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云南省昆明一中2018届高三考前适应性训练英语试卷(含答案)

云南省昆明一中2018届高三考前适应性训练英语试卷(含答案)
云南省昆明一中2018届高三考前适应性训练英语试卷(含答案)

2018届云南省昆明第一中学高三第八次月考

英语试卷

选择题

第一部分阅读理解(共两节,满分40分)

第一节(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的四个选项A、B、C、D中,选出最佳选项,并在答题卡上将该项涂黑。

A

Organizations that support women and promote equality and fairness in wages, in behavior, and with opportunities have spent years putting women’s rights first as their missions. Check out the institutions that are helping fight for what’s fair, no matter where women are in the world.

School Girls Unite

This nonprofit deals with education discrimination among young women in developing countries. In Mali, Africa, for example, only one in four girls make it to the 7th grade. School Girls Unite sponsors the girls’ education, often at a cost as little as $75 per child, and follows them to complete their education. Every Mother Counts

Model Christy Turlington Burns founded this activist group that seeks to improve medical care for mothers around the world by training professionals, improving transportation to care facilities, and donating crucial supplies to clinics. The organization has arranged funds that have improved mother mortality rates in Tanzania, Haiti, and India.

ANITA B. ORG

Since 1987, this social enterprise has pursued the mission statement of founder Anita Borg by putting women in a position to excel in the technology field. The group provides resources for education in coding and diversity both in the U.S. and abroad. In India, they organize career fairs for women only, offering companies the chance to improve their gender diversity in the workforce.

Dress For Success

Wearing appropriate clothes for a job interview is vital for potential employees. For over 20 years, the caregivers at Dress for Success have been helping women realize their professional goals by providing suits they might not otherwise be able to afford. The nonprofit accepts clothing donations and then distributes them to countries and areas in need.

1.School Girls Unite helps women by .

A. training female instructors for the school

B. providing free guidance on girl s’education

C. financially aiding girls with their education

D. asking girls’parents to support their

education

2.Who may benefit from Every Mother Counts?

A. A woman who majors in medicine

B. A woman who is to give birth soon

C. A mother suffering from discrimination

D. A single mother raising children herself

3.Which organizations aim at women employment?

A. ANITA

B. ORG and Dress for Success B. School Girls Unite and ANITA B. ORG

C. ANITA B. ORG and Every Mother Counts

D. School Girls Unite and Every Mother Counts

B

Throughout high school, I failed to volunteer as much as I had wanted. As a college student, I am still busy with maintaining my grades and staying involved in my school’s community, but I decided to get out of my comfort zone and volunteer for America Recycles Day. And this turned out to be an awesome experience.

The organization Ouachita Green put together this event, which allowed people from the Monroe area of Louisiana to bring in their recyclables, free of charge. Unfortunately, Louisiana is lacking in environmentally-friendly initiatives(倡议) so recycling is not offered to most people in our community. In contrast, it is required by law to recycle back in my home New Jersey. This truth astonished me, but more importantly, it encouraged me to seek change.

I meant to make a difference. Through joint efforts, my classmates and I ended up starting the Green Club at the University of Louisiana. It focuses on creating a green attitude within the university and the greater Monroe area. While working on it, I met a group of ambitious high school students, who shared the same concern about the environment as us. While talking, we decided that working together would benefit not only the organizations at our schools, but also the community as a whole. Is we let the community know we are serious, there is an even better chance that we will succeed and influence others.

If you are hesitant to volunteer or help out with an event in your community, my recommendation is to go ahead and do it. Even if it may be out of your comfort zone, it is important to put yourself out there. At the end of the day, you miss all of the shots you don’t take.

4.What surprised the author greatly?

A. Louisiana’s lack of environmental laws

B. Louisiana’s limited access to recycling

C. New Jersey’s legal requirement of recycling

D. New Jersey’s great advantage over Louisiana

5.The Green Club is intended to .

A. offer part-time jobs for high school students

B. appeal for an environmentally-friendly lifestyle

C. make university life in the Monroe area colorful

D. help with community events in the Monroe area

6.What did the high school students and the author agree on?

A. The need to co-operate

B. The importance of recycling

C. The possibility to succeed

D. The drawbacks of seriousness

7.The author suggests the potential volunteers .

A. praise themselves

B. force themselves

C. believe themselves

D. challenge themselves

C

Competition in the workplace can be a good thing for a number of different reasons. On the other hand, competition can also have some disadvantages, though. Some industries tend to be more competitive in the workplace than others. For instance, those in the sales field will typically be more competitive with co-workers than individuals in other fields, such as information technology. Nevertheless, a little competition in even the least competitive industries can be positive.

