小题狂练4
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专题15 名词性从句50题---2022年高考英语第一轮复习小题狂练(原卷版)【名词性从句思维导图】【名词性从句高考考查动向】动向一、连接词that和what用法区别动向二、连接词whatever和whichever区别动向三、连接词if和whether用法区别【小题狂练一】在空白处填1个适当的单词或括号内单词的正确形式。
1. (2021·新高考全国) ________ is so breathtaking about the experience is the out-of-this-world scenes. The rolling sea of clouds you see once you are at the top will remind you how tiny we humans are.2. (2021·天津改编)What puzzles Lily's friends is ________ she always has so many crazy ideas.3. (2020·江苏改编)This actor often has the first two tricks planned before performing, and then goes for ___________.4. (2020·江苏改编)It is not a problem __________ we can win the battle; it’s just a matter of time.5. (2020·天津改编)The student completed this experiment to make come true __________Professor Joseph had said.6. (2020·北京)Oliver says if you're lucky enough to have someone close to you who enjoys cooking, ask them ___________you can join in when it's possible.7. (2020·浙江)Over thousands of years, they began to depend less on ___________ could be hunted or gathered from the wild, and more on animals they had raised and crops they had sown.8. (2019·全国I) While they are rare north of 88°,there is evidence ________ they range all the way across the Arctic, and as far south as James Bay in Canada.9. (2019·江苏改编) Scientists have obtained more evidence ___________ plastic is finding its way into the human body.10. Reading is to people sunshine is to flowers.11. It is by no means clear ___________the president can do to end the strike.12. The notice came around two in the afternoon ___________the meeting would be put off.13. He didn’t regret giving the suggestions but felt___________he could have expressed it differently.14. As many as five courses are provided, and you are free to choose ___________suits you best.15. Before a problem can be solved, it must be obvious ___________the problem itself is.16. The shocking news made me realize ___________ terrible problems we would face.17. It is not always easy for the public to see ___________use a new invention can be of to human life.18. When the news came ___________the war broke out, he decide to serve in the army.19. We haven’t discussed yet ___________we are going to place our new furniture.20. As a new graduate, he doesn’t kn ow ___________it takes to start a business here.21. To improve the quality of our products, we ask for suggestions ___________had used the products.22. It is obvious to the students ___________they should get well prepared for their future.23. News came from the school ___________he had been admitted to Beijing University.24. The people in China are proud of ___________they achieved in the past thirty years.25. Tomorrow is Tom’s birthday. Have you got any idea ______the party is to be held?26. The last time we had great fun was ___________we were visiting the Water Park.27. ___________we understand things has a lot to do with what we feel.28. ---I wonder ___________Mary has kept her figure after these years. --By working hard every day.29. I was surprised by her words, ___________made me recognize ___________silly I had been.30. It is difficult for us to imagine ___________life was like for slaves in the ancient world.31. Police have found ___________appears to be the lost ancient statue.32. ___________makes the book so extraordinary is the creative imagination of the writer.33. Experts believe ___________people can waste less food by shopping only when necessary.34. It’s good to know ___________the dogs will be well cared while we’re away.35. Don’t let any failures discourage you, for you never tell ___________close you may be to victory.36. ___________one of you breaks the window will have to pay for it.37. I want to be liked and loved for ___________I am inside.38. You must see to it ___________ the doors are locked before you leave the lab.39. Modern science has given clear evidence__________ smoking can lead to many diseases.40.Before the sales start, I make a list of ___________my kids will need for the coming season.41.