2020届山东省威海市中考英语模拟试题(有答案)(Word版)(已纠错)

2020届山东省威海市中考英语模拟试题(有答案)(Word版)(已纠错)
2020届山东省威海市中考英语模拟试题(有答案)(Word版)(已纠错)

绝密★启用前试卷类型:A

山东省威海市中考英语试题

注意事项:

1.本试卷共8页,共80分,考试时间90分钟,考试结束后,将本试卷和答题卡一并交回。

2.答题前,考生务必用0.5毫米黑色签字笔将自己的姓名、考生号、座号填写在答题卡和试卷规定的位置上。

3.需要涂卡的小题,选出答案后,用2B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,答案涂在试卷上无效。

4.非选择题必须用0.5毫米黑色签字笔作答,答案必须写在答题卡指定区域内相应的位置,写在试卷上的答案无效;如需改动,先划掉原来的答案,然后再写上新的答案;不能使用涂改液、胶带纸、修正带,不按以上要求作答的答案无效。

一、阅读理解(共五篇短文,共25小题,计30分。其中1-20每小题1分;21-25每小题2分)

阅读A、B篇。从文后每小题A、B、C选项中选择最佳答案。请将答案编号涂卡。

A

One day Vimala and her new friend. Mary, were playing at school. Mary was a very quiet and shy girl but Vimala liked her. While jumping, Mary’s glasses fell off and broke. Just then the bell rang and they had to hurry to their science class.

“Oh dear, I'm going to be as blind as a bat. But we'd better hurry. It's Miss Lee's class, "said Maray.

At the start of the lesson, Miss Lee explained how to do the experiment to produce large eye crystals. Then she started to question the class. Nobody dared to give a wrong answer because Miss Lee was a very strict teacher Miss Lee held up a clamp(夹具) and said, "What do we use is for? What do we call it? All the girls looked down, while she looked at their heads for one to pick on. "Mary?" she finally asked.

Mary was sitting at the back of the class. She stood up and peered at Miss Lee, but she could not see clearly what the teacher was holding. She was nervous a bit and did not answer.

Miss Lee repeated her question. This time she spoke more slowly and there was anger in her voice.

"What is this used for ?" she asked

Vimala saw storm clouds climbing up to Miss Lee's face. She knew that the storm was about to burst on Mary, so she put up her hand. Miss Lee paid no attention to her and stared through narrowed eyes at Mary, waiting for an answer.

Mary did not know what to say. She looked to her left and right for help. Too seared to say out that she couldn’t see clearly, Mary hoped that if she kept quiet Miss Lee would ask somebody else.

Vimala guessed what was wrong, so she decided to take a risk. She jumped to her feet and said, "Excuse me. Miss Lee. Mary broke her glasses just before the lesson started. I don't think she can see the clamp clearly. "Then she sat down, praying (祈祷)that the ceiling would not fall on her.

“Oh!” Miss Lee said, a little surprised. She had thought that Mary was refusing to answer.

Now that she understood, her anger faded away. “Thank you, Vimala.” she said Then she turned

to Mary and said, “Come and look at this.”

Mary left her chair and went to the front of the class.

“It’s a clamp.” she said. "We can put it on a metal stand(支架) and use it to hold things in place.”

"Well, you got it right at last. "Miss Lee said with a brief smile. But you'd better not do any experiments until your glasses have been repaired. You can watch Vimala while the does the experiment.

The storm clouds disappeared. The smile disappeared from Miss Lee's face and she continued with the lesson. Vimala winked at Mary who peered at her and smiled weakly.

1. What's the matter with Mary’s glasses?

A. They were lost.

B. They were broken

C. They were left s home

2. Miss Lee was __________ teacher.

A. an English B a science C. a math

3. Why couldn't Mary answer Miss Lee's question?

A. Because she didn't know the answer

B. Because she couldn't hear what Miss Lee was saying

C. Because she couldn’t see what the teacher was holding

4. The sentence "Vimala saw storm clouds climbing up to Miss Lee's face.” means Vimala found_______

A. the sky was cloudy

B. a heavy storm was coming

C. Miss Lee was becoming angry

5. Which of the following is not right?

A. Mary was quiet and shy and also as blind as a bat

B. Miss Lee was a strict and serious teacher

C. Mary knew what a clamp was used for

B

Amanda Kitts is one of “tomorrow’s people”people who have artificial (人工的) body pats. She has a bionic(电子操控的)arm.