Competition in the workplace can create an environment where employees push each other to exceed their normal limits, which can result in increased production, both at an individual level and among the entire workforce as a whole. As individual production numbers increase, so do those of the entire team of workers who seek to outdo one another. Competition can be rewarded with bonuses or various types of rewards.

Workplace competition can also inspire a commitment to self-improvement. While financial motivations and bonuses are always a plus to get the competition going, those who see the bigger picture may take the competition as an opportunity to better themselves in the process of winning the competition. Self-improvement may include actions like changing work habits to be more organized, using visualization and goal setting to achieve goals and simply performing higher quality work.

Not all competition in the workplace necessarily has to take place at the individual level. Competition can bring about a sense of teamwork in the workplace when workers are placed in groups and asked to compete with one another, which can have a number of positive results that come from workers cooperating with each other. For example, workers can learn the value of communication and helping someone else, both of which have an influence on other areas of work like customer service.

8.What does the underlined word “exceed” in Paragraph 2 mean?

A. Life

B. Cancel

C. Break through

D. Set up

9.Which industry is likely to involve more workplace competition?

A. The sales field

B. Film Production

C. Customer service

D. Information technology

10.How can competition contribute to employees’ self-improvement?

A. It changes their lifestyles greatly

B. It assists them to achieve a higher goal

C. It improves their financial management

D. It offers them chances to change for the better

11.What is the best title for the text?

A. Benefits of Workplace Competition

B. Reasons for Joining in Competitions

C. Approaches to Winning Competition

D. Strengths and Weaknesses of Competition

D

Artificial intelligence, or AI, has slowly begun to influence higher education around the world. Now, one new AI tool could change the way university students evaluate their professor. The tool is called Hubert, a teacher evaluation tool that appears as an AI-powered chatbot. Instead of filling out a form, students use a chat window to give feedback(反馈) on the course and their professor. Afterwards, Hubert categorizes the students’ comments for the professor to review.

Hubert is free for educators to use. More than 600 teachers have used it already. The goal of the new Hubert program is to improve education by giving teachers detailed, organized feedback from students.

Viktor Nordmark, from Sweden, started the company in 2015, with several friends. Before creating Hubert, the founders asked teachers what would improve their teaching skills. The answer, Nordmark said, was qualitative(定性的) feedback from their students. In other words, teachers wanted students to write detailed answers to open-ended questions about their experiences in class.

Qualitative feedback is different from the survey responses, which students are often asked to provide at the end of a class. “This kind of data takes a lot of time for professors to collect and analyze,” Nordmark said. And for the stu dents, it can also be “really boring to fill out.” So Nordmark and his friends designed Hubert as a compromise between a traditional survey and a personal interview. “You can reach a really large crowd, but you can also get really qualitative data back,” Nordmark said.

Now, when Hubert receives comments from students, it compares them with the information already in its system to organize the data. Nordmark says that Hubert will continue to get smarter as it receives more comments in the future. Nordmark says he and his co-founders have plans to make Hubert more flexible and accurate. They hope to give teachers the possibility of selecting their own evaluation questions.

12.What can be inferred about traditional teacher evaluation?

A. Its data is easy to collect

B. Users are charged for using it

C. Students needn’t fill out forms

D. Students find it dull to take part in it

13.According to the text, qualitative feedback .

A. can improve the students’ performance at school

B. is students’ answers to teachers’ questions in class

C. can be obtained by asking students to fill out forms

D. is detailed responses to questions not for fixed answers

14.What is one of the advantages of Hubert at present?

A. Being able to change itself to become smarter

B. Saving much time when collecting survey forms

C. Taking on the strengths of a survey and an interview

D. Enabling teachers to select their own evaluation questions

15.What is the text mainly about?

A. The characteristics of qualitative feedback

B. A new AI-powered tool of teacher evaluation

C. The changes in the way teachers are evaluated

D. A potential revolution in the educational system

第二节(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Many students have trouble staying focused in class. Some of them easily become absent-minded or fall asleep. As a result, they turn to study drugs in order to stay focused in school. 16 .

●Get some sleep

17 . And it is important to stick with it. Having irregular sleep cycles can really affect concentration and physical well-being. Try to go to sleep at the same time every night and get eight to nine hours of sleep. Your body will thank you in the morning.

●18

Eating first thing in the morning provides fresh energy throughout the day, and it doesn’t even have to be a big meal. Something as small as a bowl of oatmeal can make students more energetic and efficient for the rest of the day. And foods like peanut butter, berries, and whole grains have even shown to improve memory.

●Turn off your phone

An obvious way to maintain concentration is to avoid distractions that take your attention away. 19 . When students need to channel their energy into studies, turning off the phone or even putting it on airplane mode is a good way to centralize their drive and keep distractions at bay.