___________ the boy failed again in the exam disappointed his mother42.It is none of your business___________ other people think about you. Believe yourself.43.___________is a fact that English is being accepted as an international language.44.He pointed to ___________ looked like a tomb and said, “Ghost.”45.Nobody is certain ___________ the future may hold.46.Everyone knew ___________ happened and ___________ she was worried47.You may depend on ___________ that all goods will be shipped abroad in time.48.You are saying that everyone should be equal, and this is ___________ I disagree.49. I can't remember _________ place Dr. Black comes from, either Oxford or Cambridge .50. There is no doubt the newly formed committee’s policy will be put into practice as scheduled.【小题狂练二】下列各句均有一处错误,请指出并纠正。
专题25 被动语态用法50题---2022年高考英语第一轮复习小题狂练(解析版)【被动语态思维导图】【被动语态高考考查动向】动向一、动词时态和语态综合考查动向二、短文改错be动词的增删动向三、主动形式表示被动意义动向四、被动语态和非谓语结合起来【小题狂练一】被动语态高考真题再练在空白处填1个适当的单词或括号内单词的正确形式。
1. (2022浙江1月卷) Travelling to conferences, lectures, workshops, and the like frequently by plane ___________(view) as important for scientists to get together and exchange information.2. (2021全国甲卷)The Xi'an City Wall is the most complete city wall that has survived China's long history. It __________ (build) originally to protect the city in the Tang dynasty and has now been completely restored (修复).3. (2021天津卷) Currently, about 35,000 works ____________(display) in over 300 rooms in the Louvre, and it would take a lifetime to see everything.4. (2021浙江1月卷) It is calculated by dividing a person’s weight in kg by their height in meters squared, and a BMI of between 19 and 25 ____________ (consider) healthy.5. (2021浙江6月卷) Mary's niece wrote, "The little home ____________(paint) white. It was sweet and fresh.6 (2020天津卷) The number of medical schools reached 18 in the early 1990s and ____________ (remain) around that level since.7. (2020全国I卷) “This really excites scientists,” Carle Pieters, a scientist at Brown University, says, “because it means we have the chance to obtain information about how the moon ____________ (construct)”.8. (2020全国III卷) The artist was sure he would __________ (choose), but when he presented his masterpiece to the emperor’s chief minister, the old man laughed.9. (2020北京卷) Single-use plastic bags are used at most a few times before they ____________ (throw) away.10. (2020浙江7月卷) And,as more children were born,more food ____________ (need). Agriculture gave people their first experience of the power of technology to change lives.【答案】1.is viewed/has been viewed2.was built3.are being displayed4.is considered5.was painted6.has remained7.is constructed8.be chosen9.are thrown 10.was needed【小题狂练二】被动语态单句语法填空再练在空白处填1个适当的单词或括号内单词的正确形式。
专题14 状语从句用法50题---2022年高考英语第一轮复习小题狂练(原卷版)【状语从句思维导图】【状语从句高考考查动向】动向一、比较状语从句用法动向二、时间状语从句用法动向三、易混句型用法辨析动向四、状语从句省略用法【小题狂练一】在空白处填1个适当的单词或括号内单词的正确形式。
1. (2021•全国乙) I also water the flowers in the yard and tidy up my own bedroom__________necessary.2. (2021•江苏改编) This actor often has the first two tricks planned before performing, and then goes for ______.3. (2021•天津改编) We all need to get involved in saving energy ________ it's at work, at home, or at school.4. (2021•新高考全国)The amazing thing about the spring is that the colder the temperature gets, the _______ (hot) the spring!5. (2021•浙江) When the house was built, it was much _________ (small) than it is today.6. (2020•全国Ⅲ) _______ he asked the villagers on the banks of the river where he could find the legendary artist, they smiled and pointed down the river.7. (2020•浙江) Farming produced more food per person _________ hunting and gathering, so people were able to raise more children.8. (2020•江苏改编) They decide to have more workers for the proje ct so ________ it won’t be delayed.9. (2020﹒天津改编)—Why do people like pop music? I hate it so much.