Now, Kitts nuns a day -care center. Children nun up to her

happily as she comes into the classroom. She bends over to talk with a

small girl. As she bends Kitts puts her hands on her knees. For most people,

this would be easy. However, just a few years

ago, this was impossible for Kitts.

In 2006, Kitts was in a car accident. A truck crushed(挤坏) her left arm

and the doctor had to

cut it off. "I was angry, said, depressed. I just couldn't accept it, she says.

But then she heard about a new technique that could use the remaining

nerves(神经) in her shoulder to contort an artificial arm.

In a difficult operation, a doctor novel Kitts's nerves to different mens of her upper- arm muscles. For months, the nerves grew. Millimeter by millimeter, they moved deeper into their new homes. “At three months I started feeling little tingles and twitches(刺痛和抽搐),”she said. A month later, she got her first bionic arm. A research engineer worked with Kitts to make the computer programs match her real movements more and more closely. Today, Kitts's arm is great, but it's not yet perfect. She wants feeling in her hands. For example, she needs to feel whether something is rough or smooth. She also needs feeling to do one of her favorite things-drink coffee "The problem with a paper coffee cup is that my hand will close until it gets a solid grip,” she says. One time at a coffee shop, her hand kept closing until it crushed the cup. But Kitts says positively, "One day I'll be able to feel things

with it, and clap my hands… to the songs my kids are singing”

6. What is the difference between Kitts and normal people?

A. She has a bionic arm.

B. She can bend

C. She can put her hands on her knees

7. Kitts got her first bionic arm _____________after the difficult operation.

A almost three months

B over one month C. more than four months

8. Kitts is able to ____________with her bionic hand.

A. clap her hands

B. hold thing

C. feel rough or smooth things

9. Kitts's attitude toward her new arm is______________.

A. positive

B. Angry

C. perfect

10. Choose the right order of the events

①Kitts heard about a new technique

②Kitts crushed a paper coffee cup

③Kitts had two human arms

④A truck hit Kitts's car

⑤Kitts got her first bionic arm

⑥Doctors moved some of the nerves in Kitts’s arm

A.④①⑥⑤②③

B.③④⑤①②⑥

C.③④①⑥⑤②

C

阅读C篇,判断正(A)误(B)。请将答案编号涂卡。A表示正确,B表示错误。

Bangladesh (孟加拉)is an agricultural country between India and Burma. Storms from the

Indian Ocean sweep across the country every year, and large areas of farming land are flooded(冲毁). The people are very poor.

Fewer than half of the country’s children complete their primary education. When they are six or seven years old, many children leave school to work in the fields or at home. The rest of their "education" consists of looking after cattle, collecting firewood or doing household jobs.

Not long ago, an experimental school was opened near the capital, Dacca, to help poor children. There are only 120 children in the school, which has three classrooms. In each class, forty pupils are divided into four groups of ten. Each pupil is free to decide which group he or she wants to join.

The most able pupils do a great deal of the teaching. They act as group monitors. Their duty is to ensure that all pupils in their group understand and practice what the teacher has taught.

There are a number of unusual features in the Bangladesh school. Children do not move up a class automatically when they grow older. Each group is promoted (升级)only when EVERY pupil in it has succeeded in getting to the right standard. As a result, all members of a group work hard to help the less able pupils. Nobody is left behind.

Lessons are extremely practical and include work on farming, carpentry, health and running a home, as well as lessons on the basic skills of reading, writing and arithmetic. At school, pupils prepare for adult life by learning to carry out almost all the tasks which they will face when they grow older.

If pupils have to look after cattle or young children, they are allowed to bring them to school. If a child has to stay at home to help his parents, there is no scolding or punishment (责罚) at school. Children enjoy their lessons and the school is cheap to run. It is so successful that other schools in Bangladesh are beginning to imitate (模仿)

its methods. Visitors are even coming from other agricultural countries to see if they can use a similar method.

