roads at a dangerous speed hoping to reach that banner a little faster. __4__，I began to see that no matter how long I raced towards it, the banner was never any __5__.I finally decided one day to sit down and take a break. It was then that I saw my __6__ sitting beside me.It had been with me as I __7__ hard to support my family, as I played with my children and heard their__8__ and even when I was sick with my wife at my side looking after me. It had been with me as I raced towards that stupid banner. I just didn't have the __9__ to see it. There is an old Chinese proverb that says, “Tension is what you think you should be. __10__ is who you are.”Perhaps we all should stop our race towards the __11__ life we think we should have and __12__ the life we have now. Happiness will never be found under some banner far away. It will be found in your own heart, soul and mind. It will be found when you __13__ that others love you just as you do. Don't be a tortoise or a rabbit when it comes to your happiness. Be a playful puppy and carry your stick of __14__ with you everywhere you go. __15__ yourself out of the race and realize that when it comes to love and happiness, you are already there.1. A．forgot B．missedC．overcame D．accomplished2. A．safe B．steadyC．calm D．quiet3. A．act B．runC．jump D．walk4. A．Generally B．GraduallyC．Unfortunately D．Firstly5. A．clearer B．lowerC．closer D．smaller6. A．happiness B．goalC．success D．friendship7. A．studied B．foughtC．exercised D．worked8. A．laughter B．complaintsC．stories D．breathing9. A．courage B．chanceC．wisdom D．strength10．A.Stress B．RelaxationC．Failure D．Pain11. A．real B．perfectC．common D．colourful12. A．enjoy B．changeC．improve D．create13. A．realize B．believeC．hope D．admit14. A．sorrow B．responsibilityC．fortune D．joy15. A．Carry B．MakeC．Push D．TakeBI hadn't even got a chance to enter the store before an African American woman approached me and asked if I would help her return an item (商品). The item she had __1__ was intended for her daughter, but she had already received a similar one. The lady __2__ to exchange the item for something else in the store but she was told she needed an ID or the deal could not take place. I went to the __3__ with the woman so she could use my ID.The sales associate immediately started accusing her of asking the first __4__ person she saw to help her. Although that was __5__，I didn't understand why it mattered. After all, not everyone is given the opportunity to __6__ an ID in this country.Then, we asked to speak with a manager, who explained that there was no __7__ to return the item without a receipt and then went on to say the woman could not __8__ she purchased the item.“If I, a young white female, were to enter the store and request you to make an exchange without a receipt, I would not be __9__ the privilege—as I have proof from the past，” I said. He must have realized at that moment what he had done, because he __10__ to exchange the item.There are many valuable lessons in the story. The first is to help a stranger in need. I __11__ when the woman asked for my help, but __12__ in my head I asked myself, “Why not? What valid __13__ do I actually have？” I had none, so I helped her.The second lesson is not to judge a book by its __14__. The woman looked poor, but she __15__ the same treatment as anyone else did.1．A.purchased B．shownC．lost D．mended2. A．managed B．wantedC．refused D．promised3. A．counter B．departmentC．market D．window4. A．fair B．familiarC．impossible D．random5. A．wrong B．trueC．reasonable D．meaningful6. A．leave B．payC．find D．obtain7. A．request B．placeC．way D．need8. A．answer B．proveC．support D．admit9. A．ordered B．askedC．denied D．given10. A．agreed B．preparedC．failed D．remembered11. A．struggled B．wonderedC．hesitated D．nodded12. A．totally B．graduallyC．hardly D．quickly13. A．feelings B．goalsC．reasons D．ideas14. A．design B．coverC．content D．price15. A．deserved B．requiredC．received D．appreciatedCI used to believe in the American Dream，which meant a job，a mortgage(按揭)，credit cards, and success.I wanted it and worked towards it like everyone else, all of us __1__ chasing the same thing.One year, through a series of unhappy events, it all fell __2__．I found myself homeless and alone.I had my truck and $56. I __3__ the countryside for some place I could rent for the __4__ possible amount.I came upon a shabby house four miles up a winding mountain road over the Potomac River in West Virginia.It was __5__，full of broken glass and rubbish.I found the owner, rented it，and cleared a corner to camp in.The locals knew nothing about me，but slowly, they started teaching me the __6__ of being a neighbour.They dropped off blankets，candles，and tools，and began __7__ around to chat. They started to teach me a belief in a __8__ American Dream—not the one of individual achievement but of neighbourliness.What I had believed in, all those things I thought were __9__ for a civilized life, were non-existent in this place.Up on the mountain, my most valuable possessions were my __10__ with my neighbours.Four years later, I moved back into __11__．I saw many people were having a really hard time, __12__ their jobs and houses.I managed to rent a big enough house to __13__ a handful of people. There are four of us now in the house，but over time I've had nine people come in and move on to other places.We'd all be in __14__ if we hadn't banded together.The American Dream I believe in now is a shared one.It's not so much about what I can get for myself；it's about __15__ we can all get by together.1．A.separately B．equallyC．violently D．naturally2．A.off B．apartC．over D．out3．A.crossed B．leftC．toured D．searched4．A.fullest B．largestC．fairest D．cheapest5．A.occupied B．abandonedC．emptied D．robbed6．A.benefit B．lessonC．nature D．art7．A.sticking B．lookingC．swinging D．turning 8．A.wild B．realC．different D．remote9．A.unique B．expensive C．rare D．necessary10．A.cooperation B．relationships C．satisfaction D．appointments 11．A.reality B．society C．town D．life12．A.creating B．losing C．quitting D．offering13．A.put in B．turn inC．take in D．get in14．A.yards B．shelters C．camps D．cottages15．A.when B．what C．whether D．how专题限时训练(二)A【要点综述】本文是夹叙夹议文。

【江西专用】2014届高考语文二轮复习高频考点训练(15)及答案解析

高频考点训练(十五)时间：25分钟分值：100分每日必练 15分钟限时训练1．(2013·浙江省温州中学第三次模拟)下列词语中加点的字，注音全都正确的一项是( )A．搅．(jiǎo)拌甄．(zhēn)选不旋踵．(zhǒng) 令人咋．(zà)舌B．挟．(xiã)制渐．(jiān)染紧箍．(gū)咒插科打诨．(hún)C．机杼．(zhù) 抹．(mò)墙露．(lòu)马脚刨．(páo)根究底D．连累．(lěi) 雾霾．(mán)超负荷．(hâ) 焚膏继晷．(guǐ)解析A．令人咋(zã)舌。

B.插科打诨(hùn)。

D.雾霾(mái)。

答案 C2．(2013·天津市第三次六校联考)下列词语中错别字最多的一组是( )A．发轫一柱香文采蜚然树倒猢狲散B．纹身百纳衣急待解决苛政猛于虎C．不啻爆冷门铩羽而归抹一鼻子灰D．稼接编者案两全齐美图穷匕首现解析A．一炷香；文采斐然。

B.文身；百衲衣；亟待解决。

C.正确。

D.嫁接；编者按；两全其美；图穷匕首见。

答案 D3．(2013·山西省康杰中学第八次模拟)下列各句中，加点的成语使用恰当的一项是( )A．目前国内整形机构的水平良莠不齐．．．．，做整形手术风险很高，据统计，美容整形业连续三年成为消费者投诉的热点。

B．安倍晋三上台后，要求修改《防卫计划大纲》，计划从美国购买“全球鹰”无人机和“鱼鹰”运输机，其危言危行．．．．必将加剧钓鱼岛危机。

C．针对每年节节攀升的茅台酒价格，贵州茅台公司高层要求各地经销商保持冷静，不要将现存茅台酒束之高阁．．．．，等待高价出售。

D．领导干部学习应始终本着学无常师．．．．的态度，多方请教，不断学习，做到“专”与“博”结合，使知识结构更加合理，个人素质全面提升。

解析A．良莠不齐：比喻好人坏人混杂在一起。

2020新课标高考语文二轮总复习专题限时训练：2-8 名篇名句默写 Word版含解析

[课时训练]限时练(三十)1．补写出下列句子中的空缺部分。

(1)王湾《次北固山下》中，“______________，______________”两句写拂晓行船的情景，作者无意说理，却在描写景物、节令之中，蕴含着一种自然的理趣。

(2)杜牧《阿房宫赋》中“________________，________________，______________”连用整齐的短句，写秦朝统治者大肆挥霍从六国搜刮来的珍宝，极不珍惜。

【答案】(1)海日生残夜江春入旧年(2)鼎铛玉石金块珠砾弃掷逦迤2．补写出下列句子中的空缺部分。

(1)苏轼《赤壁赋》中，“__________________，__________________”两句生动形象地描绘出月亮在夜空中缓慢移动的状态，逼真传神。

(2)辛弃疾《永遇乐·京口北固亭怀古》中，写古代英雄叱咤风云、驰骋疆场的名句是“______________，________________”。

(3)《荀子·劝学》中，“_____________，_____________”两句强调了整天空想不如片刻学习收获大的道理。

【答案】(1)月出于东山之上徘徊于斗牛之间(2)金戈铁马气吞万里如虎(3)吾尝终日而思矣不如须臾之所学也3．补写出下列句子中的空缺部分。

(1)周敦颐在《爱莲说》中用“________________”和“________________”分别表达对菊花和牡丹的看法。

(2)李白在《蜀道难》中，用禽、兽都不能越过蜀道中的高山来侧面烘托蜀道之难的两句诗是“__________________，__________________”。

(3)在《赤壁赋》中，苏轼感觉自己“浩浩乎”“飘飘乎”的具体原因是作者与客在“水光接天”的环境下“________________，________________”。

【答案】(1)花之隐逸者也花之富贵者也(2)黄鹤之飞尚不得过猿猱欲度愁攀援(3)纵一苇之所如凌万顷之茫然4．补写出下列句子中的空缺部分。

高三二轮复习限时训练(一)

高考二轮复习限时训练（一）（时间：60分钟）班级姓名得分一、填空题：本大题共12小题，每小题5分，共60分。

1、复数ii4321+-在复平面上对应的点位于第__ 象限. 2、命题“2,220x R x x ∃∈++≤”的否定是3、设{}{}=⋂+==∈==B A x y y x B R x x y y A 则,2|),(,,|2 4、已知x 、y 的取值如下表：从散点图分析，y 与x 线性相关，且回归方程为 0.95y x a =+，则a = 5、若椭圆的焦距长等于它的短轴长，则椭圆的离心率等于____ ____。

6、如果执行右面的程序框图，那么输出的S = 7、把函数4cos()3y x π=++1的图象向左平移ϕ个单位，所得的图象对应的函数为偶函数，则ϕ的最小正值为8、如果实数x ,y 满足x 2+y 2=1,则（1+xy ）(1－xy )的最小值为9、已知实数x ，y 满足条件5003x y x y x -+⎧⎪+⎨⎪⎩≥≥≤，i z x y =+（i 为虚数单位），则|12i |z -+的最小值是．10、一枚半径为1的硬币随机落在边长为3的正方形所在平面内，且硬币一定落在正方形内部或与正方形有公共点，则硬币与正方形没有公共点的概率是11、若函数f (x )=e x -2x-a 在R 上有两个零点，则实数a 的取值范围是12、设函数)0](,[,321)1ln()(2>-∈+-+=t t t x x e x x f x ，若函数的最大值是M ，最小值是m ，则M+m=二、解答题：本大题共2小题，共30分。