—__________though it is not your style, that doesn’t mean it is bad.10. (2019•天津改编) Tom is so independent that he never asks his parents' opinion _________ hewants their support.11.(2019•江苏改编) The doctor shares his phone number with the patients in __________ they need medical assistance.12. (2019•全国III) On our way to the house,it was raining __________ hard that we couldn't help wondering how long it would take to get there. It was in the middle of Pearl City.13. (2018•北京改编)_________ we don’t stop climate change, many animals and plants in the world will be gone.14. (2018•江苏改编) _______ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.15. (2018•全国I)While running regularly can’t make you live forever, the review says it is more effective at lengthening life ______ walking, cycling or swimming.16. (2018•全国III)Corn uses less water ______ rice and creates less fertilizer (化肥) runoff.17. (2018•全国II) The games my parents taught me _______ I was a child turned out to be very useful later in my life.18. (2017•江苏改编) Located _______ the Belt meets the Road, Jiangsu will contribute more to the Belt and Road construction.19. The little boy won’t go to sleep _________ his mother tells him a story.20. Tom was about to close the windows_________ his attention was caught by a bird.21. The old man asked Lucy to move to another chair _______ he wanted to sit next to his wife.22. Because of the heavy traffic, it was already time for lunch break _________ she got to her office.23. I really enjoy listening to music ________ it helps me relax and takes my mind away from other cares of the day.24. _________serious a problem you may have, you should gather your courage to face the challenge.25. How can you expect to learn anything _________ you never listen?26. Please remind me_________ he said he was going. I may be in time to see him off.27. His plan was such a good one _________we all agreed to accept it.28. I had just stepped out of the bathroom and was busily drying myself with a towel _________I heard the steps.29. He was about halfway through his meal _________a familiar voice came to his ears.30. _________ he had not hurt his leg, John would have won the race.31. The field research will take Joan and Paul about five months; it will be a long time _________ we meet them again.32. He was told that it would be at least three more months _________ he could recover and return to work.33. Pop music is such an important part of society _________ it has even influenced our language.34. _________the weather is like tomorrow, our ship will set sail for Macao.35. I'd like to study law at university ________ my cousin prefers geography.36. Strange _________ it might sound, his idea was accepted by all the people at the meeting.37. One can always manage to do more things, no matter _________full one’s schedule is in life.38. “You can’t judge a book by its cover,” _________ the old saying goes.39. I have heard a lot of good things about you _________I came back from abroad.40. I had hardly got to the office _________ my wife phone me to go back home at once.41. A number of high buildings have arisen _________ there was nothing a year ago but ruins.42. All the photographs in this book, _______ stated otherwise, date from the 1950s.43. Hot _______the night air was, we slept deeply because we were so tired after the long journey.44. Tom looked upon the test as an obstacle _______ his classmates regarded it as a challenge.45. It doesn’t matter _________you turn right or left at the crossing ---both roads lead to the park.46. I’m sorry you’ve been waiting so long, but it’ll still be some time _________ Brian gets back.47. Nancy enjoyed herself so much _________ she visited her friends in Sydney last year.48. _________well prepared you are, you still need a lot of luck in mountain climbing.49. I