11. Many people in Bangladesh work on farms

12. Most children in Bangladesh complete their primary education

13. In each group, the biggest or oldest pupil is made a monitor.

14. At the end of each school year, all the pupils move to a higher class

15. At school, pupils learn to do almost all the tasks needed in adult life

D

阅读D篇,根据短文内容,将下面方框中的句子还原到文章当中,使短文内容完整。

请将答案编号涂卡。

Complain(抱怨) Politely

Not everything goes the way you want it to. You may go to a restaurant and order a nice meal. But your order is wrong or not cooked properly. You may buy a product that breaks the next day.

However, if you speak angrily to people, they will become defensive(自卫的). Then they are less likely to help you.

A more effective (有效的)way to get what you want is to stay calm.

Use polite language and a friendly tone of voice. Start with phrases such as, " I'm sorry to bother you, but. "or" Excuse me, but could you.?" For example, "I'm sorry to bother you, but I ordered potato soup, not vegetable, "Phrasing your complaint as a question also helps. 17._______Could you help me? I just bought this phone case yesterday, but it's cracked.”

18. __________There is no faster way to make someone defensive than by blaming them. Use

the phrase.“ I know this isn't your fault, but…”or“There has been a misunderstanding.” 19.______Blaming people isn’t as important as getting a problem fixed!

There are honest mistakes, but at times someone may try to take advantage of you. In that case, don’t say "Hey! You're trying to cheat me! "Instead, use the phrase, "I understood that.." For example. "I understood that the service charge was included in the price. Then give the person a chance to answer.

If you don't get what you want with polite conversation ask to speak to a manager or supervisor.

20.___________.

A. When trying to comet a problem, don’t blame (责备)the person you re talking to.

B. People like to be asked rather than told!

C. But usually, you'll find that polite words and a smile will resolve a situation.

D. These kinds of experiences make you want to complain.

E. These phrases let people know you are only angry at the situation

E

研读E篇文字和图表,根据情境及问题简要作答。请将答案填写到答题卡指定位置。

Sara wants to buy a motorcycle. She sees an ad in the newspaper for a used one. She calls the

telephone number in the ad. The person who is selling the motorcycle lives on Flag Street in Clifton, about 15 miles from Fairview where Sara lives. She'll take a bus to get there on Sunday.

At the bus station. Sara looks through the bus schedules(时刻表). She sees one that says “Fairview, Clifton" on the front. That’s what Sara needs.

Please look at the bus schedule carefully. Then help Sara make her decision, and answer the following

questions.

21. Why docs Sara want to go to Flag Street?

22. What bus can Sara take according to the schedule?

23. Sara decides to arrive at Flag Street before 12: 00 by the No. 7 bus. What time should the bus leave Fairview Station?

24. When Sara gets on the No. 7 bus, she finds that Flag Street stop has been closed because of the street repairs. She has to get off at another stop, Look at the schedule again, where should Sara get off the bus so that she can have a shorter walk to Flag Street?

25. Now Sara is on Flag Street. She wants to visit a friend on her returning trip. Her friend is

around the comer of Church and North Street. Which is the proper bus for her to take and where

to get on the bus?

二、单词拼写(共8小题,计8分)

根据句意和音标提示以适当形式填写单词。请将答案填写在答题卡指定位置。

26. I looked into the classroom but I found it______________/’empti/

27. Tina is a_________ /’spe??l/ friend of mine.

28. Most of the teenagers admire_____________/’h????z/

29. The _____________/’si: kr?t/ of his success was hard work.

30. I ___________/n?kt/ at the door, but there was no answer.

31. She was seriously ill, but now she is out of_____________/’dein d???/

32. The boy__________/θru:/ a stone at a bird but missed it.

33. They tried hard to provide a beautiful_________/in’v a?r?nm?nt/ for the children.

三、动词填空(共8小题,计8分)

用括号里所给动词的适当形式填空。请将答案填写在答题卡指定位置。

Drawing might help you think

When you're sitting in class, have you ever drawn pictures in the margins of your notebooks?

If so, your teacher might have told you 34._________(stop). Many people think of doodling(涂鸦) as a distraction(精神涣散) from more important things. But it might be just the opposite.