●Break a sweat

Trying to concentrate in class will feel as challenging as a marathon if you’re not in good physical health. On the other hand, actually running a marathon may help boost your ability to concentrate, as exercise is shown to have many benefits for the brain. While you don’t necessarily have to run 26 miles before class or work, doing exercise in the morning can get your blood flowing toward your brain. 20 .

A. Do not skip breakfast

B. Sit in the front if you sleep in class

C. That helps in strengthening the mind

D. Probably the biggest one is the smart phone

E. Students should have a regular bedtime routine

F. But many study drugs have proven harmful to human health

G. However, there are other all-natural ways to help with concentration in class

第二部分语言知识运用(共两节,满分45分)

第一节(共20小题;每题1.5分,满分30分)

阅读下面短文,从短文后各题所给的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

I was out for my usual morning run and found myself in the late-summer heat, thirsty. If only I had taken a 21 bottle. After I stopped under a bridge to shelter myself from the sun for a moment of 22 , I saw two young, 23 men standing next to their sleeping bags. One smiled and gently 24 his hand as if he were about to say hello, but he didn’t say a word. He wasn’t asking for25 . I smiled and raised my hand, too.

As I started back on my 26 , I thought about how much we all 27 to connect with other people. At that moment, this homeless man seemed to want to connect with someone else 28 he wanted food or money.

We have all had 29 of feeling separate and lonely. I once felt lonely being in a relationship that 30 an emotional connection. Feeling separated doesn’t have anything to do with being alone, 31 is about the human desire to feel 32 by being seen and valued by another person.

We all 33 from connection. That homeless man affected my day. After meeting him, I felt more grateful and it made me 34 all that I have. He made me feel concerned for him. I had the choice to move toward 35 or connection. Separation is looking at the homeless person and focusing on how 36 he looks. Connection is understanding that he influenced my day by 37 to me. I can 38 times in my life when, like him, I was in a situation I had never expected. There have been times when I felt down, and times when I needed someone to 39 what he was doing and say hello to me.

Pay attention today and notice whether you tend to move toward separation or toward connection. If your tendency is to spend time alone, 40 saying “yes” to invitations. Practice moving toward rather than away from people.

21.A. wine B. water C. glass D. metal

22.A. peace B. joy C. shade D. breath

23.A. handsome B. homeless C. disabled D. tall

24.A. took B. dropped C. crossed D. raised

25.A. anything B. nothing C. everything D. all

26.A. wandering B. walking C. running D. hiking

27.A. need B. have C. try D. seek

28.A. other than B. less than C. rather than D. better than

29.A. expectations B. purposes C. experiences D. worries

30.A. lacked B. contained C. enjoyed D. valued

31.A. or B. and C. so D. but

32.A. amazed B. connected C. amused D.

entertained

33.A. benefit B. recover C. suffer D. come

34.A. lose B. question C. recognize D. appreciate

35.A. ignorance B. separation C. depression D. desperation

36.A. kind B. neat C. unhappy D. unclean

37.A. reaching out B. giving in C. turning D. replying

38.A. forget about B. keep up with C. reflect on D. return to

39.A. continue B. accomplish C. handle D. stop

40.A. keep B. practice C. deny D. imagine

非选择题

第二节(共10小题;每小题1.5分,满分15分)

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Swizerland is the world’s most famous watchmaker, 41 makes it little surprise that 42 (it) people are the most punctual in the world. For them, being on time is not only a nice thing to do, but it’s a strict 43 (believe) that they build almost every aspect of their lives on.

According to the BBC, everything in Swizerland, from trains and buses 44 personal meetings, is on time. If someone says they are meeting you at 3 pm, they 45 not be there at 2:55 or 3:05 - just 3 pm. It shows “a deep expression of respect for other people”, US writer Eric Weiner, who 46 (recent) traveled to Swizerland, wrote for BBC News. “A punctual person is a 47 (consider) one. By showing up on time for everything, a Swiss person is expressing he values your time and, by extension, he values you.”

This valuable quality of Swiss people 48 (report) to originate from the country’s mountain areas. Due to poor weather, people had to plant and harvest crops exactly on time, 49 they would have nothing to eat.

However, being punctual also has its problems. Since everybody has their lunch at exactly 12 and takes their coffee break at 4pm, elevators and coffee shops all tend 50 (be) full at the same time.

第三部分写作(共两节,满分35分)

第一节短文改错(共10小题;每小题1分,满分10分)

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文,文中共有10处错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

When I was 5 years old, I started my journey to the world of music. Playing the piano becomes a great source of joy. Now, study alone abroad, I have found other way to enjoy music-performing in my school band.