would appreciate it _______ you call back this afternoon for the doctor's appointment.50. He rushed out of the room _________I could say a word.51. __________the president is in favor of the plan or not, we will carry it out.52. After the war, a new school building was put up ________ there had once been a theatre.53. They promised to develop a software package, _________ difficulty they might have.54. That was really a splendid e vening. It’s years _________ I enjoyed myself so much.55. Once __________(print), this dictionary will be very popular.56. He speaks English so fluently as if he _________(be) a native speaker.57. If it ____________(rain) tomorrow, we won't go fishing.58. Not until he told me the truth did I realize what _____________(happen).59. No sooner _________he ________(arrive) home than it began to rain.60. The harder you work, the greater progress you_________(make).【小题狂练二】下列各句均有一处错误,请指出并纠正。
高中小题狂练试题及答案一、选择题1. 根据题目分析,下列哪个选项是正确的?A. 地球是平的B. 光速是可变的C. 氧气是可燃的D. 水在标准大气压下沸点是100℃答案:D2. 以下哪个历史事件标志着中国近代史的开端?A. 鸦片战争B. 甲午战争C. 辛亥革命D. 五四运动答案:A3. 在数学中,下列哪个表达式表示的是二次方程?A. \( x + 2 = 0 \)B. \( x^2 + 3x + 2 = 0 \)C. \( x^3 - 5x^2 + 6x = 0 \)D. \( 2x - 1 \)答案:B二、填空题4. 根据题目所给信息,中国最大的淡水湖是________。
答案:鄱阳湖5. 在化学中,元素周期表的第1族元素被称为________。
答案:碱金属6. 根据题目所给信息,下列哪个方程式表示的是光合作用?\( 6CO_2 + 6H_2O + \text{光能} \rightarrow \text{有机物} + 6O_2 \)答案:正确三、简答题7. 请简述牛顿第三定律的内容。
答案:牛顿第三定律,也称为作用与反作用定律,指出:对于任何两个相互作用的物体,它们之间的作用力和反作用力总是大小相等、方向相反。
8. 请解释什么是温室效应,并简述其对环境可能造成的影响。
答案:温室效应是指地球大气层中的某些气体(如二氧化碳、甲烷等)能够吸收和重新辐射地表反射的太阳辐射,导致地球表面温度升高的现象。
温室效应可能导致全球气候变暖,极端天气事件增多,海平面上升,生态系统受到影响等。
四、计算题9. 已知一个物体的质量为5千克,受到的重力加速度为9.8米/秒²,求该物体受到的重力大小。
答案:物体受到的重力大小可以通过公式 \( F = m \times g \) 计算,其中 \( m \) 是质量,\( g \) 是重力加速度。
所以,\( F = 5 \times 9.8 = 49 \) 牛顿。
结束语:本试题及答案涵盖了高中阶段的多个学科,旨在帮助学生巩固基础知识,提高解题能力。
2024-2025学年五年级数学上册典型例题系列第四单元专练篇·01:平行四边形”小题狂练“一、填空题。
1.平行四边形面积公式的推导过程。
(如图)把平行四边形沿着( )剪开,将三角形平移后,可以拼成一个( ),它的长与平行四边形的( )相等,它的宽与平行四边形的( )相等,它的面积与平行四边形的面积( )。
因为长方形的面积=长( )宽,所以平行四边形的面积=( ),用字母表示是( )。
2.一个平行四边形的底是8cm,高是6cm,面积是( )cm2。
3.一个平行四边形的面积是450cm2,底是25cm,这条底边上的高是( )cm。
4.一块平行四边形土地,面积是8公顷,高是400米,底是( )米。
5.一个平行四边形,底是8cm,高是2cm,如果底不变,高增加3cm,则面积增加( );如果底和高都扩大到原来的3倍,则面积扩大到原来的( )倍。
6.下图中,长方形的面积是20cm2,平行四边形的面积是( )cm2。
7.如图,把一个长方形框架拉一拉,使它成为一个平行四边形,它的周长( ),它的面积( )。
(填“变大”、“变小”、“不变”、“无法确定”)8.如图,一个平行四边形相邻两条边分别是6cm、9cm,量得一条高8cm。
这个平行四边形面积是( )2cm。
9.如图平行四边形中阴影部分是边长4cm的正方形,这个平行四边形的面积是( )平方厘米。
10.把一个长为8cm,宽为6cm的长方形框架拉成一个高为7cm的平行四边形,这个平行四边形的面积是( )cm2。
11.如图,一个平行四边形框,拉动平行四边形的对角后,它围起来的面积会发生变化。
当拉成( )形后,它围起来的面积最大,面积最大是( )cm2。
12.随着人们生活水平的快速提升,汽车量飞速增长,开车就医成为普遍现象。
某医院打算扩建旧停车场(旧停车场如图所示),如果把旧停车场的底和高都扩大到原来的2倍,那么新停车场的面积是( )。
二、选择题。
13.用木条做一个长18cm、宽15cm的长方形框,如果把它拉成一个平行四边形。
九年级小题狂练—一元二次方程实际问题压轴题1、某大型超市开展``惊喜国庆''低价让利促销活动,小红妈妈与10位同事在国庆节这一天到该超市购物,他们准备在同一收银台结账,现在知道其中有2人购物总金额都超过800元,除此之外,还有3人购物总金额共172元,其余5人购物金额都比172元少.
(1)如果10人中,有3人的购物金额一样,且为整数,求这3人购物金额的最小可能值.
(2)如果10人中,有2人的购物金额一样,且为整数,求这两人购物金额的最小可能值.
2、某商店经销一种品牌的空调,其中某一型号的空调每台进价为$m$元,商店将进价提高$30\%$后作为零售价进行销售,一段时间后,商店又以$9$折优惠价促销,这时该型号空调的零售价为____元.
3、某商店经销一种品牌的空调,其中某一型号的空调每台进价为$m$元,商店将进价提高$30\%$后作为零售价进行销售,一段时间后,商店又以$9$折优惠价促销,这时该型号空调的零售价为____元.
4、某大型超市开展``惊喜国庆''低价让利促销活动,小红妈妈与10位同事在国庆节这一天到该超市购物,他们准备在同一收银台结账,现在知道其中
有2人购物总金额都超过800元,除此之外,还有3人购物总金额共172元,其余5人购物金额都比172元少.
(1)如果10人中,有3人的购物金额一样,且为整数,求这3人购物金额的最小可能值.
(2)如果10人中,有2人的购物金额一样,且为整数,求这两人购物金额的最小可能值.。
小题狂练(一)(限时40分钟)一、选择题(本大题共12小题,每题5分,共60分)1.已知集合A={x|1<x<3},B={x|1<log2x<2},那么A∩B等于A.{x|0<x<3} B.{x|2<x<3} C.{x|1<x<3} D.{x|1<x<4}2.复数z=(x∈R,i是虚数单位)是实数,那么x的值为A.3 B.-3 C.0 D.3.“k=1”是“直线x-y+k=0与圆x2+y2=1相交”的A.充分没必要要条件B.必要不充分条件C.充要条件D.既不充分又没必要要条件4.已知函数f(x)=那么f=A. B.e C.-D.-e5.假设圆C的半径为1,圆心在第一象限,且与直线4x-3y=0和x轴相切,那么该圆的标准方程是A.(x-3)2+2=1B.(x-2)2+(y-1)2=1C.(x-1)2+(y-3)2=+(y-1)2=16.已知某几何体的三视图如以下图,其中正(主)视图为半径为1,那么该几何体体积为A.24-π B.24-C.24-π D.24-7.已知函数f(x)=2cos,下面四个结论中正确的选项是A.函数f(x)的最小正周期为2π B.函数f(x)的图象关于直线x=对称C.函数f(x)的图象是由y=2cos 2x的图象向左平移个单位取得D.函数f是奇函数8.执行如下图的程序框图,那么输出的n为A.3 B.4 C.5 D.69.实数x,y知足假设目标函数z=x+y取得最大值4,那么实数a的值为A.4 B.3 C.2 D.10.