One study shows that doodling may help you remember things you hear. In 2009 researchers asked two groups of people to listen to a phone message. One group 35_________(encourage) to doodle, but the other was not. Neither group knew that it would be asked to remember information from the message. But the group that doodled remembered 29 percent more.

Other people 36.______________(suggest)other uses for drawing. Jesse Prinz, a professor who studies doodling, says it can help you think creatively. Walking away from a problem to draw

might actually help you solve it. When you come back, you 37.________(have)a fresh perspective and figure out an answer more quickly.

Two years ago, an author named Sunni Brown 38.____________(write)a book on doodling. She argues that doodling is a tool that can help people think. She admits that people see doodling

as doing nothing, but she wants to change that. In fact, she runs a business that helps companies

improve organization and planning through doodling. Brown 39.______(believe)doodling is helpful because it incorporates(整合)many ways of learning. You lean in four ways: seeing, hearing, reading or writing, and through movement. The more ways you use, the better you learn.

And when you doodle while you 40_____(listen )to a lecture, you use all four.

You might think that being good at 41_________( draw)is important for doodling. But if the point of doodling is to help you think, then it doesn't matter what the picture looks like. Even if you're not an artist, doodling can help you. So next time you need help focusing, pick up a pen and doodle away!

四、完成句子(共6小题,计12分)

根据所给汉语句子完成英语句子,词数不限。请将答案填写在答题卡指定位置。

42.新加坡( Singapore)年有几个季节?

43.这些花儿多长时间浇一次?

44.足球比网球更普及,但网球是我的最爱。

45.Mike,别忘了告诉我咱们在哪里碰面。

46.如果我们想要在10点钟到达,我认为没有必要这么早出发。

47.Tom上个月向我借了一本词典,但是到现在还没归还。

五、短文填空(共10小题,计10分)请将答案编号涂卡。

根据短文内容,选择适当的单词或短语填空,使短文意思完整。每个选项仅使用一次。

A. ride to the gym

B. because

C. keeping fit

D. so

E. cheer me up

F. enjoy my day off

G. healthier

H. also

I. funny

J. coughing and sneezing

How’s it going? Sorry I haven't been i n touch for a while, but couldn’t use my computer for a few days. You’ll never guess what happened to me!

A couple of weeks ago, I decided to take up yoga. Yoga is a combination of physical and breathing exercises. It's supposed to be good for relaxation and 48________. I've been feeling a

bit stressed about my school work recently and I thought yoga might help.

My dad couldn't give me a lift to the first lesson, so

I decided to 49._______. The lesson was great and I felt really

Relaxed afterwards. On the way home, though, it started raining

and I got very wet! The next day, I woke up with a bad cold. I

couldn't stop 50_______.

I couldn't go to school 51._______I also had a high temperature.

We were having a math test that day so it was great that I c ould stay at home. I didn’t really 52__________, though.

I felt awful and stayed in bed. Mum brought me cups of hot tea for my sore throat(and you know how much I hate tea! ). She 53__________went to the chemist's and got me some vitamin pills. I have to keep taking these for a while 54.______I can get stronger.

That afternoon Robbie came to visit me. He said he'd got something to 55._________pretended it was the math test that I'd missed "Mr Bank says you can do it at home instead,” he said, b ut I knew he was joking. I didn’t think it was very 56.________, but he did!

The next day, I was still a bit pale and didn’t have much energy, but I was feeling better. The day after that, I was able to go back to school.

Can you believe my luck? I went to the yoga class to feel 57._______and instead I caught a cold!

Anyway, I hope you're OK. Write and let me know what you’ve been up to!

Bye for now!