13、（本小题满分15分）在ABC ∆中，角A 、B 、C 的对边分别为,,a b c ，已知向量33(cos ,sin ),22A A m = (cos ,sin ),22A An =且满足m n +=（Ⅰ）求角A 的大小；（Ⅱ）若,b c +=试判断ABC ∆的形状。

14、（本小题满分15分）已知圆C ：224x y +=.（1）直线l 过点()1,2P ，且与圆C 交于A 、B 两点，若||AB =l 的方程;（2）过圆C 上一动点M 作平行于x 轴的直线m ，设m 与y 轴的交点为N ，若向量OQ OM ON =+，求动点Q 的轨迹方程，并说明此轨迹是什么曲线.高考二轮复习限时训练（一）1、三2、2,220.x R x x ∀∈++>3、∅4、2.6 5 6、25507、32π 8、43 9 10、 π+21111、()+∞-,2ln 2212、6 二、解答题： 13、（1）3A π=———————————————————7分（2）ABC ∆为直角三角形。

高考数学大二轮复习专题一平面向量、三角函数与解三角形第二讲三角函数的图象与性质限时规范训练

第二讲三角函数的图象与性质1．(2019·豫南九校联考)将函数y ＝sin ⎝⎛⎭⎪⎫x －π4的图象上各点的横坐标伸长到原来的2倍(纵坐标不变)，再向右平移π6个单位，则所得函数图象的解析式为( )A ．y ＝sin ⎝ ⎛⎭⎪⎫x 2－5π24B ．y ＝sin ⎝ ⎛⎭⎪⎫x 2－π3C ．y ＝sin ⎝ ⎛⎭⎪⎫x 2－5π12 D.y ＝sin ⎝⎛⎭⎪⎫2x －7π12 解析：函数y ＝sin ⎝ ⎛⎭⎪⎫x －π4经伸长变换得y ＝sin ⎝ ⎛⎭⎪⎫x 2－π4，再作平移变换得y ＝sin ⎣⎢⎡⎦⎥⎤12⎝⎛⎭⎪⎫x －π6－π4＝sin ⎝ ⎛⎭⎪⎫x 2－π3.答案：B2．(2019·某某亳州一中月考)函数y ＝tan ⎝ ⎛⎭⎪⎫12x －π3在一个周期内的图象是( )解析：由题意得函数的周期为T ＝2π，故可排除B ，D.对于C ，图象过点⎝ ⎛⎭⎪⎫π3，0，代入解析式，不成立，故选A. 答案：A3．(2019·某某某某十校期末测试)要得到函数y ＝cos ⎝ ⎛⎭⎪⎫2x ＋π3的图象，只需将函数y ＝cos 2x的图象( )A ．向左平移π3个单位长度B ．向左平移π6个单位长度C ．向右平移π6个单位长度D ．向右平移π3个单位长度解析：∵y ＝cos ⎝ ⎛⎭⎪⎫2x ＋π3＝cos ⎣⎢⎡⎦⎥⎤2⎝ ⎛⎭⎪⎫x ＋π6，∴要得到函数y ＝cos ⎝ ⎛⎭⎪⎫2x ＋π3的图象，只需将函数y ＝cos 2x 的图象向左平移π6个单位长度．答案：B4．(2019·东北三省三校一模)已知函数f (x )＝3sin ωx ＋cos ωx (ω>0)的图象的相邻两条对称轴之间的距离是π2，则该函数的一个单调增区间为( )A.⎣⎢⎡⎦⎥⎤－π3，π6 B.⎣⎢⎡⎦⎥⎤－5π12，π12 C.⎣⎢⎡⎦⎥⎤π6，2π3D.⎣⎢⎡⎦⎥⎤－π3，2π3解析：由题意得2πω＝2×π2，解得ω＝2，所以f (x )＝2sin ⎝ ⎛⎭⎪⎫2x ＋π6.令－π2＋2k π≤2x ＋π6≤π2＋2k π(k ∈Z)，解得－π3＋k π≤x ≤π6＋k π.当k ＝0时，有x ∈⎣⎢⎡⎦⎥⎤－π3，π6.故选A.答案：A5．(2019·高考全国卷Ⅱ)若x 1＝π4，x 2＝3π4是函数f (x )＝sin ωx (ω>0)两个相邻的极值点，则ω＝( ) A ．2B.32 C ．1D.12解析：由题意及函数y ＝sin ωx 的图象与性质可知， 12T ＝3π4－π4，∴T ＝π，∴2πω＝π，∴ω＝2. 故选A. 答案：A6．(2019·某某某某一模)已知函数f (x )＝2sin ⎝ ⎛⎭⎪⎫ωx ＋π3的图象的一个对称中心为⎝ ⎛⎭⎪⎫π3，0，其中ω为常数，且ω∈(1,3)．若对任意的实数x ，总有f (x 1)≤f (x )≤f (x 2)，则|x 1－x 2|的最小值是( ) A ．1 B.π2C ．2D.π解析：∵函数f (x )＝2sin ⎝ ⎛⎭⎪⎫ωx ＋π3的图象的一个对称中心为⎝ ⎛⎭⎪⎫π3，0，∴π3ω＋π3＝k π，k ∈Z ，∴ω＝3k －1，k ∈Z ，由ω∈(1,3)，得ω＝2.由题意得|x 1－x 2|的最小值为函数的半个周期，即T 2＝πω＝π2.答案：B7．(2019·某某平遥中学调研)已知函数f (x )＝2sin(ωx ＋φ)(ω>0，|φ|<π)的部分图象如图所示，已知点A (0，3)，B ⎝ ⎛⎭⎪⎫π6，0，若将它的图象向右平移π6个单位长度，得到函数g (x )的图象，则函数g (x )图象的一条对称轴方程为( ) A ．x ＝π12B.x ＝π4C ．x ＝π3D.x ＝2π3解析：由题意知图象过A (0，3)，B ⎝ ⎛⎭⎪⎫π6，0，即f (0)＝2sin φ＝3，f ⎝ ⎛⎭⎪⎫π6＝2sin ⎝ ⎛⎭⎪⎫π6·ω＋φ＝0，又ω>0，|φ|<π，并结合图象知φ＝2π3，π6·ω＋φ＝π＋2k π(k ∈Z)，得ω＝2，所以f (x )＝2sin ⎝⎛⎭⎪⎫2x ＋2π3，移动后g (x )＝2sin ⎣⎢⎡⎦⎥⎤2⎝⎛⎭⎪⎫x －π6＋2π3＝2sin ⎝ ⎛⎭⎪⎫2x ＋π3，所以对称轴满足2x ＋π3＝π2＋k π(k ∈Z)，解得x ＝π12＋k π2(k ∈Z)，所以满足条件的一条对称轴方程是x ＝π12，故选A.答案：A8．(2019·某某某某适应性统考)已知A ，B ，C ，D ，E 是函数y ＝sin(ωx ＋φ)⎝⎛⎭⎪⎫ω>0，0<φ<π2一个周期内的图象上的五个点，如图所示，A ⎝ ⎛⎭⎪⎫－π6，0，B 为y 轴上的点，C 为图象上的最低点，E 为该函数图象的一个对称中心，B 与D 关于点E 对称，CD →在x 轴上的投影为π12，则ω，φ的值为( )A ．ω＝2，φ＝π3B.ω＝2，φ＝π6C ．ω＝12，φ＝π3D.ω＝12，φ＝π12解析：由题意知T ＝4×⎝⎛⎭⎪⎫π12＋π6＝π，所以ω＝2.因为A ⎝ ⎛⎭⎪⎫－π6，0，所以0＝sin ⎝ ⎛⎭⎪⎫－π3＋φ. 又0<φ<π2，所以φ＝π3.答案：A9．(2019·某某某某3月模拟)已知函数f (x )＝sin ⎝ ⎛⎭⎪⎫ωx －π6(ω>0)，f (0)＝－f ⎝ ⎛⎭⎪⎫π2，若f (x )在⎝⎛⎭⎪⎫0，π2上有且仅有三个零点，则ω的可能取值为( )A.23 B.2 C.143D.263解析：∵函数f (x )＝sin ⎝ ⎛⎭⎪⎫ωx －π6(ω>0)，f (0)＝－f ⎝ ⎛⎭⎪⎫π2， ∴sin ⎝ ⎛⎭⎪⎫－π6＝－sin ⎝ ⎛⎭⎪⎫π2ω－π6＝－12，∴π2ω－π6＝2k π＋π6或π2ω－π6＝2k π＋5π6，k ∈Z ，∴ω＝4k ＋23或ω＝4k ＋2，k ∈Z.∵函数f (x )在⎝⎛⎭⎪⎫0，π2上有且仅有三个零点，∴ωx －π6∈⎝ ⎛⎭⎪⎫－π6，ωπ2－π6，∴2π<ωπ2－π6≤3π，∴133<ω≤193，∴ω＝143或ω＝6.故选C.答案：C10．(2019·贺州一模)已知函数f (x )＝sin(2x ＋φ)(φ∈R)，若f ⎝ ⎛⎭⎪⎫π3－x ＝f (x )，且f (π)>f ⎝ ⎛⎭⎪⎫π2，则函数f (x )取得最大值时x 的可能值为( )A.π6B.π5C.π3D.π2解析：因为f ⎝ ⎛⎭⎪⎫π3－x ＝f (x )，即y ＝f (x )的图象关于直线x ＝π6对称，即函数f (x )在x ＝π6时取得最值，①当函数f (x )在x ＝π6时取得最大值时，又因为函数f (x )的周期为π，所以f ⎝ ⎛⎭⎪⎫π2<f ⎝ ⎛⎭⎪⎫π3＝f (π)，满足题意， ②当函数f (x )在x ＝π6时取得最小值时，又因为函数f (x )的周期为π，所以f ⎝ ⎛⎭⎪⎫π2>f ⎝ ⎛⎭⎪⎫π3＝f (π)，不满足题意，综合①②得：函数f (x )取得最大值时x 的可能值为π6.故选A. 答案：A11．(2019·某某一模)若函数f (x )＝sinωx2·sin ⎝⎛⎭⎪⎫ωx 2＋π2(ω>0)在⎣⎢⎡⎦⎥⎤－π3，π2内有且仅有一个最大值，则ω的取值X 围是( ) A ．(0,5)B.[1,5)C.⎝ ⎛⎭⎪⎫0，92 D.⎣⎢⎡⎭⎪⎫1，92 解析：f (x )＝sinωx2sin ⎝⎛⎭⎪⎫ωx 2＋π2＝12sin ωx ，当ωx ＝2k π＋π2，即x ＝2k π＋π2ω(k ∈Z)时函数取最大值，又函数f (x )在⎣⎢⎡⎦⎥⎤－π3，π2内有且仅有一个最大值，即有两种情况，一是区间⎣⎢⎡⎦⎥⎤－π3，π2内只有一个极值点，二是函数f (x )在区间⎣⎢⎡⎦⎥⎤－π3，π2内单调递增，所以有⎩⎪⎨⎪⎧π2≤ωπ2<5π2，－3π2<－ωπ3或⎩⎪⎨⎪⎧π2≥ωπ2，－π2≤－ωπ3，解得ω∈⎣⎢⎡⎭⎪⎫1，92或ω∈(－∞，1]，又∵ω>0，所以ω∈⎝ ⎛⎭⎪⎫0，92，故选C. 答案：C12．(2019·某某一模)函数f (x )＝sin(2x ＋θ)＋cos 2x ，若f (x )最大值为G (θ)，最小值为g (θ)，则( )A ．∃θ0∈R ，使G (θ0)＋g (θ0)＝πB ．∃θ0∈R ，使G (θ0)－g (θ0)＝πC ．∃θ0∈R ，使|G (θ0)·g (θ0)|＝πD ．∃θ0∈R ，使⎪⎪⎪⎪⎪⎪G (θ0)g (θ0)＝π解析：f (x )＝sin(2x ＋θ)＋cos 2x ＝cos θ·sin 2x ＋⎝ ⎛⎭⎪⎫sin θ＋12·cos 2x ＋12＝54＋sin θsin(2x ＋φ)＋12，所以G (θ)＝54＋sin θ＋12，g (θ)＝－54＋sin θ＋12， ①对于选项A ，G (θ0)＋g (θ0)＝54＋sin θ＋12－54＋sin θ＋12＝1，显然不满足题意，即A 错误，②对于选项B ，G (θ0)－g (θ0)＝54＋sin θ＋12＋54＋sin θ－12＝254＋sin θ∈[1,3]，显然不满足题意，即B 错误， ③对于选项C ，G (θ0)·g (θ0)＝⎝ ⎛⎭⎪⎫54＋sin θ＋12·⎝ ⎛⎭⎪⎫54＋sin θ－12＝1＋sin θ∈[0,2]，显然不满足题意，即C 错误，④对于选项D ，⎪⎪⎪⎪⎪⎪G (θ)g (θ)＝⎪⎪⎪⎪⎪⎪⎪⎪154＋sin θ－12＋1∈[2，＋∞)，即∃θ0∈R ，使⎪⎪⎪⎪⎪⎪G (θ0)g (θ0)＝π，故D 正确，故选D. 答案：D13．(2019·某某模拟)函数f (x )＝4cos x sin ⎝⎛⎭⎪⎫x ＋π6－1(x ∈R)的最大值为________．解析：∵f (x )＝4cos x sin ⎝ ⎛⎭⎪⎫x ＋π6－1＝4cos x ⎝ ⎛⎭⎪⎫32sin x ＋12cos x －1＝23sin x cos x ＋2cos 2x －1＝3sin 2x ＋cos 2x ＝2sin ⎝ ⎛⎭⎪⎫2x ＋π6，∴f (x )max ＝2. 答案：214．设函数f (x )＝A sin(ωx ＋φ)(A >0，ω>0)．若函数f (x )在区间⎣⎢⎡⎦⎥⎤π6，π2上具有单调性，且f ⎝ ⎛⎭⎪⎫π2＝f ⎝ ⎛⎭⎪⎫2π3＝－f ⎝ ⎛⎭⎪⎫π6，则函数f (x )的最小正周期为________．解析：∵f (x )在区间⎣⎢⎡⎦⎥⎤π6，π2上具有单调性，且f ⎝ ⎛⎭⎪⎫π2＝f ⎝ ⎛⎭⎪⎫2π3， ∴x ＝π2和x ＝2π3均不是f (x )的极值点，其极值应该在x ＝π2＋2π32＝7π12处取得，∵f ⎝ ⎛⎭⎪⎫π2＝－f ⎝ ⎛⎭⎪⎫π6，∴x ＝π6也不是函数f (x )的极值点，又f (x )在区间⎣⎢⎡⎦⎥⎤π6，π2上具有单调性， ∴x ＝π6－⎝⎛⎭⎪⎫7π12－π2＝π12为f (x )的另一个相邻的极值点，故函数f (x )的最小正周期T ＝2×⎝⎛⎭⎪⎫7π12－π12＝π.答案：π15．(2019·某某某某武邑中学模拟)将f (x )＝2sin ⎝⎛⎭⎪⎫ωx ＋π4(ω>0)的图象向右平移π4ω个单位，得到y ＝g (x )的图象，若y ＝g (x )在⎣⎢⎡⎦⎥⎤－π6，π4上为增函数，则ω的最大值为________．解析：将f (x )＝2sin ⎝ ⎛⎭⎪⎫ωx ＋π4(ω>0)的图象向右平移π4ω个单位，得到y ＝g (x )＝2sin ⎣⎢⎡⎦⎥⎤ω⎝ ⎛⎭⎪⎫x －π4ω＋π4＝2sin ωx 的图象，若y ＝g (x )在⎣⎢⎡⎦⎥⎤－π6，π4上为增函数，则满足T 4≥π4，即T ≥π，即2πω≥π，所以0<ω≤2，即ω的最大值为2.答案：216．已知函数f (x )＝2a sin(πωx ＋φ)⎝ ⎛⎭⎪⎫a ≠0，ω>0，|φ|≤π2，直线y ＝a 与f (x )的图象的相邻两个距离最近的交点的横坐标分别是2和4，现有如下命题： ①该函数在[2,4]上的值域是[a ，2a ]；②在[2,4]上，当且仅当x ＝3时函数取得最大值； ③f (x )的图象可能过原点．其中真命题的个数为________．解析：对于①，∵直线y ＝a 与函数f (x )＝2a sin(πωx ＋φ)的图象的相邻两个距离最近的交点的横坐标分别为2和4，∴结合图象可以看出，当a >0时，f (x )在[2,4]上的值域为[a ，2a ]，当a <0时，f (x )在[2,4]上的值域为[2a ，a ]，①错误；对于②，根据三角函数图象的对称性，显然x ＝2和x ＝4的中点是x ＝3，即当a >0时，f (x )在x ＝3处有最大值f (3)＝2a ，当a <0时，f (x )在x ＝3处有最小值f (3)＝2a ，②错误；对于③，f (0)＝2a sin φ，令f (0)＝0，得φ＝0，此时f (x )＝2a sin πωx ，由2a sin πωx ＝a 得sin πωx ＝22，则πωx ＝2k π＋π4(k ∈Z)或πωx ＝2k π＋3π4(k ∈Z)，∴x ＝2k ＋14ω(k ∈Z)或x ＝2k ＋34ω(k ∈Z)，∵直线y ＝a 与函数f (x )＝2a sin(πωx ＋φ)的图象的相邻两个距离最近的交点的横坐标分别为2和4，∴令⎩⎪⎨⎪⎧2k ＋14ω＝2，2k ＋34ω＝4，解得k ＝18∉Z ，即不存在这样的k 符合题意，③错误．综上，没有真命题．答案：0。