已知数列{a n},{b n}知足a1=1,且a n,a n+1是函数f(x)=x2-b n x+2n的两个零点,那么b10等于A.24 B.32 C.48 D.6411.已知函数f(x)=a x-1+3(a>0且a≠1)的图象过一个定点P,且点P在直线mx+ny-1=0(m>0,且n>0)上,那么+的最小值是A.12 B.16 C.25 D.2412.已知点F1,F2别离是双曲线-=1(a>0,b>0)的左、右核心,过F1且垂直于x轴的直线与双曲线交于A,B两点,假设△ABF2是锐角三角形,那么该双曲线离心率的取值范围是().A.(1,) B.(,2)C.(1+,+∞) D.(1,1+)二、填空题(本大题共4小题,每题4分,共16分)13.抛物线y=2x2的准线方程是_______________________________________.14.某中学从6名品学兼优的同窗当选出4名去进行为期三天的环保知识宣传活动,每人一天,要求礼拜天有2人参加,礼拜五、礼拜六各有1人参加,那么不同的选派方案的种数为________.15.袋中有3个黑球,1个红球.从中任取2个,取到一个黑球得0分,取到一个红球得2分,那么所得分数ξ的数学期望E(ξ)=________.16.已知=2,=3,=4,…,假设=6(a,t均为正实数),类比以上等式可推测a,t的值,那么a+t=________.小题狂练(二)(限时40分钟)一、选择题(本大题共12小题,每题5分,共60分)1.复数z=(2+i)i的虚部是A.2 B.-2 C.2i D.-2i2.已知全集U=R,集合A={x|x+1<0},B={x|x-3<0},那么集合(∁U A)∩B=A.{x|-1≤x<3} B.{x|-1<x<3}C.{x|x<-1} D.{x|x>3}3.“a=1”是“函数f(x)=lg(ax+1)在(0,+∞)单调递增”的A.充分没必要要条件B.充分必要条件C.必要不充分条件D.既不充分也没必要要条件4.设数列{a n}是等差数列,假设a3+a4+a5=12,那么a1+a2+…+a7=A.14 B.21 C.28 D.355.某程序的框图如下图,那么运行该程序后输出的B值是A.5 B.11 C.23 D.47第5题图第6题图6.已知概念在R上的函数f(x),其导函数f′(x)的图象如下图,那么以下表达正确的选项是().A.f(b)>f(c)>f(d)B.f(b)>f(a)>f(e)C.f(c)>f(b)>f(a)D.f(c)>f(e)>f(d)7.假设实数x,y知足不等式组:那么该约束条件所围成的平面区域的面积是A.3 B. C.2 D.28.假设函数f(x)=sin ωx+cos ωx(ω>0)的最小正周期为π,那么它的图象的一个对称中心为A. B. C. D.9.一个空间几何体的三视图及其尺寸如下图,那么该空间几何体的体积是A. B. C.14D.710.函数f(x)在概念域R上不是常数函数,且f(x)知足条件:对任意x∈R,都有f(2+x)=f(2-x),f(1+x)=-f(x),那么f(x)是A.奇函数但非偶函数B.偶函数但非奇函数C.既是奇函数又是偶函数D.是非奇非偶函数11.设点P是双曲线-=1(a>0,b>0)与圆x2+y2=a2+b2在第一象限的交点,F1、F2别离是双曲线的左、右核心,且|PF1|=3|PF2|,那么双曲线的离心率为A. B. C. D.12.已知函数y=f(x)是概念在R上且以3为周期的奇函数,当x∈时,f(x)=ln(x2-x+1),那么函数f(x)在区间[0,6]上的零点个数为().A.3 B.5 C.7 D.9二、填空题(本大题共4小题,每题4分,共16分)13.已知函数y=f(x)的图象在点M(1,f(1))处的切线方程是2x-3y+1=0,那么f(1)+f′(1)=________.14.二项式6的展开式中的常数项为________.15.向量a=(-1,1)在向量b=(3,4)方向上的投影为____________.16.如图,矩形OABC内的阴影部份是由曲线f(x)=sin x(x∈(0,π))及直线x=a(a∈(0,π))与x轴围成,向矩形OABC内随机抛掷一点,假设落在阴影部份的概率为,那么a的值是________.小题狂练(三)(限时40分钟)一、选择题(本大题共12小题,每题5分,共60分)1.已知全集U=R,集合A={1,2,3,4,5},B=[2,+∞),那么图中阴影部份所表示的集合为A.{0,1,2}B.{0,1}C.{1,2}D.{1}2.命题“∃x∈R,x3-2x+1=0”的否定是A.∃x∈R,x3-2x+1≠0B.不存在x∈R,x3-2x+1≠0C.∀x∈R,x3-2x+1=0D.∀x∈R,x3-2x+1≠03.设i是虚数单位,那么=A.-i B.1+i C.+i D.1-i4.在等比数列{a n}中,a1=8,a4=a3a5,那么a7=A. B. C. D.5.要取得函数y=sin的图象,只需将函数y=sin 2x的图象A.向左平移个单位B.向右平移个单位C.向左平移个单位D.向右平移个单位6.设随机变量X服从正态散布N(0,1),P(X>1)=p,那么P(X>-1)=A.p B.1-p C.1-2p D.2p7.在△ABC中,C=90°,且CA=CB=3,点M知足=2,那么·等于A.2 B.3 C.4 D.68.某同窗设计右面的程序框图用以计算12+22+32+…+202的值,那么在判定框中应填写().A.i≤19B.i≥19C.i≤20D.i≤219.已知函数f(x)=sin x-x(x∈[0,π]),那么以下结论正确的选项是A.f(x)在上是增函数B.f(x)在上是减函数C.∃x∈[0,π],f(x)>f D.∀x∈[0,π],f(x)≤f10.函数y=e sin x(-π≤x≤π)的大致图象为11.过点(-2,0)且倾斜角为的直线l与圆x2+y2=5相交于M、N两点,那么线段MN的长为A.2 B. 3C.2 D.612.已知抛物线y2=4x的准线过双曲线-=1(a>0,b>0)的左极点,且此双曲线的一条渐近线方程为y=2x,那么双曲线的焦距等于A. B.2C. D.2二、填空题(本大题共4小题,每题4分,共16分)13.在区间[0,9]上随机取一实数x,那么该实数x知足不等式1≤log2x≤2的概率为________.14.一个棱锥的三视图如下图,那么那个棱锥的体积为________.15.已知双曲线k x2-y2=1的一条渐近线与直线2x+y+1=0垂直,那么双曲线的离心率为________.16.已知函数f(x)=3 sin(ω>0)和g(x)=2 cos(2x+φ)+1的图象的对称轴完全相同.假设x∈,那么f(x)的取值范围是________.小题狂练(四)(限时40分钟)一、选择题(本大题共12小题,每题5分,共60分)1.已知集合A={y|x2+y2=1}和集合B={y|y=x2},那么A∩B等于A.(0,1) B.[0,1] C.(0,+∞) D.{(0,1),(1,0)}2.复数(3+4i)i(其中i为虚数单位)在复平面上对应的点位于A.第一象限B.第二象限C.第三象限D.第四象限3.“α=2kπ-(k∈Z)”是“tan α=-1”的A.充分没必要要条件B.必要不充分条件C.充要条件D.既不充分也没必要要条件4.将参加夏令营的500名学生编号为:001,002,…,500,采纳系统抽样的方式抽取一个容量为50的样本,且随机抽得的号码为003,这500名学生分住在三个营区,从001到200在第一营区,从201到355在第二营区,从356到500在第三营区,三个营区被抽中的人数为A.20,15,15 B.20,16,14C.12,14,16 D.21,15,145.沿一个正方体三个面的对角线截得的几何体如下图,那么该几何体的侧(左)视图为6.如图是一个算法的流程图,假设输出的结果是31,那么判定框中的整数M的值为A.3 B.4 C.5 D.67.设F1,F2是双曲线x2-=1的两个核心,P是双曲线上的一点,且3|PF1|=4|PF2|,那么|PF1|=A.8 B.6 C.4 D.28.假设d x=3+ln 2(a>1),那么a的值是A.2 B.3 C.4 D.69.函数f(x)=e1-x2的部份图象大致是10.已知向量a=(4,3),b=(-2,1),若是向量a+λb与b垂直,那么|2a-λb|的值为A.1 B. C.5 D.511.在以下的表格中,若是每格填上一个数后,每一横行成等差数列,每一纵列成等比数列,那么x+y+z的值cos 0 2sin tanxyzB.2 C.3 D.412.已知函数f(x)的概念域为[-1,5],部份对应值如下表. x-1 0 4 5f(x)的导函数y=f′(x)的图象如下图.f(x) 1 2 2 1以下关于函数f(x)的命题:①函数y=f(x)是周期函数;②函数f(x)在[0,2]是减函数;③若是当x∈[-1,t]时,f(x)的最大值是2,那么t的最大值为4;④当1<a<2时,函数y=f(x)-a有4个零点.其中真命题的个数是A.4 B.3 C.2 D.1二、填空题(本大题共4小题,每题4分,共16分)13.已知圆C过点(1,0),且圆心在x轴的正半轴上,直线l:y=x-1被该圆所截得的弦长为2,那么圆C的标准方程为________________.14.