六、书面表达(共1小题,计12分)请将答案填写在答题卡指定位置。

58. “照镜子”是生活中的平常事,以生活为镜,可以照出现实中真实的自己。请以“Me

in the mirror”为题,写一篇80词以上的英语短文。围绕自己最突出的一至两个优点和缺点,

重点谈谈在未来的生活和学习中如何扬长避短、完善自我,成长为更好的自己。

要求:1.题目已给出,不计入总词数;

2.观点正确、条理清晰、表达流畅;

3.文中不得出现自己的真实姓名和学校名称。

山东省威海市中考英语试题

参考答案

一、阅读理解(共五篇短文,25小题,计30分。)

(1-20小题,每小题1分)

1--5 BBCCA 6-10 ACBAC 11-15 ABBBA 16--20 DBAEC

(21-25小题,每小题2分)

21. Because she wants to buy a(second hand/ used)motorcycle

Because she wants to sec/meet the motorcycle seller.(此答案得1分,)

22. No 6(bus)and No. 7(bus)/No. 6(bus) or No. 7(bus)

(只答其中某路车得1分;缺少No扣0.5分。)

23.At10:27./At10:27am/A.M.

24. At Branch Ranch(Station ). /At Branch(Street). /At Ranch(Street)

25. To take the No. 6bus and get on the bus at North & Ranch Station/

The No 6 bus, and at North &Ranch Station

(答对一问得1分,第二问分别答North Street( Station)或Ranch street( Station)都可得1分)

二、单词拼写(共8小题,计8分,每小题1分。)

26. empty 27 special 28. heroes 29. secret

30 knocked 31 danger 32 threw 33. environment

三、动词填空(共8小题,计8分,每小题1分。)

34.to stop 35. was encouraged 36 have suggested 37. will have

38 wrote 39 believes 40 are listening 41. drawing

四、完成句子(共6小题,计12分。每小题2分,)

考生要能准确运用适当的句式、恰当的时态、语态以及正确的单词和短语来完成句子。时态、词序、句子结构错误分别扣1分,其他语法错误每处扣0.5分,个别单词拼写错误

不扣分。

42. How many seasons are there in Singapore in a year?

43. How often are the/these flowers watered?

How often do the flowers need watering/need to be watered?

How often will the flowers be watered?

44. Football is more popular than tennis, but tennis is my favorite(sport)./

Football is more popular than tennis, but I like tennis best.

45. Mike, don’t forget to tell me where to meet.

Mike, don’t forget to tell me where we’ll meet.

46. I don’t think it necessary to start/set out/ set off so early if we want to arrive at ten.

If we want arrive at ten. I don't think it's necessary start /set out/ set off so early.

I don’t think it’s necessary to start/set out/ set off so early if we want to arrive at ten.

If we want to arrive at ten, I don’t think it’s necessary to start/set out set off so early.

否定位置错误扣1分。

47. Tom borrowed a dictionary from me last month, but he hasn’t retu rned it(to me)so far/by now. /but he hasn't given it back( to me)so far/by now.

五、短文填空(共10小题,计10分。每小题1分。)

48.C 49.A 50.J 51.B 52.F 53.H 54.D 55.E 56.I 57.G

六、书面表达(共1小题,计12分)

58.参考例文

Me in the mirror

Looking at myself in the mirror, I know I am an outgoing girl. I like to make friends and I'm always ready to help them. So I'm very popular in my school. But I have a big problem, I'm less interested in my lessons and I can t concentrate in class. In my spare time I spend too much time on computer games, so I don' t get good grades which make my parents disappointed.

When I go to senior high school I hope to get along well with my classmates and try to make more friends. I hope we can help each other and learn from each other. I will make a good study resolution and try my best to go for it. I decide to have a healthier lifestyle. I'll spend more time on my schoolwork and develop good learning habits. I will concentrate more in class and finish my study tasks carefully. What's more, I will read more books and master good leaning methods. I hope to make great progress and make my parents proud of me.