I remember the very first time when I played in a band. I practiced a lot. Still, when I sat at the piano, I felt scared and it seemed that I was getting small. My hands went cold when the conductor and other band member stared at me. The string of notes that came out the piano could not be calling a melody. However, that was only the beginning of your challenges.

In my opinion, even though the challenges are difficult for me to get through, but they make both me and the band even strong.

第二节书面表达(满分25分)

假定你是某国际学校的学生李华,你校即将开展“绿色校园”活动,现在向学生公开征集活动方案。请你向负责该活动的老师Smith先生写信,提出你的建议和想法。要点如下:

1.活动形式及内容;

2.注意事项;

3.其它。

注意:

1.词数100左右;

2.可以适当增加细节,以使行文连贯。

Dear Smith,

Yours,

Li Hua

云南省昆明第一中学2018届高三第八次月考

英语试卷参考答案

第一部分:阅读理解(40分)

第一节(30分): 1-5 CBABB 6-10 ADCAD 11-15 ADDCB

第二节(10分): 16-20 GEADC

第二部分:语言知识运用(45分)

第一节(30分): 21-25 BCBDA 26-30 CACCA 31-35 DBADB 36-40 DACDB

第二节(15分): 41. which 42. its 43. belief 44. to 45. will

46.recently 47. considerate 48. is reported 49. or/otherwise 50. to be

第三部分:写作(35分)

第一节: 短文改错(10分)

When I was 5 years old, I started my journey to the world of music. Playing the piano becomes a great source

became

of joy. Now, study alone abroad, I have found other way to enjoy music-performing in my school band.

studying another

I remember the very first time when I played in a band. I practiced a lot. Still, when I sat at the piano, I felt

the

scared and it seemed that I was getting small. My hands went cold when the conductor and other band member

members

stared at me. The string of notes that came out ∧ the piano could not be calling a melody. However, that was only

of called

the beginning of your challenges.

my

In my opinion, even though the challenges are difficult for me to get through, but they make both me and the

band even strong.

stronger

第二节: 书面表达(25分)

【参考范文】

Dear Smith,

I’m Li Hua, a senior student of this school. I’m writing to offer my proposal concerning the “Green Campus” activity to be carried out in our school.

In my humble opinion, to create a green campus, what we need to do is not only to plant more trees and flowers to beautify the environment, but also to create an energy-efficient and resource-cycled campus. Everyone on campus should be informed to form the habit of using resources properly and saving energy. It would be better to organize some speech contests or knowledge competitions related to environmental protection to arouse stude nts’ awareness of keeping the campus green, because it needs our joint efforts to realize this goal. And we can achieve it by doing pieces of small acts in daily life, such as turning off the light when leaving the classroom and take the initiative to pick up the waste paper on the ground.

I hope you will find these suggestions useful, and I would be ready to discuss further details with you if necessary.

Yours,

Li Hua

云南省昆明市第一中学2018届高三第五次月考语文试题Word版含答案

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班 . 6.在平行四边形ABCD中,∠A= 30°,AD =,BD = 4,则平行四边形ABCD的 面 积等于或8 . 二、选择题 (本大题共8小题,每小题4分,共32分,每小题正确的选项只有 一个) 7.下列图形既是轴对称图形,又是中心对称图形的是 ( B ) A. B. C. D. 8.2019年“五一“期间,某景点接待海内外游客共688000人次,688000这 个数用科学记数法表示为 ( C ) A. B. C. D. 9.一个十二边形的内角和等于 ( D ) A. 2160° B. 2080° C. 1980° D. 1800° 10.要使有意义,则x的取值范围为 ( B ) A. B. C. D. 11.一个圆锥的侧面展开图是半径为8的半圆,则该圆锥的全面积是 ( A ) A. 48π B. 45π C. 36π D. 32π

昆明市2018年中考数学试卷(解析版)

2018年云南省昆明市中考数学试卷 一、填空题(每小题3分,满分18分) 1.(3.00分)在实数﹣3,0,1中,最大的数是. 2.(3.00分)共享单车进入昆明市已两年,为市民的低碳出行带来了方便,据报道,昆明市共享单车投放量已达到240000辆,数字240000用科学记数法表示为. 3.(3.00分)如图,过直线AB上一点O作射线OC,∠BOC=29°18′,则∠AOC 的度数为. 4.(3.00分)若m+=3,则m2+=. 5.(3.00分)如图,点A的坐标为(4,2).将点A绕坐标原点O旋转90°后,再向左平移1个单位长度得到点A′,则过点A′的正比例函数的解析式为. 6.(3.00分)如图,正六边形ABCDEF的边长为1,以点A为圆心,AB的长为半径,作扇形ABF,则图中阴影部分的面积为(结果保留根号和π).