高考英语二轮复习方案专题限时集训(新课标湖南专用)15 完形填空第二节1 Word含解析

专题限时训练(十五)[完形填空第二节(一)](限时：每篇5分钟)(一)At one point along an open highway，I came to a crossroads with a traffic light.I was alone on the road by now，but 1.________ I drove up to the light，it turned red，and I braked to a halt.I looked left，right，2.________ behind me.Nothing.Not a car，no suggestion of headlights，but there I sat, waiting for the light to change，the only human being for at least a mile in any direction.I started wondering 3.________ I refused to run the light.I was not afraid of being caught by the police，because there was obviously 4.________ policeman anywhere around，and 5.________ certainly would have been no danger in going through it.Much later that night，the same question of why I'd stopped for that light came back to me.I think I stopped because it's part of a contract we all have with each other.It's not only the law，but it's 6.________ agreement we have，and we trust each other to honour it: we don't go through red lights.Like most of us，I'm more ready to be stopped 7.________ doing something bad by the social agreement that disapproves of it 8.________ by any law against it.(二)Whenever a disaster takes place，thousands of people start to contact various organizations and post to online groups in an effort to try to volunteer at 1.________ disaster site.Some2.________ jump into their cars and drive to the area.But 3.___ _____ most of these people don't realize is that spontaneous(自发的)volunteers 4.________ specific training can actually cause more problems rather than reduce them in a disaster situation.In disaster situations，volunteers 5.________ be mentally and physically prepared to work 16 hours a day or more in highly-stressed situations.6.________ may have to live in simple conditions，sleeping in a tent that they bring with them7.________ a gym with many people.And what happens if you get to the situation and discover you can't handle what is happening around you? Volunteers who show up untrained can get in the way rather 8.________ provide some help.So make sure you are trained if you want to be a volunteer.(三)Living in a new country means experiencing a different way of life.This is very exciting and interesting，1.________ it can also be a little challenging at times，because the cultures of all countries are unique.Culture is like 2.________ iceberg.You can see some parts of an iceberg—just like you can see some parts of a country's culture 3.________ you visit it.For example，you can see different ways 4.________ greeting people，hear different languages and observe different festivals and customs.However，a much bigger part of every iceberg is hidden under water.5.________ though this part of the iceberg is hard to see，it is very important—6.________ it，the iceberg would not exist.The same is true of culture.There are many aspects of it 7.________ you cannot see when you visit a different country，for example，the nature of friendship and the importance of time.8.________ will take a long time to understand those values and beliefs.(四)It is inevitable(不可避免的) for us to meet failure and success in everyday life.Most of us are eager for success and scared of failure.However，no one is always successful 1.________ also no one is always a failure.Then 2.________ to deal with failure and success in our life?On the one hand，“Failure is the mother of success.”If we sum 3.________ experiences and lessons after failure，maybe success will come.Nevertheless，if we lose heart and give up former efforts，we will not succeed. 4.________a word，the key to success is our hard struggle.On the other hand，success may cause failure，too.Generally speaking，success often adds confidence and satisfaction，5.________failure is accompanied by misery and sadness.But supposing 6.________ become selfsatisfied once we succeed and stop struggling. Then it's sure that failure will come.We should take 7.________ right attitude towards failure and success.To sum up，there is not an absolute limit between success and failure.8.________ is important is our struggle and attitude.(五)Living in modern society，most people are likely to be under great stress which caused by living and succeeding.1.________，a lot of psychological and social problems arise.To deal with stress effectively，one has to be well-prepared both 2.________ and physically.One has to establish the conception that stress is normal and it can be a motivation of success as long as people accept 3.________ existence.Since we cannot destroy stress，why can't we treat with it in 4.________ optimistic way? Stress is not a thing that we should be afraid of 5.________ what we should make full use of.One has to change the way he lives to reduce the influences 6.________ stress.Staying up late and drinking alcohol helps 7.________ but add the risk of getting worse.Keeping a regular calendar and following a healthy diet helps reduce its effects.Stress is not as frightening as it is described 8.________ people build the right conception of it and keep physical health.(六)Every living thing in an ecosystem depends in some way upon other living and nonliving things in the ecosystem.The living things in an ecosystem are 1.________ producers or consumers.Producers don't eat other living things.Producers make food.Green plants are called primary producers.Plants use nonliving nutrition，such as 2.________ chemicals in soil and water to help them make food.They use energy in sunlight to make food.They also use carbon dioxide in air to make food.Consumers are animals eating 3.________ living things.Animals 4._____ ___ only eat plants are called herbivores(食草动物)．Herbivores are primary consumers.Rabbits，mice, 5.________ planteating insects are primary consumers.Animals eating other animals are called carnivores(食肉动物)．Carnivores 6.________ bears and hawks are secondary consumers.Ecosystems also have decomposers(分解者)．Decomposers break 7.________dead plants，animals and animal wastes.They turn dead material and waste 8.________ chemical nutrition.Plants take in the nutrition with their roots.They use the nutrition to make more food.(七)There is very little time to waste if we agree that the function of education is to prepare us for life.So，while we can，we ought to concentrate 1.________ teaching children something really useful.Politeness is a mark of civilization.2.________ sooner children learn this，the better.In any case，a lot can be accomplished by a smile and good manners.Like it or not，our adult lives will be consumed by the struggle for money，but we don't make an effort to teach children 3.________ to manage it.So our schools have a duty to teach them this ability from the beginning.Children should learn to take care 4.________ their health.They should know that 5.________ they eat junk food，they will become fat and unhealthy.They should be very clear about 6.________ happens to their bodies when they drink or smoke.All of 7.________ are part of society.We have rights and responsibilities.We have to know a little bit of our history and geography，because we need to have an environment in which to relate to the people around us.Our schools should spend every moment they have telling this to our children: this is life，this is what you are going to face，8.________ this is how you deal with it.(八)In the letter，you asked me something about CCTV International.Now I will give you some information 1.________ TV International，2.________ was launched on September 25，2000，is the English-language channel of China Central Television.I like the channel and 3.________ are three reasons.To begin 4.________，it focuses on reporting about Chinese politics，economy，culture，tourism，customs，and society to its audience at home and abroad.Meanwhile，it covers international events.I can keep up with 5.________ has happened and what is going on around the world through st but not 6.________ ，we can practise our listening.In my opinion，CCTV International is 7.________ very useful channel.I spend much of my free time watching 8.________ programs and I hope you will be interested in it，too.专题限时训练(十五)(一)1. when/as考查状语从句的引导词。