在△ABC中,角A,B,C所对应的边别离为a,b,c且c=3,a=2,a=2b sin A,那么△ABC的面积为________.15.观看以劣等式:1=1, 2+3+4=9, 3+4+5+6+7=25, 4+5+6+7+8+9+10=49……照此规律,第n个等式为________.16. 下面四个命题:①已知函数f(x)=sin x,在区间[0,π]上任取一点x0,那么使得f(x0)>的概率为;②函数y=sin 2x的图象向左平移个单位取得函数y=sin的图象;③命题“∀x∈R,x2-x+1≥”的否定是“∃x0∈R,x-x0+1<”;④假设函数f(x)是概念在R上的奇函数,且f(x+4)=f(x),那么f(2 012)=0.其中所有正确命题的序号是________.小题狂练(五)(限时40分钟)一、选择题(本大题共12小题,每题5分,共60分)1.已知集合A={x|x>1},B={x|x<m},且A∪B=R,那么m的值能够是A.-1 B.0 C.1 D.22.已知=2+i,那么复数z的共轭复数为A.3+i B.3-I C.-3-i D.-3+i3.已知直线l⊥平面α,直线m⊂平面β,有下面四个命题:①α∥β⇒l⊥m;②α⊥β⇒l∥m;③l∥m⇒α⊥β;④l⊥m⇒α∥β.其中正确的命题A.①② B.②④ C.①③ D.③④4.设p:log2x<0,q:x-1>1,那么p是q的A.充要条件B.充分没必要要条件C.必要不充分条件D.既不充分也没必要要条件5.函数f(x)=A sin(ωx+φ)的部份图象如下图,那么ω、φ的值别离为A.2,0 B.2,C.2,-D.2,6.假设函数f(x)=x3+ax2+3x-9,已知f(x)在x=-3时取得极值,那么a的值等于A.2 B.3 C.4 D.57.“a=b”是“直线y=x+2与圆(x-a)2+(y-b)2=2相切”的A.充分没必要要条件B.必要不充分条件C.充要条件D.既不充分也没必要要条件8.正弦曲线与x=0和直线x=及x轴所围成的平面图形的面积是A.1 B.2 C.3 D.49.数列{a n}是公差不为0的等差数列,且a1,a3,a7为等比数列{b n}的持续三项,那么数列{b n}的公比为A. B.4 C.2 D.10.执行如下图的程序框图,假设输出结果为15,那么M处的条件为().A.k≥16 B.k<8C.k<16 D.k≥811.已知抛物线x2=2py(p>0)的核心F恰好是双曲线-=1(a>0,b>0)的一个核心,且两条曲线交点的连线过点F,那么该双曲线的离心率为A. B.1±C.1+D.无法确定12.对任意的实数a,b,记max{a,b}=假设F(x)=max{f(x),g(x)}(x∈R),其中奇函数y=f(x)在x=1时有极小值-2,y=g(x)是正比例函数,函数y=f(x)(x≥0)与函数y=g(x)的图象如下图,那么以下关于函数y=F(x)的说法中,正确的选项是().A.y=F(x)为奇函数B.y=F(x)有极大值F(1)且有极小值F(-1)C.y=F(x)的最小值为-2且最大值为2D.y=F(x)在(-3,0)上不是单调函数二、填空题(本大题共4小题,每题4分,共16分)13.已知向量a=(3,-2),b=(3m-1,4-m),假设a⊥b,那么m的值为________.14.设点P是双曲线-=1(a>0,b>0)与圆x2+y2=a2+b2在第一象限的交点,其中F1、F2别离是双曲线的左、右核心,且|PF1|=2|PF2|,那么双曲线的离心率为________.15.在平面直角坐标系中,不等式组,所表示的平面区域的面积是9,那么实数a的值为________.16.已知函数f(x)=log a(2x-a)在区间上恒有f(x)>0,那么实数a的取值范围是________.小题狂练(六)(限时40分钟)一、选择题(本大题共12小题,每题5分,共60分)1.复数2=A.-3-4i B.-3+4iC.3-4i D.3+4i2.命题p:假设a·b<0,那么a与b的夹角为钝角.命题q:概念域为R的函数y=f(x)在(-∞,0)及(0,+∞)上都是增函数,那么f(x)在(-∞,+∞)上是增函数.以下说法正确的选项是A.“p或q”是真命题B.“p且q”是假命题C.“綈p”为假命题D.“綈q”为假命题3.函数f(x)=2x3-6x2+7在(0,2)内零点的个数为A.0 B.1 C.2 D.44.已知向量a=(x+1,2),b=(-1,x).假设a与b垂直,那么|b|=A.1 B. C.2 D.45.假设3sin α+cos α=0,那么的值为A. B. C. D.-26.由曲线y=x2,y=x3围成的封锁图形面积为A. B. C. D.7.已知函数f(x)=那么不等式f(x)>0的解的区间是A.(0,1)B.(-1,0)∪(0,1)C.(-1,1)D.(-∞,-1)∪(1,+∞)8.已知x,y知足约束条件假设目标函数z=ax+y(其中a为常数)仅在点处取得最大值,那么实数a 的取值范围是A.(-2,2) B.(0,1)C.(-1,1) D.(-1,0)9.执行如下图的程序框图,假设p=4,那么输出的S=A. B.C. D.10.已知数列{a n}知足log3a n+1=log3a n+1(n∈N*),且a2+a4+a6=9,那么log(a5+a7+a9)的值是A.-B.-5 C.5 D.11.某一随机变量ξ的散布列如下表,且E(ξ)=,那么m-n的值为ξ0 1 2 3P m nA.-B.C.D.-12.已知抛物线y2=2px(p>0)上一点M(1,m)(m>0)到其核心的距离为5,双曲线-y2=1的左极点为A,假设双曲线的一条渐近线与直线AM平行,那么实数a的值为().A. B. C. D.二、填空题(本大题共4小题,每题4分,共16分)13.已知函数y=2sin(ωx+φ)的部份图象如图,那么φ=________.14.设F1,F2为椭圆+y2=1的左、右核心,过椭圆中心任作一直线与椭圆交于P,Q两点,当四边形PF1QF2面积最大时,·的值等于________.15.在△ABC中,|BC|=4,且BC落在x轴上,BC中点为坐标原点,若是sin C-sin B=sin A,那么极点A的轨迹方程是________.16.方程2-x+x2=3的实数解的个数为________.。
物质跨膜运输的实例和方式小题狂练④小题是基础练小题提分快1.[2018·全国卷Ⅱ]下列有关物质跨膜运输的叙述,正确的是( )A.巨噬细胞摄入病原体的过程属于协助扩散B.固醇类激素进入靶细胞的过程属于主动运输C.神经细胞受到刺激时产生的Na+内流属于被动运输D.护肤品中的甘油进入皮肤细胞的过程属于主动运输答案:C解析:巨噬细胞摄入病原体的过程属于胞吞,A错误;固醇类激素如性激素以自由扩散的方式进入靶细胞,B错误;静息状态时,神经细胞膜外的Na+浓度高于膜内,受到刺激时产生的Na+内流是顺浓度梯度进行的,属于被动运输,C正确;护肤品中的甘油属于小分子脂溶性物质,以自由扩散的方式进入皮肤细胞,D错误。
2.[2019·云南民族大学附属月考]下列关于物质运输的叙述中,错误的是( )A.海带细胞通过主动运输积累I-等溶质,因而不会在浓度较高的海水中发生质壁分离B.神经递质通过突触前膜的方式与胰岛B细胞释放胰岛素的方式相同C.人体内红细胞、肾小管上皮细胞吸收葡萄糖的方式相同D.小肠绒毛上皮细胞吸收氨基酸和葡萄糖的方式相同答案:C解析:海带细胞通过主动运输积累I-等溶质,可增加细胞液的浓度,因而不会在浓度较高的海水中发生质壁分离,A正确;神经递质通过突触前膜的方式与胰岛B细胞释放胰岛素的方式都是胞吐,B正确;人体内红细胞吸收葡萄糖的方式为协助扩散,而肾小管上皮细胞吸收葡萄糖的方式为主动运输,C错误;小肠绒毛上皮细胞吸收氨基酸和葡萄糖的方式相同,均为主动运输,D正确。
3.[2019·石家庄普通高中月考]下列关于细胞物质输入和输出的叙述,错误的是( ) A.受O2浓度影响的物质运输方式一定需要载体B.性激素和胰岛素的运输方式不同C.水的跨膜运输是顺相对含量梯度的D.某些离子和一些较大的分子可以顺浓度梯度进行协助扩散答案:A解析:当运输的物质是O2时,其运输方式为自由扩散,受O2浓度影响但不需要载体,A 错误;性激素为固醇类物质,运输方式是自由扩散;胰岛素是蛋白质,运输方式是胞吐,B 正确;水的跨膜运输是顺相对含量梯度的,即由水分子多的一侧向水分子少的一侧运输,C正确;某些离子和一些较大的分子可以顺浓度梯度进行协助扩散,如神经细胞内Na+的内流,葡萄糖进入红细胞,D正确。