二、选择题(每小题4分,满分32分,在每小题给出的四个选项中,只有一项是正确的) 7.(4.00分)下列几何体的左视图为长方形的是() A. B.C.D. 8.(4.00分)关于x的一元二次方程x2﹣2x+m=0有两个不相等的实数根,则实数m的取值范围是() A.m<3 B.m>3 C.m≤3 D.m≥3 9.(4.00分)黄金分割数是一个很奇妙的数,大量应用于艺术、建筑和统计决策等方面,请你估算﹣1的值() A.在1.1和1.2之间B.在1.2和1.3之间 C.在1.3和1.4之间D.在1.4和1.5之间 10.(4.00分)下列判断正确的是() A.甲乙两组学生身高的平均数均为1.58,方差分别为S甲2=2.3,S乙2=1.8,则甲组学生的身高较整齐 B.为了了解某县七年级4000名学生的期中数学成绩,从中抽取100名学生的数学成绩进行调查,这个问题中样本容量为4000 C.在“童心向党,阳光下成长”合唱比赛中,30个参赛队的决赛成绩如下表: 则这30个参赛队决赛成绩的中位数是9.7 D.有13名同学出生于2003年,那么在这个问题中“至少有两名同学出生在同一个月”属于必然事件 11.(4.00分)在△AOC中,OB交AC于点D,量角器的摆放如图所示,则∠CDO 的度数为()

云南省昆明市2019届高三第三次统测文科综合地理试卷【附解析】

秘密★启用前 昆明市2019届高考模拟考试 文科综合能力测试 本试卷满分300分,考试用时150分钟。 注意事项: 1.答卷前,考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号填写在答题卡上,并认真核准条形码上的准考证号、姓名、考场号、座位号及科目,在规定的位置贴好条形码。 2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。如需改动,用橡皮擦干净后,再选涂其他答案标号。回答非选择题时,将答案写在答题卡上。写在本试卷上无效。3.考试结束后,将答题卡交回。 一、选择题:本卷共35小题。每小题4分,共140分。在每个小题给出的四个选项中,只有一项是符合题目要求的。 城市首位度是用于测量城市区域主导性的指标,下图所示首位度是某年我国各省会城市与该省最大非省会城市经济总量之比。 据此完成下面小题。 1. 关于图中省会城市首位度的描述,正确的是 A. 东部沿海省区普遍较低 B. 经济发达省区普遍较高 C. 矿产丰富省区普遍较高 D. 人口较少省区普遍较低 2. 成都城市首位度最高,说明四川省 A. 交通便利 B. 城市化水平较高 C. 经济发达 D. 区域发展不平衡 3. 杭州、广州、福州、南京所在省区,经济总量最大的城市分别可能为 A. 宁波、深圳、厦门、南京 B. 杭州、深圳、福州、苏州 C. 宁波、广州、福州、南京 D. 杭州、广州、厦门、苏州

【答案】1. A 2. D 3. D 【解析】 本题以我国省会城市首位度为背景,考查区域地理特征的差异性分析以及区域经济的发展特征。 【1题详解】 根据材料可知省会城市的首位度是某年该省省会城市与该省最大非省会城市经济总量之比,据图判断我国城市省会城市首位度东部沿海省区较低,中西部内陆地区省会城市首位度高,A 正确。经济发达省区由于省会城市与该省最大非省会城市间差异较小,首位度较低,B 错;矿产丰富的省区也有首位度较低的例如呼和浩特,沈阳等,C 错;人口较少的地区例如西藏的拉萨、新疆的乌鲁木齐首位度也较高,D 错,故选A 。 【2题详解】 根据概念省会城市的首位度是某年该省省会城市与该省最大非省会城市经济总量之比,比值越大说明两个城市间之间的经济差异越大,经济发展越不平衡,因此成都城市首位度最高,说明四川省区域经济发展不平衡,D 正确;交通便利、城市水平较高、经济发达会促进区域经济的发展,进而缩小城市首位度,A 、B 、C 错误,故选D 。 【3题详解】 根据材料分析省会城市首位度若大于1,说明该省经济总量最大的 位省会城市;若小于1,则省会城市并不是经济总量最大的省市;据图浙江省杭州市、广东省广州市的首位度大于1,则浙江省、广东省经济总量最大的城市为杭州市、广州市;而福建省福州市和江苏省南京市的首位度小于1,则福州、南京不是该两省经济总量最大的城市,而福建省经济最大量的城市可能为厦门,江苏省经济总量最大的可能为苏州市。A 、B 、C 错误,D 正确。 端砚是中国四大名砚之一,出产于广东肇庆市端溪,距今已有一千三百多年历史,其石质主要为泥质变质岩。其中,带有“石眼”的端砚尤为珍贵,“石眼”是一种特殊的火山尘泥结构。端砚易雕刻、蓄水不涸、发墨快。 据此完成下面小题。 4. 推测带有“石眼”的端砚原石形成的地质过程最可能是 A. 外力沉积一火山喷发一变质作用一地壳抬升 B. 火山喷发一变质作用一外力沉积一地壳抬升 C. 地壳抬升一外力沉积一火山喷发一变质作用 D. 变质作用一外力沉积一火山喷发一地壳抬升 5. 端砚能“蓄水不涸”的主要原因是