专题02：新高考语言文字运用 Ⅰ(2)-2022年新高考语文二轮复习限时专题训练(教师版)

新高考语言文字运用Ⅰ（2）（教师版）时间：45分钟分值：55分(一)语言文字运用Ⅰ(本题共3小题，11分)阅读下面的文字，完成1～3题。

翩若惊鸿，婉若游龙，《洛神水赋》的舞者化身洛神，或拂袖起舞，或拨裙回转，或刚劲有力，或娉婷袅娜，整个舞蹈使端午祈福的美好愿景与惊艳众人的视觉效果高度统一。

除此之外，“端午奇妙游”的其他节目如《龙舟祭》《丽人行》等也让人▲，带给受众▲的观感和回甘绵长的余韵。

近年来，从《国家宝藏》到《典籍里的中国》，从《上新了，故宫》到《书简阅中国》，我们已经看到很多类似的节目。

这些节目在尊重历史、尊重文化的基础上，用匠心去挖掘传统文化中的精华，围绕传播和弘扬优秀传统文化为己任，激励了观众内心对民族历史、传统文化的热爱，更推动中国文化不断走出去。

我们相信，根植于传统文化的▲，用创新的形式和匠心为传统文化赋能，我们一定能让中国五千年的文明更加▲，让文化自信成为心底最基本、最持久的力量。

1.依次填入文中横线上的词语，全都恰当的一项是（3分）（）A.拍手称快耳目一新厚积薄发美轮美奂B.拍手称快焕然一新蓄势待发熠熠生辉C.叹为观止耳目一新厚积薄发熠熠生辉D.叹为观止焕然一新蓄势待发美轮美奂【答案】C【解析】叹为观止：赞美看到的事物好到极点。

拍手称快：拍掌叫好，多指愁恨得到消除。

从语境看，是节目令人赞美，故选择“叹为观止”。

耳目一新：听到的看到的都换了样子，感到很新鲜。

焕然一新：形容出现了崭新的面貌。

从语境看，主语是人，故选“耳目一新”。

厚积薄发：大量地积累，只择其精要少量地表露出来。

多用于称赞人学问深厚，学风严谨；也形容经过长时间的积累和准备而获得大的成功。

蓄势待发：积蓄势力或能量等待发作。

从语境看，形容“传统文化”应选“厚积薄发”。

熠熠生辉：形容光彩闪耀的样子。

美轮美奂：形容房屋高大美观，也形容装饰、布置等美好漂亮。

从语境看，形容“文明”应选“熠熠生辉”。

2.文中画波浪线的句子有语病，下列修改最恰当的一项是（3分）（）A.围绕传播和弘扬优秀传统文化为己任，激荡了观众内心对民族历史、传统文化的热爱，更推动中国文化不断走出去。

高三英语二轮复习高考题型之四完形填空专题七完形填空之记叙文

位敦市安定阳光实验学校专题七完形填空之记叙文[限时15分钟]A(2016·课标丙卷)When I was 13 my only purpose was to become the star on our football team.That meant__1__Miller King, who was the best__2__at our school.Football season started in September and all summer long I worked out.I carried my football everywhere for 3 .Just before September, Miller was struck by a car and lost his right arm.I went to see him after he came back from__4__.He looked very__5__，but he didn’t cry.That season, I__6__all of Miller’s records while he__7__the home games from the bench.We went 101 and I was named most valuable player，__8__I often had crazy dreams in which I was to blame for Miller’s__9__.One afternoon, I was crossing the field to go home and sawMiller__10__going over a fence－which wa sn’t__11__to climb if you had both arms.I’m sure I was the last person in the world he wanted to accept__12__from.But even that challenge he accepted.I__13__him move slowly over the fence.When we were finally__14__on the other side, he said to me, “You know, I didn’t tell you this during the season, but you did__15__.Thank you for filling in for__16__.”His words freed me from my bad__17__.I thought to myself, how even without an arm he was more of a leader.Damaged but not defeated, he was__18__ahead of me.I was right to have__19__him.From that day on, I grew__20__and a little more real.[语篇解读] 这是一篇记叙文。

2009年高考英语二轮复习专项限时训练-阅读理解

2009年高考英语二轮复习专项限时训练·阅读理解A“Creativity is the key to a brighter future,” says education and business experts. Here is how schools and parents can encourage this important skill in children.If Dick Drew had listened to his boss in 1925, we might not have a product that we now think of as of great importance: a new type of tape. Drew worked for the Minnesota Mining Company. At work he developed a kind of material strong enough to hold things together. But his boss told him not to think more about the idea. Finally, using his own time, Drew improved the tape, which now is used everywhere by many people. And his former company learned from its mistake. Now it encourages people to spend 15 percent of their work time just thinking about and developing new ideas.Creativity is not something one is just born with, nor is it necessarily a character of high intelligence. The fact that a person is highly intelligent does not mean that he uses it creatively. Creativity is the matter of using the resources one has to produce new ideas that are good for something.Unfortunately, schools have not tried to encourage creativity. With strong attention to test results and the development of reading, writing and mathematical skills, many educators give up creativity for corr ect answers. The result is that children can give back information but can’t recognize ways to use it in new situations. They may know the rules correctly but they are unable to use them to work out practical problems.It is important to give children choices. From the earliest age, children should be allowed to make decisions and understand their results. Even if it’s choosing between two food items for lunch, decision-making helps thinking skills. As children grow older, parents should let their children decide how to use their time or spend their money. This is because the most important character of creative people is a very strong desire to find a way out of trouble.1. What did the company where Drew once worked learn from its mistake?A. They should encourage people to work a longer time.B. People should be discouraged to think freely.C. People will do better if they spend most of their work time developing new ideas.D. It is necessary for people to spend some of their work time considering and improving new ideas.2. According to the passage, creativity is ________.A. something that most people are born withB. something that depends mainly on intelligenceC. a way of using what one has learned to work out new problemsD. something that is not important to the character of a person at all3. Why do schools tend to fail to encourage creativity?A. They give children too many choices.B. They are not strict enough with children.C. They care too much about examination marks.D. They do n’t understand the importance of education.4. Which of the following skills is the most important in developing creativity?A. Reading.B. Writing.C. Mathematical skill.D. Decision-making.BA new study finds that the animal known as man’s best friend can also be a good friend to the heart. Researchers in California say they have found that even just a short visit with a dog helped ease the worries of heart patients.The study divided the patients into three groups. In Group A, a dog and a person visited each patient for twelve minutes. Patients in Group B received just a human visitor for twelve minutes. And members of Group C received no visitor, human or canine(犬的).The dogs would lie on the hospital bed so the heart patients could touch them. The researchers say some patients immediately smiled and talked to the dog and the human visitor. Dogs, in her words, “make people happier, calmer and feel more loved.”The researchers examined the patients before, during and after the visits. They measured stress levels based on blood flow and heart activity. They say they found a twenty-four percent decrease in the group visited by both a dog and a person. They reported a ten percent decrease in the group visited by a person only. There was no change in the patients without any visit. These patients, however, did have an increase in their production of the hormone epinephrine(epinephrine肾上腺素). The body produces epinephrine during times of stress.The increase was an average of seven percent. But the study found that patients who spent time with a dog had a seventeen percent drop in their levels of epinephrine. Patients visited by a human but not a dog also had a decrease, but only two percent.1. The author believes that _______.A. the dog can take the place of most medicinesB. the dog is the most popular pet for manC. the findings of the research cannot be trustedD. visits by a human work better than visits by a dog2. Which of the following best shows the stress level changes in the groups of patients? BACC3. From the research findings we may conclude that _______.A. the less the body produces epinephrine, the betterB. the longer a visit lasts, the happier the patient should beC. the patients enjoyed the dogs’ company more than the human visitors’D. it’s impossible for heart patients to recover without dogs’ visits4. Which of the following is the best title for the passage?A. Worried Heart PatientsB. Epinephrine and StressC. Good Friend to the HeartD. Three Groups of PatientsCAn Earthship is a home that is built of materials such as old tires and aluminum cans. It is the idea of a man named Michael Reynolds. Many Earthships are more or less self-sufficient because they provide their own heat, air and water. They often have gardens watered and fed by waste water. They are comfortable and ecologically friendly.The main material used in building Earthships is tires. Tires are plentiful andcan't be recycled like paper, plastic, and metal. While building supplies for most houses can be very expensive, old used tires are free.First, the tires are packed tightly with dirt. Each full tire weighs as much as400 pounds. The tires are then stacked like bricks. The walls are extremely strong. They also help keep an even temperature in the house (between 60 and 70 degrees) without heating and cooling systems.The walls inside the Earthship are made of aluminum cans that are held together by cement. Then they are coated with adobe or stucco.The roofs of Earthships are sloped so that rain and snow run into large tanks. These tanks hold all the water for the house, and pumps push the water through the pipes. Sometimes, water flows in certain areas of the house as waterfalls! Water that has been used is pumped out into the gardens where owners grow much of their own food.In most of these houses, the southern side has huge windows that take in winter sunlight as a source of heat. Summer sun does not come in through the south windows, so it doesn't get too hot in the summer. The house also has solar panels that gather energy for lights and hot water and cooking. The Earthships have all the comforts of a regular house without the high cost of electric bills!In a time when we are running out of energy resources, pollution is bad, and waste is piling up, Earthships are the best places to live in. For people who truly care about the environment,Earthships provide a great alternative to traditional houses. You won't be giving up any comforts, and the styles are attractive. We all hope that more and more people will build Earthships and take a huge step toward helping the environment and saving our planet.1.What is the main idea of this passage?A. Earthships are a good way to live and protect the environment.B. Tanks hold water collected from rain and snow.C. It's important to grow your own food in a vegetable garden.D. People who live in Earthships usually live in the desert.2.Which of the following is NOT explained in the passage?A. How an Earthship is built.B. What an Earthship is mainly made of.C. Why the Earthship is so called.D. How an Earthship is heated in winter.3.Which evidence best supports the idea that Earthships are environmentally friendly?A. They were invented by Michael Reynolds.B. Water that has been used is pumped out into the garden.C. They are comfortable and ecologically friendly.D. The tires are packed tightly with dirt.4. It can be inferred from the passage that ________.A. a large population are already living in EarthshipsB. the idea of Earthships will attract the attention of governmentsC. the materials for the Earthships will be harmful to the dwellers(居住者)D.the northern side of the Earthship has no window答案与解析(A)1. 答案：D解析：答案依据在文章第二段。