小题狂练(四)1.已知集合M ={1,2,3},N ={2,3,4},则M ∩N =________.2.已知复数z 满足(z -2)i =1+i(i 为虚数单位),则z 的模为________.3.为了分析某篮球运动员在比赛中发挥的稳定程度,统计了该运动员在6场比赛中的得分,用茎叶图表示如图所示,则该组数据的方差为________.4.在△ABC 中,a =8,B =60°,C =45°,则b =________.5.若过正三角形ABC 的顶点A 任作一条直线l ,则l 与线段BC 相交的概率为________.6.已知函数y =a n x 2(a n ≠0,n ∈N *)的图象在x =1处的切线斜率为2a n -1+1(n ≥2),且当n =1时其图象过点(2,8),则a 7的值为________.7.已知函数y =sin(ωx +φ)⎝ ⎛⎭⎪⎫ω>0,0<φ≤π2的部分图象如图,则φ的值为________.8.在平面直角坐标系xOy 中,直线3x +4y -5=0与圆x 2+y 2=4相交于A ,B 两点,则弦AB 的长等于________.9.如图是一个算法的流程图,则最后输出的S =________.10.设l 是一条直线,α,β,γ是不同的平面,则在下列命题中,假命题是________.①如果α⊥β,那么α内一定存在直线平行于β②如果α不垂直于β,那么α内一定不存在直线垂直于β③如果α⊥γ,β⊥γ,α∩β=l ,那么l ⊥γ④如果α⊥β,l 与α,β都相交,那么l 与α,β所成的角互余11.已知函数f (x )=x 33+ax 22+2bx +c 在区间(0,1)内取极大值,在区间(1,2)内取极小值,则z =(a +3)2+b 2的取值范围为________.12.平面向量a ,b 满足|a +2b |=5,且a +2b 平行于直线y =2x +1,若b =(2,-1),则a =________.13.(2012·南师大附中阶段测试)已知函数f (x )=|x 2+2x -1|,若a <b <-1,且f (a )=f (b ),则ab +a +b 的取值范围是________.14.定义在实数集上的偶函数f (x )满足f (x +2)=f (x ),且f (x )在[-3,-2]上单调递减,又α,β是锐角三角形的两内角,则f (sin α)与f (cos β)的大小关系是________.参考答案小题狂练(四)1.解析 M ∩N ={1,2,3}∩{2,3,4}={2,3}.答案 M ∩N ={2,3}2.解析 由(z -2)i =1+i ,得z =1+i i +2=3-i ,所以|z |=10.答案 103.解析 平均数x =14+17+18+18+20+216=18,故方差s 2=16(42+12+02+02+22+32)=5. 答案 54.解析 由正弦定理得b sin B =c sin C ,∴b =8sin 60°sin 45°=4 6.答案 4 65.解析 ∠BAC =60°,故所求的概率60°360°=16.答案 166.解析 因为y =a n x 2在x =1处的切线斜率为2a n ,所以2a n =2a n -1+1(n ≥2),即a n =a n -1+12(n ≥2),又8=4a 1⇒a 1=2,所以a 7=a 1+6×12=5.答案 57.解析 由三角函数图象可得周期T =2⎝ ⎛⎭⎪⎫5π6-π3=π=2πω,解得ω=2.由函数图象过点⎝ ⎛⎭⎪⎫π3,0,所以sin ⎝ ⎛⎭⎪⎫2×π3+φ=0⇒φ=π3+2k π,k ∈Z ,且0<φ≤π2,所以φ=π3.答案 π38.解析 圆x 2+y 2=4的圆心O (0,0)到直线3x +4y -5=0的距离d =|-5|5=1,弦AB 的长|AB |=2r 2-d 2=2 3.答案 2 39.解析 这是一个典型的当型循环结构,当n =1,3,5,7,9,11时满足条件,执行下面的语句,S =1+3+5+7+9+11=36,当n =13时不满足条件,退出循环,执行输出S =36.答案 3610.解析 如果α⊥β,那么α内一定存在直线平行于β,即命题①正确;如果α不垂直于β,那么α内一定不存在直线垂直于β,即命题②正确;如果α⊥γ,β⊥γ,α∩β=l ,那么l ⊥γ,即命题③正确;如果α⊥β,l 与α,β都相交,那么l 与α,β所成的角不一定互余,即命题④不正确.答案 ④11.解析 因为函数f (x )在区间(0,1)内取极大值,在区间(1,2)内取极小值,所以⎩⎨⎧ f ′(0)>0,f ′(1)<0,f ′(2)>0,即⎩⎨⎧ b <0,1+a +2b <0,a +b +2>0,对应可行域如图,目标函数z =(a +3)2+b 2的几何意义是可行域上的点(a ,b )到定点P (-3,0)的距离的平方,点P 到边界a +b +2=0的距离的平方为⎝ ⎛⎭⎪⎫122=12,到点(-1,0)的距离的平方为4,因为可行域不含边界,所以z 的取值范围是⎝ ⎛⎭⎪⎫12,4. 答案 ⎝ ⎛⎭⎪⎫12,4 12.解析 因为a +2b 平行于直线y =2x +1,所以可设a +2b =(m,2m ),所以|a +2b |2=5 m 2=5,解得m =1或-1,a +2b =(1,2)或(-1,-2),所以a =(1,2)-(4-2)=(-3,4)或(-1,-2)-(4,-2)=(-5,0).答案 (-3,4)或(-5,0)13.解析 作出函数图象可知若a <b <-1,且f (a )=f (b ),即为a 2+2a -1=-(b 2+2b -1),整理得(a +1)2+(b +1)2=4,设⎩⎨⎧a =-1+2cos θ,b =-1+2sin θ,θ∈⎝ ⎛⎭⎪⎫π,5π4∪⎝ ⎛⎭⎪⎫5π4,3π2,所以ab +a +b =-1+2sin 2θ∈(-1,1).答案 (-1,1)14.解析 因为f (x +2)=f (x )⇒f (x )的周期为2,所以f (x ),x ∈[-1,0]的单调性与[-3,-2]一致,单调递减,又f (x )是偶函数,所以在[0,1]上单调递增.又α,β是锐角三角形的两个内角,所以π2<α+β<π⇒0<π2-β<α<π2⇒1>sin α>sin ⎝ ⎛⎭⎪⎫π2-β=cos β>0⇒f (sin α)>f (cos β).答案 f (sin α)>f (cos β)。
河南省信阳市高级中学2015-2016学年度三年级数学小题狂练(四)姓名:___________班级:___________考号:___________1.设全集{}1,2,3,4,5,6,7,8U =,集合{1,2,3,5}A =,{2,4,6}B =,则下图中的阴影部分表示的集合为( )A .{}2B .{}4,6C .{}1,3,5D .{}4,6,7,8答案及解析:1.B 2.在数列*)(233,15,}{11N n a a a a n n n ∈-==+中,则该数列中相邻两项的乘积是负数的是( )A .2221a a ⋅B . 2223a a ⋅C . 2324a a ⋅D .2425a a ⋅答案及解析:2.C3.已知向量a )2,1(-=x ,b ),4(y =且a ⊥b ,则93x y+的最小值为A..6 C .12 D.答案及解析:3.B4.设变量,x y 满足约束条件250200x y x y x +-≤⎧⎪--≤⎨⎪≥⎩,则目标函数231z x y =++的最大值( )A .11B .10C .9D .8.5答案及解析:4.B5.一个几何体的三视图如右图所示,则该几何体的体积是( )A .21B . 13C . 1D .65答案及解析:5.D6.某工厂有甲、乙、丙三类产品,其数量之比为1:2:4,现要用分层抽样的方法从中抽取140件产品进行质量检测,则乙类产品应抽取的件数为( ) A .20B .40C .60D .80答案及解析:6.B试题分析:由已知,乙类产品应抽取的件数为214040124⨯=++, 故选B .7.求135101S =++++ 的流程图程序如右图所示, 其中①应为 ( )A .101?A =B .101?A ≤C .101?A >D .101?A ≥答案及解析:7.B8.右图是一组样本数据的频率分布直方图,则依据图形中的数据,可以估计总体的平均数与中位数分别是A .12.5 12.5 B. 13 13 C .13.5 12.5 D. 13.5 13答案及解析:8.B9.下列函数中,对于∀x ∈R ,同时满足条件()()f x f x =-和(π)()f x f x -=的函数是(A )()sin =f x x (C )()cos =f x x (B )()sin cos =f x x x (D )22()cos sin =-f x x x答案及解析:9.D10.如图是挑战主持人大赛上,七位评委为某选手打出的分数的茎叶统计图,去掉一个最高分和一个最低分后,所剩数据的平均数和方差分别为 A .84,4.84 B .84,1.6 C .85,1.6 D .85,4答案及解析:10.C11.过原点且倾斜角为60的直线被圆0422=-+y y x 所截得的弦长为( ) A.答案及解析:11.A12.已知a n =log (n +1)(n +2)(n ∈N *).我们把使乘积a 1·a 2·a 3·…·a n 为整数的数n 叫做“优数”,则在区间(1,2004)内的所有优数的和为( ) A .1024B .2003C .2026D .2048答案及解析:12.C13.某厂对一批产品进行抽样检测,图2是抽检产品净重(单位:克)数据的频率分布直方图,样本数据分组为[76,78)、[78,80)、…、[84,86]。
小题狂练(四)(限时40分钟)
一、选择题(本大题共12小题,每小题5分,共60分)
1.已知集合A ={y |x 2+y 2=1}和集合B ={y |y =x 2},则A ∩B 等于 ( ).