2020年云南省曲靖一中高考(理科)数学二模试卷 含解析

2020年高考(理科)数学二模试卷 一、选择题 1.已知集合A={x|y=lg(2﹣x)},集合B={x|≤2x≤4},则A∩B=()A.{x|x≥﹣2}B.{x|﹣2<x<2}C.{x|﹣2≤x<2}D.{x|x<2} 2.若复数(α∈R)是纯虚数,则复数2a+2i在复平面内对应的点在()A.第一象限B.第二象限C.第三象限D.第四象限 3.定义运算:,则函数f(x)=1?2x的图象是()A.B. C.D. 4.抛物线方程为y2=4x,一直线与抛物线交于A、B两点,其弦AB的中点坐标为(1,1),则直线的方程为() A.2x﹣y﹣1=0B.2x+y﹣1=0C.2x﹣y+1=0D.﹣2x﹣y﹣1=0 5.在明代程大位所著的《算法统宗》中有这样一首歌谣,“放牧人粗心大意,三畜偷偷吃苗青,苗主扣住牛马羊,要求赔偿五斗粮,三畜户主愿赔偿,牛马羊吃得异样.马吃了牛的一半,羊吃了马的一半.”请问各畜赔多少?它的大意是放牧人放牧时粗心大意,牛、马、羊偷吃青苗,青苗主人扣住牛、马、羊向其主人要求赔偿五斗粮食(1斗=10升),三畜的主人同意赔偿,但牛、马、羊吃的青苗量各不相同.马吃的青苗是牛的一半,羊吃的青苗是马的一半.问羊、马、牛的主人应该分别向青苗主人赔偿多少升粮食? () A.,,B.,, C.,,D.,,

6.若p是¬q的充分不必要条件,则¬p是q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 7.阅读程序框图,为使输出的数据为31,则①处应填的数字为() A.4B.5C.6D.7 8.已知x,y满足,则的取值范围为() A.[,4]B.(1,2] C.(﹣∞,0]∪[2,+∞)D.(﹣∞,1)∪[2,+∞) 9.已知点A(﹣3,0),B(0,3),若点P在曲线上运动,则△PAB面积的最小值为() A.6B.C.3D. 10.已知双曲线Γ:﹣=1(a>0,b>0)的右焦点为F,过原点的直线l与双曲线Γ的左、右两支分别交于A,B两点,延长BF交右支于C点,若AF⊥FB,|CF|=3|FB|,则双曲线Γ的离心率是() A.B.C.D. 11.已知的值域为[m,+∞),当正数a,b满足时,则7a+4b的最小值为() A.B.5C.D.9

2019年云南省昆明市初中学业水平考试数学试卷(含答案)

云南省昆明市 2013 年中考数学试卷 一、选择题(每小题 3 分,满分 24 分,在每小题给出的四个选项中,只有一项是正确的。 ) 1.(3 分)( 2013?云南)﹣ 6 的绝对值是 ( ) A . ﹣6 B . 6 C . ±6 D . 考点 :简单几何体的三视图. 分析: 根据左视图是从图形的左面看到的图形求解即可. 解答: 解:从左面看,是一个等腰三角形. 故选 A . 点评:本题考查了三视图的知识,左视图是从物体的左面看得到的视图. 3.(3 分)( 2013?昆明)下列运算正确的是( ) A . 623 x +x =x B . C . 2 2 2 ( x+2y ) =x +2xy+4y D . 考点 :完全平方公式;立方根;合并同类项;二次根式的加减法 分析:A 、本选项不能合并,错误; B 、利用立方根的定义化简得到结果,即可做出判断; C 、利用完全平方公式展开得到结果,即可做出判断; D 、利用二次根式的化简公式化简,合并得到结果,即可做出判断. 解答:解:A 、本选项不能合 并,错误; 考点 :绝对值. 专题 : 计算题. 分析:根据绝对值的性质,当 a 是负有理数时, a 的绝对值是它的相反数﹣ a ,解答即可; 解答: | 解:根据绝对值的性质, ﹣6|=6. 故选 B . 点评: 本题考查了绝对值的性质,熟记:一个正数的绝对值是它本身;一个负数的绝对值是 它 的相反数; 0 的绝对值是 0. ) 面几何体的左视图是 ( C .