高考英语第二轮知识点复习限时训练题21

专题限时训练(三十)[社会生活型阅读理解(二)](限时：25分钟)(一)Someday a stranger will read your e-mail without your permission or scan the websites you’ve visited.Or perhaps someone will casually glance through your credit card purchases or cell phone bills to find out your shopping preferences or calling habits.In fact，it’s likely some of these things have already happened to you.Who would watch you without your permission? It might be a girlfriend，a marketing company, a boss，a policeman or a criminal.Whoever it is，they will see you in a way you never intended to be seen—the 21st century equal to being caught naked(裸露的)．Psychologists tell us boundaries are healthy, though it’s important to reveal(透露)yourself to friends，family and lovers in stages，at appropriate times.Actually few boundaries remain.The digital breadcrumbs(面包屑)you leave everywhere make it easy for strangers to reconstruct who you are，where you are and what you like.In some cases，a simple Google search can reveal what you think.Like it or not，increasinglywe_live_in_a_world_where_you_simply_cannot_keep_a_secret. The key question is：Does that matter? For many Americans, the answer apparently is “no”．When opinion polls ask Americans about privacy, most say they are concerned about losing it.A survey found a majority of people are pessimistic about privacy, with 60 percent of respondents saying they feel their privacy is slipping away, and that bothers them.()2.What would psychologists advise on the relationships between friends?A．There should be a distance even between friends.B．There should be fewer quarrels between friends.C．Friends should always be faithful to each other.D．Friends should open their hearts to each other.()3.Why does the author say“we live in a world where you simply cannot keep a secret”？A．There are always people who are curious about others’ affairs.B．Many search engines profit by revealing people’s identities.C．People leave traces around when using modern technology.D．Modern society has finally developed into an open society.()4.What do most Americans do with regard to privacy protection?A．They change behaviors that might disclose their identity.B．They talk a lot but hardly do anything about it.C．They rely more and more on electronic equipment.D．They use various loyalty cards for business deals.()5.According to the passage，privacy is like health in that ________.A．its importance is rarely understoodB．it is something that can easily be lostC．people will make every effort to keep itD．people don’t treasure it until they lose it(二)Since we are social beings, the quality of our lives depends in large measure on our interpersonal relationships.One strength of the human condition is our tendency to give and receive support from one another under stressful circumstances.Social support consists of the exchange of resources among people based on their interpersonal ties.Those of us with strong support systems appear better able to cope with major life changes and daily hassles(困难)．People with strong social ties live longer and have better health than those without such ties.Studies over a range of illnesses, from depression to heart disease, reveal that the presence of social support helps people fend off(挡开) illness, and the absence of such support makes poor health more likely.Social support cushions stress in a number of ways.First, friends, relatives, and co-workers may let us know that they value us.Our self-respect is strengthened when we feel accepted by other despite our faults and difficulties.Second, other people often provide us with informational support.They help us to define and understand our problems and find solutions to them. Third, we typically find social companionship supportive.Engaging in leisure-time activities with others helps us to meet our social needs while at the same time distracting(转移……注意力) us from our worries and troubles.Finally, other people may give us instructive support—financial aid, material resources, and needed services—that reduces stress by helping us resolve and cope with our problems.()1.Interpersonal relationships are important because ________.A．they are indispensable(不可缺少的) to people’s social well-being B．they awaken people’s desire to exchange resourcesC．they help people to cope with life in the information ageD．they can cure a range of illnesses such as heart disease, etc.()2.Research shows that people’s physical and mental health________.A．relies on the social welfare system which support themB．has much to so with the amount of support they get from others C．depends on their ability to deal with daily worries and troubles D．is closely related to their strength for coping with major changes in their lives()3.Which of the following is closest in meaning to the word “cushions”(Line 1，para.2) ?A．Adds up to.B．Does away with.C．Lessens the effect of.D．Lays the foundation of.()4.Helping a sick neighbor with some repair work is an example of________.A．informational supportB．instructive supportC．social companionshipD．the strengthening of self-respect()5.Social companionship is beneficial in that ________.A．it helps strengthen our ties with relativesB．it enables us to eliminate our faults and mistakesC．it makes our leisure-time activities more enjoyableD．it draws our attention away from our worries and troubles(三)Some years ago industries had more freedom than they have now，and they did not need to be as careful as they must today.They did not need to worry a lot about the safety of the new products that they developed.They did not have to pay much attention to the health and safety of the people who worked for them.Often new products were dangerous for the people who used them；often conditions in the work place had very bad effects on the health of the workers.Of course sometimes there were real disasters(灾难) which attracted the attention of governments and which showed the need for changes.Also scientists who were doing research into the health of workers sometimes produced information which governments could not ignore.At such times, there were inquiries into the causes of the disasters or the problems.New safety rules were often introduced as a result of these inquiries；however, the new rules came too late to protect the people who died or who became seriously ill.Today many governments have special departments which protect customers and workers.In the U．S., for example, there is a department which tests new airplanes and gives warnings about possible problems.It also makes the rules that aircraft producers must follow.Another department controls the foods and drugs that companies sell.A third department looks at the places where people work，and then reports any companies that are breaking the laws which protect the health and safetyof workers.Of course，new government departments and new laws cannot prevent every accident or illness，but they are having some good results.Our work places are safer and cleaner than before.The planes and cars which we use for travel are better.Producers are thinking more about the safety and health of the people who buy and use their products.()1.The main topic of the passage is________.A．conditions in the work placeB．the freedom of industries in the pastC．changes in industrial productionD．the safety and health of workers and customers()2.It can be inferred from the passage that in the past________.A．workers often got ill because of the poor working conditionsB．companies were free to put out any products they wanted toC．many people were killed by dangerous productsD．industries were as careful in management as they are today()3.It is implied in the passage that________.A．governments and companies had different opinions about the safety of productsB．governments paid little attention to the safety of productsC．government officials often did not listen to scientistsD．in the past no safety laws were introduced by governments()4.Some years ago safety rules________.A．were put forward due to scientists’ recommendationsB．came into being as a result of the work ers’ demandsC．were introduced because quite a number of people were killed or seriously injuredD．were effective enough to protect workers and customers()5.The special departments protect customers and workers in many ways EXCEPT by________.A．testing new productsB．controlling the sale of productsC．designing new productsD．inspecting work places专题限时训练(三十)(一)1.D推理判断题。

2018年高考英语江苏专版二轮专题复习三维训练：专题限时检测十五-二十三含答案精品

专题限时检测(十五) 阅读理解细节理解类之正误判断题(加★的为正误判断题，本卷限时23分钟)A(2017·南京市、盐城市高三一模)Chicago_Doctor_InventsAffordable Hearing AidSuperb Performance From Affordable Digital Hearing Aids Boardcertified Ear, Nose, and Throat physician Dr. Cherukuri has done it once again with his newest invention of a medicalgrade, ALLDIGITAL, affordable hearing aid.Dr.Cherukuri knew that untreated hearing loss could lead to depression, social isolation, anxiety, and symptoms consistent with Dementia and Alzheimer's disease. In his practice he knew that many of his patients would benefit from new digital hearing aids but many couldn't afford the expense, which is not generally covered by Medicare and most private health insurance policies.Same Technology as $3,500 Hearing AidsHe evaluated all the highpriced digital hearing aids on the market and then created his own affordable version — called MDHearingAid AIR for its virtually invisible, lightweight appearance. This doctordesigned digital hearing aid delivers clear sound all day long and the soft flexible ear domes are so comfortable that you won't realize you are wearing them.This new digital hearing aid is packed with the features of $3,500 competitors at a small part of the cost. Now most people with hearing loss are able to enjoy crystal clear, natural sound — in a crowd, on the phone, in the wind —without “whistling” and annoying background noise.Try It at Home with a 45Day RiskFree TrialOf course hearing is believing, and we invite you to try it for yourself with our RISKFREE 45Day home trial. If you are not completely satisfied simply return it within that time period for a full refund of your purchase price.·Mini Behindtheear Digital Hearing Aid·AudiologistTested·FDARegistered·FREE Shippin g in the USA·Batteries Included！ Comes Ready To Use·DoctorRecommended·Nearly Invisible·Thousands of Satisfied Customers·100% MoneyBack GuaranteeFor the Lowest Price Call Today 8003156343Phone Lines Open 24 Hours EVERY DAYUse Offer Code CT13 to get FREE Batteries for a Full Year!语篇解读：本文是应用文，介绍了一款大众能买得起的助听器的相关内容。

高考二轮复习限时训练(六)

高考二轮复习限时训练（六）（时间：60分钟）班级姓名得分一、填空题（5分×12=60分）1．已知集合A=}41|{<<-x x ，B=}62|{<<x x ，则A ∩B= 。

2．函数）2x (log y a +=(a ＞0,a ≠1)的图象恒过定点P ，则P 点坐标为。

3．已知向量)4,3(-=a ，向量b 满足b ∥a ，且1||=b ，则b = 。

4．从[0，1]之间选出两个数，这两个数的平方和大于1的概率是。

5．在等比数列｛n a ｝中,若7944,1a a a ⋅==,则12a 的值是。

6．一几何体的三视图如下，它的体积为。

7．当3=x 时，下面算法输出的结果是。

8．在△OAB 中,(2cos ,2sin )O A αα= , (5cos ,5sin )O B ββ=,若5OA OB ⋅=- ,则O AB S ∆= .9．若关于x 的方程()233740tx t x +-+=的两个实根,αβ满足012αβ<<<<，实数t的取值范围是。

10．圆心在（2，－3）点，且被直线0832=-+y x 截得的弦长为34的圆的标准方程为11．在一次教师联欢会上，到会的女教师比男教师多12人，从这些教师中随机挑选一人表演节目若选到男教师的概率为209，则参加联欢会的教师共有人12．当(12)x ∈，时，不等式240x m x ++<恒成立，则m 的取值范围是．二、解答题（15分×2 =30分）13．在锐角三角形ABC 中，已知内角A 、B 、C 所对的边分别为a 、b 、c ，且t a n t a n (1t a n t a n )3A B A B -=+⋅． Read xIf x <10 Then y ←2x Elsey ←x 2 Print y第7题图（1）若ab b a c -+=222，求A 、B 、C 的大小；（2）已知向量(sin ,cos ),(cos ,sin ),|32|A A B B ==-求m n m n 的取值范围．14．如图，矩形A B C D 的两条对角线相交于点(20)M ，，A B 边所在直线的方程为360x y --=, 点(11)T -，在A D 边所在直线上．（I ）求A D 边所在直线的方程；（II ）求矩形ABCD 外接圆的方程；（III ）若动圆P 过点(20)N -，，且与矩形ABCD 的外接圆外切，求动圆P 的圆心的方程．南师大附校09高考二轮复习限时训练（六）参考答案一、填空题（5分×12=60分）1．}42|{<<x x 2．(－1，０) 3．（54,53-）或（54,53-） 4．41π- 5.4 6. 327．6 8.29．22,262 10．222(2)(3)5x y -++=11.120 12．（54,53-）或（54,53-）二、解答题13．解：由已知.22.20,2033)tan(,33tan tan 1tan tan ππππ<-<-∴<<<<=-∴=⋅+-B A B A B A BA BA 得.6π=-∴B A（I ）由已知.4,1253,6,.3,212cos 222ππππππ==⎪⎪⎪⎩⎪⎪⎪⎨⎧==-=++=∴=-+=B AC B A C B A C abcb a C 解得由得.3,4,125πππ===∴C B A （II ）|3m －2n |2=9 m 2+4n 2－12 m ·n =13－12（sin A cos B +cos A sin B ）=13－12sin(A +B )=13－12sin （2 B +6π）.∵△ABC 为锐角三角形，A －B =6π，∴C =π－A －B <2π，A =6π+B <2π..65622,36πππππ<+<<<∴B B ).1,21()62sin(∈+∴πB14．解:（I ）因为A B 边所在直线的方程为360x y --=，且A D 与A B 垂直，所以直线A D 的斜率为3-．又因为点(11)T -，在直线A D 上，所以A D 边所在直线的方程为13(1)y x -=-+．320x y ++=．（II ）由36032=0x y x y --=⎧⎨++⎩，解得点A 的坐标为(02)-，，因为矩形ABCD 两条对角线的交点为(20)M ，．所以M 为矩形ABCD 外接圆的圆心．又AM == 从而矩形ABCD 外接圆的方程为22(2)8x y -+=．（III ）因为动圆P 过点N ，所以P N 是该圆的半径，又因为动圆P 与圆M 外切，所以PM PN =+PM PN -=．故点P 的轨迹是以M N ，为焦点，实轴长为的双曲线的左支．因为实半轴长a =，半焦距2c =．所以虚半轴长b ==从而动圆P 的圆心的轨迹方程为221(22xyx -=≤．。