A .(0,1)
B .[0,1]
C .(0,+∞)
D .{(0,1),(1,0)} 2.复数(3+4i)i(其中i 为虚数单位)在复平面上对应的点位于
( ).
A .第一象限
B .第二象限
C .第三象限
D .第四象限 3.“α=2k π-π
4(k ∈Z )”是“tan α=-1”的
( ). A .充分不必要条件 B .必要不充分条件
C .充要条件
D .既不充分也不必要条件
4.将参加夏令营的500名学生编号为:001,002,…,500,采用系统抽样的方法抽取一个容量为50的样本,且随机抽得的号码为003,这500名学生分住在三个营区,从001到200在第一营区,从201到355在第二营区,从356到500在第三营区,三个营区被抽中的人数为
( ).
A .20,15,15
B .20,16,14
C .12,14,16
D .21,15,14
5.沿一个正方体三个面的对角线截得的几何体如图,则该几何体的侧视图为 ( ).
6.如图是一个算法流程图,若输出的结果是31,则判断框中的整数M 的值为 ( ).
A .3
B .4
C .5
D .6
7.设F 1,F 2是双曲线x 2
-y 2
24=1的两个焦点, P 是双曲线上的一点,且3|PF 1|=4|PF 2|, 则|PF 1|= ( ).
A .8
B .6
C .4
D .2
8.若11
(2)a x dx x
+⎰=3+ln 2(a >1),则a 的值是
( ).
A .2
B .3
C .4
D .6
9.函数f(x)=e 1-x 2的部分图象大致是
( ).
10.已知向量a =(4,3),b =(-2,1),如果向量a +λb 与b 垂直,则|2a -λb |的值为
( ).
A .1 B. 5 C .5 D .5 5
11.在下列的表格中,如果每格填上一个数后,每一横行成等差数列,每一纵列成等比数列,那么x +y +z 的值为
( ).
cos 0 2 sin π
6 tan π4 x y
z
A.1 B .2 C .3 D .4 12.已知函数f (x )的定义域为[-1,5],部分对应值如下表.
x -1 0 4 5 f (x )
1
2
2
1
f (x )的导函数y =f ′(x )的图象如图所示.
下列关于函数f (x )的命题: ①函数y =f (x )是周期函数; ②函数f (x )在[0,2]是减函数;
③如果当x ∈[-1,t ]时,f (x )的最大值是2,那么t 的最大值为4;
④当1<a <2时,函数y =f (x )-a 有4个零点. 其中真命题的个数是
( ).
A .4
B .3
C .2
D .1 二、填空题(本大题共4小题,每小题4分,共16分)
13.已知圆C 过点(1,0),且圆心在x 轴的正半轴上,直线l :y =x -1被该圆所截得的弦长为22,则圆C 的标准方程为________________.
14.在△ABC 中,角A ,B ,C 所对应的边分别为a ,b ,c 且c =3,a =2,a =2b sin A ,则△ABC 的面积为________. 15.观察下列等式:
1=1 2+3+4=9 3+4+5+6+7=25 4+5+6+7+8+9+10=49 …… 照此规律,第n 个等式为________. 16. 下面四个命题:
①已知函数f (x )=sin x ,在区间[0,π]上任取一点x 0,则使得f (x 0)>12的概率为2
3; ②函数y =sin 2x 的图象向左平移π3个单位得到函数y =sin ⎝ ⎛
⎭⎪⎫2x +π3的图象;
③命题“∀x ∈R ,x 2-x +1≥3
4”的否定是 “∃x 0∈R ,x 2
0-x 0+1<34”;
④若函数f (x )是定义在R 上的奇函数,且f (x +4)=f (x ),则f (2 012)=0. 其中所有正确命题的序号是________.
参考答案
【小题狂练(四)】
1.B
2.B [因为(3+4i)·i =-4+3i ,所以在复平面上对应的点位于第二象限,选B.]
3.A[由α=2kπ-π
4(k∈Z)可得tan α=-1;而由tan α=-1得α=kπ-
π
4(k∈Z),故选
A.]
4.B[根据系统抽样特点,被抽到号码l=10k+3,k∈N.第353号被抽到,因此第二营区应有16人,所以三个营区被抽中的人数为20,16,14.]
5.B
6.B[当A=1,S=1时,执行S=S+2A,A=A+1后,S的值为3,A的值为2,……依次类推,当A=4时,执行S=S+2A,A=A+1后,S的值为31,A的值为5,所以M 的值为4.]
7.A[由题意可知a=1,且点P在右支上,∴|PF1|-|PF2|=2,又3|PF1|=4|PF2|,∴|PF1|=8.]
8.A[由题意知,a2+ln a-1=3+ln 2,解得a=2,故选A.]
9.C[容易得出函数f(x)是偶函数,且f(x)>0恒成立,故选C.]
10.D[a+λb=(4,3)+λ(-2,1)=(4-2λ,3+λ),
∵(a+λb)⊥b,
∴(4-2λ,3+λ)·(-2,1)=0,
解得λ=1,2a-λb=(8,6)-(-2,1)=(10,5),
|2a-λb|=102+52=5 5.]
11.A[先算出三角函数值,然后根据每一横行成等差数列,每一纵列成等比数列,填表可得,
13
2
2
5
2
3
1 21
5
4
3
2
1
4x=1 2
1
8y=5 16
1
16z=3 16
所以选A.]
12.D[①显然错误;③容易造成错觉,t max=5;④错误,f(2)的不确定影响了正确性;
②正确,可有f′(x)<0得到.]
13.解析待定系数法求圆的方程.
答案(x-3)2+y2=4
14.解析由题意知,b sin A=1,又由正弦定理得:
b sin A=2sin B,故解得sin B=1
2,所以△ABC的面积为
1
2ac sin B=
3
2.
答案3 2
15.解析等式左边第一个数为对应行数,每行的整数个数为奇数个,等式右边为对应奇数个的平方,所以通项公式为n+(n+1)+(n+2)+…+(3n-2)=(2n-1)2.
答案n+(n+1)+(n+2)+…+(3n-2)=(2n-1)2
16.解析②错误,应该向左平移π6;
①使得f(x0)>1
2的概率为p=
5
6π-
1
6π
π=
2
3;
④f(2 012)=f(0)=0. 答案①③④。