B、=﹣2,本选项错误; C、(x+2y )2=x 2+4xy+4y 2,本选项错误; D、﹣=3 ﹣2 = ,本选项正确.故选D 点评:此题考查了完全平方公式,合并同类项, 以及负指数幂,幂的乘方,熟练掌握公式及法则是解本题的关键. 4.(3分)(2013?昆明)如图,在△ABC 中,点D,E 分别是AB,AC 的中点,∠ A=50 °,∠ ADE=60 ∠C 的度数为() 考点:三角形中位线定理;平行线的性质;三角形内角和定理. 分析:在△ADE 中利用内角和定理求出∠ AED ,然后判断DE∥BC,利用平行线的性质可得出∠ C. 解答:解:由题意得,∠ AED=180 °﹣∠ A ﹣∠ ADE=70 °, ∵点D,E分别是AB,AC 的中点, ∴ DE 是△ABC 的中位线, ∴DE∥BC, ∴∠ C=∠ AED=70 °. 故选C.点评:本题考查了三角形的中位线定理,解答本题的关键是掌握三角形中位线定理的内容:三角形的中位线平行于第三边,并且等于第三边的一半. 5.(3 分)(2013?昆明)为了了解2013年昆明市九年级学生学业水平考试的数学成绩,从中随机抽取了 名学生的数学成绩.下列说法正确的是() A .2013 年昆明市九年级学生是总体 B.每一名九年级学生是个体 1000 名九年级学生是总体的一个样本 样本容量是1000 考点:总体、个体、样本、样本容量. 分析:根据总体、个体、样本、样本容量的概念结合选项选出正确答案即可. 解答:解:A、2013 年昆明市九年级学生的数学成绩是总体,原说法错误,故本选项错误; B、每一名九年级学生的数学成绩是个体,原说法错误,故本选项错误; C、1000 名九年级学生的数学成绩是总体的一个样本,原说法错误,故本选项错误; D、样本容量是1000,该说法正确,故本选项正确. 故选D .,则 B.60°C.70°D.80° 1000 C. D.

2020届云南省曲靖一中高考数学理科二模试题和答案详细解析

2020届云南省曲靖一中高考数学理科二模试题 一、选择题 1.已知集合A={x|y=lg(2﹣x)},集合B={x|≤2x≤4},则A∩B=()A.{x|x≥﹣2} B.{x|﹣2<x<2} C.{x|﹣2≤x<2} D.{x|x<2} 2.若复数(α∈R)是纯虚数,则复数2a+2i在复平面内对应的点在()A.第一象限B.第二象限C.第三象限D.第四象限 3.定义运算:,则函数f(x)=1?2x的图象是()A.B. C.D. 4.抛物线方程为y2=4x,一直线与抛物线交于A、B两点,其弦AB的中点坐标为(1,1),则直线的方程为() A.2x﹣y﹣1=0 B.2x+y﹣1=0 C.2x﹣y+1=0 D.﹣2x﹣y﹣1=0 5.在明代程大位所著的《算法统宗》中有这样一首歌谣,“放牧人粗心大意,三畜偷偷吃苗青,苗主扣住牛马羊,要求赔偿五斗粮,三畜户主愿赔偿,牛马羊吃得异样.马吃了牛的一半,羊吃了马的一半.”请问各畜赔多少?它的大意是放牧人放牧时粗心大意,牛、马、羊偷吃青苗,青苗主人扣住牛、马、羊向其主人要求赔偿五斗粮食(1斗=10升),三畜的主人同意赔偿,但牛、马、羊吃的青苗量各不相同.马吃的青苗是牛的一半,羊吃的青苗是马的一半.问羊、马、牛的主人应该分别向青苗主人赔偿多少升粮食? () A.,,B.,, C.,,D.,,

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云南省曲靖一中2015届高三下学期第二次月考物理试卷.doc

云南省曲靖一中2015届高三下学期第二次月考物理试卷

云南省曲靖一中2015届高三下学期第二次月考物理试卷 一、选择题(本题共10题,每题4分,1-6题为单选,7-10题多选,多选题全部选对的4分,选对但不全的得2分,有错选或不选的得0分.)1.(4分)汽车A在红绿灯前停住,绿灯亮起时起动,以0.4m/s2的加速度做匀加速运动,经过30s后以该时刻的速度做匀速直线运动.设在绿灯亮的同时,汽车B以8m/s的速度从A车旁边驶过,且一直以相同的速度做匀速直线运动,运动方向与A车相同,则从绿灯亮时开始()A. A车在加速过程中与B车相遇 B.A、B相遇时速度相同 C.相遇时A车做匀速运动 D.两车可能再次相遇 2.(4分)如图所示,A、B两小球分别连在轻线两端,B球另一端与弹簧相连,弹簧固定在倾角为30°的光滑斜面顶端.A、B两小球的质量分别为m A、m B,重力加速度为g,若不计弹簧