人教版新高考英语二轮复习习题训练--30分语言运用限时满分练(三)

30分语言运用限时满分练(三)(限时25分钟)Ⅰ.完形填空(共15小题; 每小题1分, 满分15分)(2021·山东济南高三高考适应性考试)Last month, Koch went to make breakfast and found a(n)1 guest using his pool. A large moose(驼鹿) was swimming in the deep end, 2 in the solar cover(太阳能覆盖膜).“I looked out in the backyard and there was the moose absolutely panicked and3,” Koch told The Dodo. “She stepped on the solar cover and put her 4 through it and she was 5 trying to get free.”Koch noticed some wildlife around his home in Ottawa,6 he had never seen an animal 7 impressive before. He rushed outside and pulled the solar cover off the 8 moose, who continued paddling 9 the pool, proving to be a surprisingly skilled swimmer.The wild moose seemed to be having trouble finding her way out of the pool, so Koch called the police and wildlife services to see if they could 10 a hand. “She looked so pitifully sad out there that my wife said, ‘I want to give her a 11.’”Workers from wildlife services intended that they would get her to a safer spot, but they couldn’t 12it until she was out of the water. “The best thing that happened was that after 3.5 hours she climbed out of the shallow end and 13 the fence,” Koch said.The moose 14 unscratched, but the same can’t be said for Koch’s pool, which now has two hoof-sized holes in the 15.rmal B.ordinaryualD.uninvited2.A.abandoned B.wrappedC.removedD.forbidden3.A.struggling B.shakingC.shoutingD.searching4.A.shoulder B.footC.faceD.back5.A.narrowly B.likelyC.desperatelyD.unwillingly6.A.for B.soC.butD.or7.A.this B.wellC.almostD.rather8.A.relaxed B.happyC.tiredD.poor9.A.around B.beneathC.outsideD.beyond10.A.donate B.hurtC.lendD.cure11.A.lift B.hugC.smileD.credit12.A.update B.witnessC.cancelD.manage13.A.watched out B.cut downC.jumped overD.dived into14.A.escaped B.participatedC.hesitatedD.insisted15.A.top B.bottomC.wallD.coverⅡ.语篇填空(共10小题; 每小题1.5分, 满分15分)(2021·宁夏银川高三教学质量检测)Connect Online to meet OfflineIn our information technology society, we often have 16.(much) communication online than offline. For example, just compare the number of people to 17. you have sent online messages with that of people you 18.(meet) in the past two weeks.However, there are now mobile apps which allow you 19.(connect) with strangers online and then meet in person, and I’m not talking about dating apps! Rather, I’m referring to apps which help to connect people with similar interests who live in the same city. To begin with, get online and find a group that 20.(interest) you. Then, simply join 21. group. As long as you’re in a group with like-minded people, you will be able to enjoy 22.(do) the same activities together. You can do this 23. free, although some apps will ask you to pay if you want to create an interest group.There is a wide 24.(vary) of interest groups out there, such as those for hiking, football, photography, board games, poetry, or dog owners. You name it, and they’ve got it! This is 25.(real) a great way to network and meet people if you’re new to a city, or simply to make new friends.30分语言运用限时满分练(三)【语篇导读】本文是一篇记叙文。

高考英语二轮复习方案专题限时训练(三)(新课标·广东专用) 议论文型完形填空 Word版含解析

专题限时训练(三)[议论文型完形填空](限时：每篇15分钟)AWhat separates people who reach their goals from everyone else is their ability to stay on track, despite challenges. __1__ will come; you can bet there will be chances for you to get off track. If you're an athlete, it may be an injury that causes you to have to __2__ practices. If you're trying to get to a healthy weight, you may have to travel __3__ and stay with a friend who doesn't like to work out. The point is that some kind of challenge will __4__.How we deal with these challenges __5__ the victims from the victors. You can use challenges as a stepping __6__ or as a block, and you can use them to __7__ your ambition or block your view; the __8__ is yours.Challenges should __9__ to make you stronger and more consistent as you attend to each difficulty. They should cause your __10__ to dig deeper, in search of a(n) __11__.The problem arises when you don't __12__ challenges. If you can predict potential problems and plan __13__，you will have confidence and your belief in yourself will build up.Your ability to stay __14__ and overcome difficulties is what will set you apart and allow you to achieve your goal.Start working towards your dreams daily. Get started by setting down what your next step is to accomplish your goal. Then get into __15__ as you move closer to your goal daily.1. A．Abilities B．GoalsC．Possibilities D．Challenges2. A．miss B．strengthenC．appreciate D．confuse3. A．disappointedly B．unexpectedlyC．deliberately D．daily4. A．raise B．ariseC．appoint D．turn5. A．separates B．protectsC．shelters D．deserts6. A．appointment B．arrangementC．stone D．expectation7. A．produce B．ignoreC．reduce D．strengthenC．preparation D．promise9. A．provide B．serveC．offer D．expect10. A．characteristics B．abilityC．roots D．signs11. A．solution B．comfortC．study D．adaptation12. A．blame B．acceptC．meet D．expect13. A．actually B．otherwiseC．beforehand D．after14. A．solved B．focusedC．deserted D．reduced15. A．effort B．measureC．plan D．actionBWe always want what we cannot have. When we're young, we want to stay out late, have romantic relationships, and be __1__. However, when we're __2__，we want to go back to being young and we __3__ the days when we didn't have to worry about complex love affairs, __4__ pressure, and money problems.Young people believe adulthood __5__ freedom from parents and schoolwork. When we get older，we feel that __6__ is freedom from work pressure and family responsibilities. To __7__ this feeling, people say, “The grass is always greener on the other side.”As teenagers, we like to be like adults but as young adults, we __8__ to be young again. We think about staying out late and having our own money to spend. Suddenly, we see that love can result in __9__ hearts; staying out late makes it hard to get ready for __10__ the next morning. We find out that adult life is not as __11__ as we thought it would be and suddenly, life becomes very scary.Life is fair. It gives us time to __12__ but also requires us to work. The time will come when we must grow up and we will always look back wishing we __13__ being young a bit longer. That time will not come back. It is normal to want what we cannot have but the __14__ is that to be happy is to appreciate what we have. That is the first step to growing up. __15__ life becomes more complex, we will not regret the time we wasted wishing we were adults.1. A．comfortable B．dependentC．independent D．polite2. A．older B．defeatedC．married D．confident3. A．like B．forgetC．regret D．miss4. A．study B．jobC．age D．healthC．means D．limits6. A．childhood B．adulthoodC．parenthood D．romanticism7. A．reduce B．describeC．experience D．understand8. A．wish B．decideC．return D．stop9. A．healthy B．ambitiousC．broken D．excited10. A．breakfast B．schoolC．exercise D．work11. A．rich B．busyC．free D．easy12. A．study B．thinkC．play D．live13. A．stopped B．enjoyedC．imagined D．tried14. A．reason B．resultC．dream D．truth15. A．If B．WhenC．Unless D．BeforeCThe concept of solitude (独处) in the digital world is almost nonexistent. In the world of digital technology, email, social network ing and online video games, information is meant to be __1__. Solitude can be hard to discover once it has been given up. In this respect, new technologies have __2__ our culture.The desire to be connected has brought solitude to a(n) __3__ as we've known it. People have become so __4__ in the world of networks and connections that one can often be contacted even if they'd rather not be. Today we can talk, text, email, chat and blog(写博客), not only from our __5__ but from our mobile phones as well.Most developed nations have become __6__ on digital technology simply because they've grown accustomed to it, and at this point not __7__ it would make them an outsider. Also, many jobs and careers require people to be __8__. From this point of view, technology has changed the culture of work. Being reachable might feel like a __9__ to those who may not want to be able to be contacted at all times.I suppose the positive side is that solitude is still possible for anyone who __10__wants it. Computers can be shut down and mobile phones can be turned off. The ability to be “connected” and “on” has many __11__，as well as disadvantages. Travellers have ended up __12__ on mountains, and mobile phones have saved countless lives. They can also make people feel __13__ and forced to answer unwanted calls or __14__ to unwanted texts.Attitudes towards our connectedness as a society __15__ across generations. Some find today's technology a gift. Others consider it a curse. Regardless of anyone's view on the subject, it's hard to imagine what life would be like without daily advancements in technology.1．A.updated B．receivedC．shared D．collected2．A.respected B．shapedC．ignored D．preserved3．A.edge B．stageC．end D．balance4．A.sensitive B．intelligentC．considerate D．reachable5．A.media B．computersC．databases D．monitors6．A.bent B．hardC．keen D．dependent7．A.finding B．usingC．protecting D．changing8．A.connected B．trainedC．recommended D．interested9．A.pleasure B．benefitC．burden D．disappointment10．A.slightly B．hardlyC．merely D．really11．A.aspects B．weaknessesC．advantages D．exceptions12．A.hidden B．lostC．relaxed D．deserted13．A.trapped B．excitedC．confused D．amused14．A.turn B．submit C．object D．reply15．A.vary B．arise C．spread D．exist专题限时训练(三)A【要点综述】生活中我们会遇到各种各样的挑战，它们可能成为你成功路上的铺路石，也可能成为你实现人生目标的绊脚石，关键在于你如何去选择。

2020新课标高考数学(理)二轮总复习(课件+专题限时训练)1-6-2

专题限时训练 (小题提速练)(建议用时：45分钟)一、选择题1．若∀x 1，x 2∈⎝ ⎛⎭⎪⎫0，π2，x 2>x 1，y 1＝sin x 1x 1，y 2＝sin x 2x 2，则( ) A ．y 1＝y 2 B ．y 1>y 2 C ．y 1<y 2D ．y 1，y 2的大小关系不能确定答案：B解析：设y ＝sin x x ，则y ′＝(sin x )′·x －sin x ·(x )′x 2＝x cos x －sin x x 2.因为在⎝ ⎛⎭⎪⎫0，π2上x <tan x ，所以x cos x －sin x <0，所以y ′<0，所以y ＝sin x x 在⎝ ⎛⎭⎪⎫0，π2上单调递减，所以y 1>y 2.2．若函数f (x )＝2x 2－ln x 在其定义域内的一个子区间(k －1，k ＋1)上不是单调函数，则实数k 的取值范围是( ) A ．[1，＋∞) B ．[1,2) C.⎣⎢⎡⎭⎪⎫1，32 D ．⎣⎢⎡⎭⎪⎫32，2答案：C解析：f ′(x )＝4x －1x ＝(2x －1)(2x ＋1)x .∵x ＞0，∴由f ′(x )＝0得x ＝12.令f ′(x )＞0，得x ＞12；令f ′(x )＜0，得0＜x ＜12.由题意得⎩⎨⎧k －1≥0，k －1＜12＜k ＋1⇒1≤k ＜32.3．函数f (x )＝x 3－3ax －a 在(0,1)内有最小值，则a 的取值范围是( )A ．[0,1)B ．(－1,1) C.⎝ ⎛⎭⎪⎫0，12 D ．(0,1)答案：D解析：f ′(x )＝3x 2－3a ＝3(x 2－a )．当a ≤0时，f ′(x )>0，∴f (x )在(0,1)内单调递增，无最小值．当a >0时，f ′(x )＝3(x －a )(x ＋a )．当x ∈(－∞，－a )和(a ，＋∞)时，f (x )单调递增，当x ∈(－a ，a )时，f (x )单调递减，所以当a <1，即0<a <1时，f (x )在(0,1)内有最小值．4．若存在正数x 使2x (x －a )<1成立，则a 的取值范围是( ) A ．(－∞，＋∞) B ．(－2，＋∞) C ．(0，＋∞) D ．(－1，＋∞)答案：D解析：∵2x (x －a )<1，∴a >x －12x . 令f (x )＝x －12x ，∴f ′(x )＝1＋2－x ln 2>0. ∴f (x )在(0，＋∞)上单调递增， ∴f (x )>f (0)＝0－1＝－1， ∴a 的取值范围为(－1，＋∞)．5．(2019·曲靖二模)已知偶函数f (x )的定义域是(－∞，0)∪(0，＋∞)，其导函数为f ′(x )，对定义域内的任意x ，都有2f (x )＋xf ′(x )＞0成立，若f (2)＝1，则不等式x 2f (x )＜4的解集为( ) A ．{x |x ≠0，±2} B ．(－2,0)∪(0,2)C ．(－∞，－2)∪(2，＋∞)D ．(－∞，－2)∪(0,2) 答案：B解析：令g (x )＝x 2f (x )－4，g (2)＝0. ∵g (－x )＝x 2f (－x )－4＝x 2f (x )－4＝g (x )，∴g (x )在定义域(－∞，0)∪(0，＋∞)上为偶函数．当x ＞0时，g ′(x )＝2xf (x )＋x 2f ′(x )＝x [2f (x )＋xf ′(x )]＞0成立． ∴函数g (x )在(0，＋∞)上为增函数． ∴不等式x 2f (x )＜4⇔g (|x |)＜g (2)． ∴|x |＜2，x ≠0.解得x ∈(－2,0)∪(0,2)．6．已知f (x )是定义在(0，＋∞)上的非负可导函数，且满足xf ′(x )＋f (x )≤0，对任意的0<a <b ，则必有( ) A ．af (b )≤bf (a ) B ．bf (a )≤af (b ) C ．af (a )≤f (b ) D ．bf (b )≤f (a )答案：A解析：因为xf ′(x )≤－f (x )，f (x )≥0，所以⎣⎢⎡⎦⎥⎤f (x )x ′＝xf ′(x )－f (x )x 2≤－2f (x )x 2≤0，则函数f (x )x 在(0，＋∞)上单调递减．由于0<a <b ，则f (a )a ≥f (b )b ，即af (b )≤bf (a )．7．(2019·甘肃模拟)若点(m ，n )在函数f (x )＝13x 3－x (x >0)的图象上，则n －m ＋22的最小值是( ) A.13 B ．23 C.223 D ．2 2答案：C解析：∵点(m，n)在函数f(x)＝13x3－x(x>0)的图象上，∴n＝13m3－m，则n－m＋22＝13m3－2m＋2 2.令g(m)＝13m3－2m＋22(m＞0)，则g′(m)＝m2－2，可得g(m)在(0，2)递减，在(2，＋∞)递增，∴g(m)的最小值是g(2)＝223.8．定义在R上的函数f(x)的导函数为f′(x)，已知f(x＋1)是偶函数，且(x－1)f′(x)<0.若x1<x2，且x1＋x2>2，则f(x1)与f(x2)的大小关系是()A．f(x1)<f(x2) B．f(x1)＝f(x2)C．f(x1)>f(x2) D．不确定答案：C解析：由(x－1)f′(x)<0可知，当x>1时，f′(x)<0，函数单调递减．当x<1时，f′(x)>0，函数单调递增．因为函数f(x＋1)是偶函数，所以f(x＋1)＝f(1－x)，f(x)＝f(2－x)，即函数f(x)图象的对称轴为x＝1.所以，若1≤x1<x2，则f(x1)>f(x2)；若x1<1，则x2>2－x1>1，此时有f(x2)<f(2－x1)，又f(2－x1)＝f(x1)，所以f(x1)>f(x2)．综上，必有f(x1)>f(x2)．9．已知函数f(x)＝ax－1＋ln x，若存在x0>0，使得f(x0)≤0有解，则实数a的取值范围是()A．a>2 B．a<3 C．a≤1 D．a≥3 答案：C解析：函数f(x)的定义域是(0，＋∞)，不等式ax－1＋ln x≤0有解，即a≤x－x ln x在(0，＋∞)上有解，令h(x)＝x－x ln x，可得h′(x)＝1－(ln x＋1)＝－ln x．令h′(x)＝0，可得x＝1，当0<x<1时，h′(x)>0，当x>1时，h′(x)<0，可得当x＝1时，函数h (x )＝x －x ln x 取得最大值1，要使不等式a ≤x －x ln x 在(0，＋∞)上有解，只要a 小于等于h (x )的最大值即可，即a ≤1.10．直线y ＝a 分别与直线y ＝2(x ＋1)，曲线y ＝x ＋ln x 交于点A ，B ，则|AB |的最小值为( ) A ．3 B ．2 C.324 D ．32答案：D解析：解方程2(x ＋1)＝a ，得x ＝a2－1.设方程x ＋ln x ＝a 的根为t (t ＞0)，则t ＋ln t ＝a ，则|AB |＝⎪⎪⎪⎪⎪⎪t －a 2＋1＝⎪⎪⎪⎪⎪⎪t －t ＋ln t 2＋1＝⎪⎪⎪⎪⎪⎪t 2－ln t 2＋1. 设g (t )＝t 2－ln t2＋1(t ＞0)，则g ′(t )＝12－12t ＝t －12t (t ＞0)．令g ′(t )＝0，得t ＝1.当t ∈(0,1)时，g ′(t )＜0；当t ∈(1，＋∞)时，g ′(t )＞0，所以g (t )min ＝g (1)＝32，所以|AB |≥32，所以|AB |的最小值为32.11．当x ∈[－2,1]时，不等式ax 3－x 2＋4x ＋3≥0恒成立，则实数a 的取值范围是( )A ．[－5，－3]B ．⎣⎢⎡⎦⎥⎤－6，－98C ．[－6，－2]D ．[－4，－3]答案：C解析：当x ∈(0,1]时，得a ≥－3⎝ ⎛⎭⎪⎫1x 3－4⎝ ⎛⎭⎪⎫1x 2＋1x ，令t ＝1x ，则t ∈[1，＋∞)，a ≥－3t 3－4t 2＋t ，令g (t )＝－3t 3－4t 2＋t ，t ∈[1，＋∞)，则g ′(t )＝－9t 2－8t ＋1＝－(t ＋1)·(9t －1)，显然在[1，＋∞)上，g ′(t )<0，g (t )单调递减，所以g (t )max ＝g (1)＝－6，因此a ≥－6.同理，当x ∈[－2,0)时，得a ≤－2.由以上两种情况得－6≤a ≤－2，显然当x ＝0时也成立，故实数a 的取值范围为[－6，－2]．12．设函数f (x )＝3sin πm x ，若存在f (x )的极值点x 0满足x 20＋f 2(x 0)＜m 2.则m 的取值范围是( )A ．(－∞，－6)∪(6，＋∞)B ．(－∞，－4)∪(4，＋∞)C ．(－∞，－2)∪(2，＋∞)D ．(－∞，－1)∪(1，＋∞) 答案：C解析：由正弦函数的图象知，f (x )的极值点x 0满足f (x 0)＝±3. ∴πx 0m ＝k π＋π2，k ∈Z .∴x 0＝⎝ ⎛⎭⎪⎫k ＋12·m .∴不等式x 20＋f 2(x 0)＜m 2⇔⎝ ⎛⎭⎪⎫k ＋122m 2＋3＜m 2(k ∈Z )⇔m 2·⎣⎢⎡⎦⎥⎤1－⎝ ⎛⎭⎪⎫k ＋122＞3(k ∈Z )．存在f (x )的极值点x 0满足x 20＋f 2(x 0)＜m 2⇔存在整数k 使不等式m 2·⎣⎢⎡⎦⎥⎤1－⎝ ⎛⎭⎪⎫k ＋122＞3成立．当k ≠0且k ≠－1时，必有⎝ ⎛⎭⎪⎫k ＋122＞1，此时不等式显然不成立．∴k ＝0或－1时，m 2·⎣⎢⎡⎦⎥⎤1－⎝ ⎛⎭⎪⎫k ＋122＞3⇔34m 2＞3⇔m ＞2或m ＜－2. 二、填空题13．已知函数f (x )＝x 2＋mx －1，若对于任意x ∈[m ，m ＋1]，都有f (x )<0成立，则实数m 的取值范围是__________．答案：⎝ ⎛⎭⎪⎫－22，0解析：作出二次函数f (x )的图象，对于任意x ∈[m ，m ＋1]，都有f (x )<0，则有⎩⎪⎨⎪⎧f (m )<0，f (m ＋1)<0，即⎩⎪⎨⎪⎧m 2＋m 2－1<0，(m ＋1)2＋m (m ＋1)－1<0.解得－22<m <0.14．(2019春·潍坊期中)已知函数f (x )的定义域为R ，f (－2)＝－2，若对∀x ∈R ，f ′(x )＜3，则不等式f (x )＞3x ＋4的解集为________．答案：(－∞，－2)解析：根据题意，设g (x )＝f (x )－3x －4，则g ′(x )＝f ′(x )－3.由对∀x ∈R ，f ′(x )＜3，则g ′(x )＜0，即g (x )在R 上为减函数．又由f (－2)＝－2，则g (－2)＝f (－2)＋6－4＝0，则f (x )＞3x ＋4⇒f (x )－3x －4＞0⇒g (x )＞g (－2)，即不等式的解集为(－∞，－2)．15．(2019·南开区二模)已知函数f (x )＝e x －1e x －2sin x ，其中e 为自然对数的底数，若f (2a 2)＋f (a －3)＜0，则实数a 的取值范围为________．答案：⎝ ⎛⎭⎪⎫－32，1解析：∵f (x )＝e x －1e x －2sin x ，∴f (－x )＝e －x －e x ＋2sin x ＝－f (x )， ∵f (x )′＝e x ＋1e x －2cos x ≥2e x ·e －x －2cos x ≥0，∴f (x )在R 上单调递增且为奇函数．由f (2a 2)＋f (a －3)＜0，可得f (2a 2)＜－f (a －3)＝f (3－a )， ∴2a 2＜－a ＋3，解得－32<a <1. 16．已知函数f (x )＝x －1x ＋1，g (x )＝x 2－2ax ＋4，若对于任意x 1∈[0,1]，存在x 2∈[1,2]，使f (x 1)≥g (x 2)，则实数a 的取值范围是__________．答案：⎣⎢⎡⎭⎪⎫94，＋∞解析：由于f ′(x )＝1＋1(x ＋1)2>0，因此函数f (x )在[0,1]上单调递增，所以x ∈[0,1]时，f (x )min ＝f (0)＝－1.根据题意可知存在x ∈[1,2]，使得g (x )＝x 2－2ax ＋4≤－1，即x 2－2ax ＋5≤0，即a ≥x 2＋52x 能成立．令h (x )＝x 2＋52x ，则要使a ≥h (x )在x ∈[1,2]能成立，只需使a ≥h (x )min .又函数h (x )＝x 2＋52x 在x ∈[1,2]上单调递减，所以h (x )min ＝h (2)＝94，故只需a ≥94.专题限时训练 (大题规范练)(建议用时：30分钟)1．(2019·河南模拟)已知函数f (x )＝x ln x ＋e. (1)若f (x )≥ax 恒成立，求实数a 的最大值； (2)设函数F (x )＝e x －1f (x )－x 2－2x ＋1，求证：F (x )＞0. 解析：(1)函数f (x )＝x ln x ＋e 的定义域为(0，＋∞)， f (x )≥ax 恒成立⇔a ≤x ln x ＋e x .令φ(x)＝x ln x＋ex，则φ′(x)＝x－ex2，可得φ(x)在(0，e)上单调递减，在(e，＋∞)上单调递增，∴φ(x)min＝φ(e)＝2，∴a≤2.故实数a的最大值为2.(2)由(1)可知f(x)≥2x，只需证明2x≥x2＋2x－1e x－1.令g(x)＝2x－x2＋2x－1e x－1，则g′(x)＝2－3－x2e x－1＝2e x－1＋x2－3e x－1.令h(x)＝2e x－1＋x2－3，h′(x)＝2e x－1＋2x＞0在(0，＋∞)恒成立．注意到h(1)＝0，所以当x∈(0,1)时，h(x)＜0，g′(x)＜0，x∈(1，＋∞)时，h(x)＞0，g′(x)＞0，∴g(x)在(0,1)单调递减，在(1，＋∞)单调递增，∴g(x)min＝g(1)＝0.∴2x≥x2＋2x－1e x－1.当且仅当x＝1时取等号，而f(x)≥2x，当且仅当x＝e时取等号，∴F(x)＞0.2．(2019·蓉城名校联盟联考)已知函数f(x)＝ax2－2(a＋1)x＋2ln x，a∈R.(1)讨论函数f(x)的单调性；(2)是否存在最大整数k，当a≤k时，对任意的x≥2，都有f(x)<e x(x－1)－ax－ln x成立？(其中e为自然对数的底数，e＝2.718 28…)，若存在，求出k的值；若不存在，请说明理由．解析：(1)f (x )的定义域为(0，＋∞)， f ′(x )＝2ax －2(a ＋1)＋2x ＝2(ax －1)(x －1)x，所以当a ∈(－∞，0]时，f (x )在(0,1)上单调递增，在(1，＋∞)上单调递减；当a ∈(0,1)时，f (x )在(0,1)和⎝ ⎛⎭⎪⎫1a ，＋∞上单调递增，在⎝ ⎛⎭⎪⎫1，1a 上单调递减；当a ＝1时，f (x )在(0，＋∞)上单调递增；当a ∈(1，＋∞)时，f (x )在⎝ ⎛⎭⎪⎫0，1a 和(1，＋∞)上单凋递增，在⎝ ⎛⎭⎪⎫1a ，1上单调递减．(2)ax 2－2(a ＋1)x ＋2ln x <e x (x －1)－ax －ln x 对x ≥2恒成立⇔ax 2－(a ＋2)x ＋3ln x <e x (x －1)． ①当x ＝2时，得4a －(a ＋2)×2＋3ln 2<e 2，所以2a <e 2＋4－ln 8<8＋4－2＝10，所以a <5，则整数k 的最大值不超过4.下面证明：当a ≤4时，不等式①对于x ≥2恒成立，设g (x )＝ax 2－(a ＋2)x ＋3ln x －e x (x －1)(x ≥2)，则g ′(x )＝2ax －(a ＋2)＋3x －x e x . 令h (x )＝2ax －(a ＋2)＋3x －x e x .则h ′(x )＝2a －3x 2－(x ＋1)e x <2a －(x ＋1)e x ≤2a －3e 2≤8－3e 2<0，所以h (x )在[2，＋∞)上单调递减，所以h (x )＝2ax －(a ＋2)＋3x －x e x ≤h (2)＝3a －12－2e 2≤232－2e 2<0. 即当x ∈[2，＋∞)时，g ′(x )<0，所以g (x )在[2，＋∞)上单调递减，所以g(x)＝ax2－(a＋2)x＋3ln x－e x(x－1)≤g(2)＝2a－4＋3ln 2－e2<8－4＋3－e2＝7－e2<0.所以a≤4时，不等式①恒成立，所以k的最大值为4.。