质量,在线被剪断瞬间,A、B两球的加速度大小分别为() A.都等于B.和0 C.和D.和 3.(4分)半圆柱体P放在粗糙的水平面上,有一挡板MN,延长线总是过半圆柱体的轴心O,但挡板与半圆柱不接触,在P和MN之间放有一个光滑均匀的小圆柱体Q,整个装置处于静止状态,如图是这个装置的截面图,若用外力使MN绕O点缓慢地顺时针转动,在MN到达水平位置前,发现P始终保持静止,在此过程中,下列说法中正确的是() A.MN对Q的弹力逐渐增大B.MN对Q的弹力先增大后减小

C.P、Q间的弹力先减小后增大D.Q所受的合力逐渐增大 4.(4分)一辆汽车以恒定功率P1在平直公路上匀速行驶,若驾驶员突然减小油门,使汽车的功率突然减小为P2并继续行驶,若整个过程中阻力不变,则汽车发动机的牵引力将() A.保持不变 B.不断减小 C.先增大,再减小,后保持不变D.先减小,再增大,后保持不变 5.(4分)一个带正电的金属球半径为R,以球心为原点建立坐标系,设无穷远处电势为零.你可能不知道带电金属球所产生的电场中电势φ随x变化的规律,但是根据学过的知识你可以确定其φ﹣x图象可能是()

2020届云南省曲靖一中高考数学理科二模试题答案

2020届云南省曲靖一中高考数学理科二模试题答案 一、选择题(共12小题,每小题5分,共60分,在每小题的四个选项中,只有一项符合要求.) 1.已知集合A={x|y=lg(2﹣x)},集合B={x|≤2x≤4},则A∩B=()A.{x|x≥﹣2}B.{x|﹣2<x<2}C.{x|﹣2≤x<2}D.{x|x<2} 【分析】求出集合的等价条件,利用交集的定义进行求解即可. 解:∵A={x|x<2},B={x|﹣2≤x≤2}, ∴A∩B={x|﹣2≤x<2}, 故选:C. 2.若复数(α∈R)是纯虚数,则复数2a+2i在复平面内对应的点在()A.第一象限B.第二象限C.第三象限D.第四象限 【分析】化简复数,根据纯虚数的定义求出a的值,写出复数2a+2i对应复平面内点的坐标,即可得出结论. 解:复数==(a+1)+(﹣a+1)i, 该复数是纯虚数,∴a+1=0,解得a=﹣1; 所以复数2a+2i=﹣2+2i, 它在复平面内对应的点是(﹣2,2), 它在第二象限. 故选:B. 3.定义运算:,则函数f(x)=1?2x的图象是()A.B.

C.D. 【分析】本题需要明了新定义运算a?b的意义,即取两数中的最小值运算.之后对函数f(x)=1?2x就可以利用这种运算得到解析式再来求画图解. 解:由已知新运算a?b的意义就是取得a,b中的最小值,因此函数f(x)=1?2x=,因此选项A中的图象符合要求. 故选:A. 4.抛物线方程为y2=4x,一直线与抛物线交于A、B两点,其弦AB的中点坐标为(1,1),则直线的方程为() A.2x﹣y﹣1=0B.2x+y﹣1=0C.2x﹣y+1=0D.﹣2x﹣y﹣1=0【分析】设A(x1,y1),B(x2,y2),利用点差法得到,所以直线AB 的斜率为2,又过点(1,1),再利用点斜式即可得到直线AB的方程. 解:设A(x1,y1),B(x2,y2),∴y1+y2=2, 又,两式相减得:, ∴(y1+y2)(y1﹣y2)=4(x1﹣x2), ∴, ∴直线AB的斜率为2,又∴过点(1,1), ∴直线AB的方程为:y﹣1=2(x﹣1),即2x﹣y﹣1=0, 故选:A. 5.在明代程大位所著的《算法统宗》中有这样一首歌谣,“放牧人粗心大意,三畜偷偷吃苗青,苗主扣住牛马羊,要求赔偿五斗粮,三畜户主愿赔偿,牛马羊吃得异样.马吃了牛的一半,羊吃了马的一半.”请问各畜赔多少?它的大意是放牧人放牧时粗心大意,牛、马、羊偷吃青苗,青苗主人扣住牛、马、羊向其主人要求赔偿五斗粮食(1斗=10升),三畜的主人同意赔偿,但牛、马、羊吃的青苗量各不相同.马吃的青苗是牛的一

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