高考二轮复习限时训练(二)

高考二轮复习限时训练（二）（时间：60分钟）班级姓名得分一．填空题（每题5分，共60分）1. 已知复数121,2z i z i =-=+，那么12z z ⋅的值是．2. 集合{}22,A x x x R =-≤∈ {}2|,12B y y x x ==--≤≤，则()R C A B= .3. 函数x y 2sin =向量a 平移后，所得函数的解析式是12cos +=x y ，则模最小的一个向量a = .4. 甲、乙两名射击运动员参加某大型运动会的预选赛，他们分别射击了5次，成绩如下表（单位：环）如果甲、乙两人中只有1人入选，则入选的最佳人选应是 .5. 曲线在53123+-=x x y 在1=x 处的切线的方程为 .6. 已知实数x ，y 满足22,052yx y x +=++那么的最小值为 .7. 如图,是棱长为2的正四面体的左视图,则其主视图的面积为 . 8. 设数列{}n a 的首项127,5a a =-=，且满足22()n n a a n N ++=+∈，则135a a a a++++ = . 9.已知tan()35πα-=-则22sin cos 3cos 2sin αααα=- .10.阅读下列程序: Read S ←1For I from 1 to 5 step 2 S ←S+I Print S End for End输出的结果是 .11. 设函数()()f x g x 、在R 上可导，且导函数''()()f x g x >，则当a x b <<时，下列不等式:(1)()()f x g x >(2)()()f x g x <(3)()()()()f x g b g x f b +<+(4) ()()()()f x g a g x f a +>+ 正确的有 .12. 已知抛物线的顶点在原点,焦点在x 轴的正半轴上,F 为焦点,,,A B C 为抛物线上的三点,且满足0FA FB FC ++= ,FA + FB + 6FC =,则抛物线的方程为 .二．解答题（每题15分，共30分）13.直三棱柱111C B A ABC -中，11===BB BC AC ，31=AB ．（1）求证：平面⊥C AB 1平面CB B 1；（2）求三棱锥C AB A 11-的体积．14.已知二次函数),,(,)(2R c b a c bx ax x f ∈++=满足：对任意实数x ，都有x x f ≥)(，且当∈x （1，3）时，有2)2(81)(+≤x x f 成立。

高考二轮复习限时训练(七)

高考二轮复习限时训练（七）（时间：60分钟）班级姓名得分一、填空题：本大题共12小题，每小题5分，共60分．1、已知集合A =},1|{2Z x x y x ∈-=,},12|{A x x y y B ∈-==,则B A = .2、若曲线4()f x x x =-在点P 处的切线平行于直线3x －y ＝0，则点P 的坐标为．3、在等比数列{}n a 中，32,317483－=-=+a a a a ，公比q 是整数，则10a = ．4、已知a 与b 均为单位向量，它们的夹角为60º，那么| a +3b |等于 .5、已知函数)()(),0()(2x m f x m f a c bx ax x f -=+≠++=且，则m 等于6、如图是利用斜二测画法画出的ABO ∆的直观图,已知''B O =4,且ABO ∆的面积为16,过'A 作'''x C A ⊥轴,则''C A 的长为 .7、幂函数y =x α，当α取不同的正数时，在区间[0，1]上它们的图像是一族美丽的曲线（如图）．设点A （1，0），B （0，1），连接AB ，线段AB 恰好被其中的两个幂函数y =x α，y =x β的图像三等分，即有BM =MN =NA ．那么，αβ= ▲ ．8、设2≥x ，则函数1)2)(5(+++=x x x y 的最小值是． 9、已知实数x ，y 满足22,052y x y x +=++那么的最小值为 .10、已知)1(3cos 3)1(3sin )(+-+=x x x f ππ，则(1)(2)(2008)+++= f f f 11、已知二次函数f （x ）满足f x f x ()()11+=-，且f f ()()0011==，，若f x ()在区间［m ，n ］上的值域是［m ，n ］，则m ＝，n ＝。

12、若()sin() 1 (0,||<π)f x A x ωϕωϕ=++>对任意实数t ，都有()()ππ33f t f t +=-+．记 ()cos()1g x A x ωϕ=+-，则π()3g = ．二、解答题：本大题共2小题，共30分，13、在ABC △中，已知内角A π=3，边BC =B x =，周长为y ．（1）求函数()y f x =的解析式和定义域；（2）求y 的最大值．14、一个多面体的直观图和三视图如图所示，其中M 、N 分别是AB 、AC 的中点，G 是DF 上的一动点.（1）求证：;AC GN ⊥（7分）（2）当FG=GD 时，在棱AD 上确定一点P ，使得GP//平面FMC,并给出证明.（8分）a a a俯视图左视图主视图G E F N MD C B A高考二轮复习限时训练（七）一、填空题1．}1,1{- 2．（1，0） 3．-128 4．13 5．ab 2- 6. 22 7． 1 8． 328 910．23 11． m 0 ，n ＝ 1 12．－1 二、解答题：本大题共2小题，共30分，13、解：（1）ABC △的内角和A B C ++=π，由00A B C π=>>3，，得20B π<<3．应用正弦定理，知sin 4sin sin sin BC AC B x x A ===3，2sin 4sin sin BC AB C x A π⎛⎫==- ⎪3⎝⎭．因为y AB BC AC =++，所以224sin 4sin 03y x x x ππ⎛⎫⎫=+-+<< ⎪⎪3⎝⎭⎭（2）因为14sin sin 2y x x x ⎛⎫=+++ ⎪ ⎪⎝⎭5s i n 3x x ππππ⎛⎫⎫=++<+< ⎪⎪6666⎝⎭⎭，所以，当x ππ+=62，即x π=3时，y取得最大值．14、证明：由三视图可得直观图为直三棱柱且底面ADF 中A D ⊥DF,DF=AD=DC(1)连接DB ，可知B 、N 、D 共线，且AC ⊥DN又FD ⊥AD FD ⊥CD ，∴FD ⊥面ABCD∴FD ⊥AC∴AC ⊥面FDN FDN GN 面⊂∴GN ⊥AC（2）点P 在A 点处证明：取DC 中点S ，连接AS 、GS 、GAG 是DF 的中点，∴GS//FC,AS//CM∴面GSA//面FMCGSA GA 面⊂∴GA//面FMC 即GP//面FMC。