中考数学压轴题解题方法大全及技巧

专业资料整理分享 中考数学压轴题解题技巧 湖北竹溪城关中学明道银 解中考数学压轴题秘诀(一) 数学综合题关键是第24题和25题,我们不妨把它分为函数型综合题和几何型综合题。 (一)函数型综合题:是先给定直角坐标系和几何图形,求(已知)函数的解析式(即在求解前已知函数的类型),然后进行图形的研究,求点的坐标或研究图形的某些性质。初中已知函数有:①一次函数(包括正比例函数)和常值函数,它们所对应的图像是直线;②反比例函数,它所对应的图像是双曲线; ③二次函数,它所对应的图像是抛物线。求已知函数的解析式主要方法是待定系数法,关键是求点的坐标,而求点的坐标基本方法是几何法(图形法)和代数法(解析法)。此类题基本在第24题,满分12分,基本分2-3小题来呈现。 (二)几何型综合题:是先给定几何图形,根据已知条件进行计算,然后有动点(或动线段)运动,对应产生线段、面积等的变化,求对应的(未知)函数的解析式(即在没有求出之前不知道函数解析式的形式是什么)和求函数的定义域,最后根据所求的函数关系进行探索研究,一般有:在什么条件下图形是等腰三角形、直角三角形、四边形是菱形、梯形等或探索两个三角形满足什么条件相似等或探究线段之间的位置关系等或探索面积之间满足一定关系求x的值等和直线(圆)与圆的相切时求自变量的值等。求未知函数解析式的关键是

列出包含自变量和因变量之间的等量关系(即列出含有x、y的方程),变形写成y=f(x)的形式。一般有直接法(直接列出含有x和y的方程)和复合法(列出含有x和y和第三个变量的方程,然后求出第三个变量和x之间的函数关系式,代入消去第三个变量,得到y=f(x)的形式),当然还有参数法,这个已超出初中数学教学要求。找等量关系的途径在初中主要有利用勾股定理、平行线截得比例线段、三角形相似、面积相等方法。求定义域主要是寻找图形的特殊位置(极限位置)和根据解析式求解。而最后的探索问题千变万化,但少不了对图形的分析和研究,用几何和代数的方法求出x的值。几何型综合题基本在第25题做为压轴题出现,满分14分,一般分三小题呈现。 在解数学综合题时我们要做到:数形结合记心头,大题小作来转化,潜在条件不能忘,化动为静多画图,分类讨论要严密,方程函数是工具,计算推理要严谨,创新品质得提高。 解中考数学压轴题秘诀(二) 具有选拔功能的中考压轴题是为考察考生综合运用知识的能力而设计的题目,其特点是知识点多,覆盖面广,条件隐蔽,关系复杂,思路难觅,解法灵活。解数学压轴题,一要树立必胜的信心,二要具备扎实的基础知识和熟练的基本技能,三要掌握常用的解题策略。现介绍几种常用的解题策略,供初三同学参考。 1、以坐标系为桥梁,运用数形结合思想:

(完整版)五年中考三年模拟英语试题及答案.docx

五年中考三年模拟英语试题及答案 一、听力部分( 20 分) (一)听句子,选择适当的答案( 5 分) 1.A. Not at all. B. No, it isn ’t. C. Thank you. 2.A. You’re welcome. B. Thank you all the same.C. It ’s very kind of you. 3.A. Yes. Who ’s that? B. Yes. Who are you? C. Yes, it is. 4.A. It is Tuesday. B. It ’s a sunny day. C. It ’s May 20. 5.A. It ’s my pleasure. B. I ’m glad to hear it. C. You’re very kind. (二)听对话和对话后的问题,选择正确答案( 5 分) 1.A. Friday B. Thursday. C. Saturday 2.A. Class 4, Grade 2. B. Class 5, Grade 2. C. Class 5, Grade 2 3.A. Eggs and tea. B. Bread and tea. C. Tea, bread and eggs 4.A. 8673305 B. 8673350 C. 8763305 5.A. Japan B. London C. Washington (三)听短文和短文后的问题,选择正确答案(10 分) 1.A. Three B. Six C. Four 2.A. She is a teacher. B. She is a doctor. C. She is a worker. 3.A. He likes collecting foreign stamps. B. He likes to go skating in winter C. He likes to go swimming in summer. 4.A. He wants Li Ping to send him a message. B.He wants Li Ping to send him some stamps. C.He wants Li Ping to send him some photos. 5. A. Before lunch B. Before supper C. After supper 二、单项选择(每题 1 分,共 15 分) 1.Mr Green has three daughters, but _________of them lives with him. 2.They all felt _______ after a ________ bus ride. A. happy; pleased B. pleasant; pleased C. pleased; pleasant D. happy; pleasure 3.No matter ___________, I won ’tagree with him. A. what he does say hat he says C. how he says D. what does he say 4.---___________ have you lived there? --- I ’ve lived there __________ I left school. A. How long; since B. How soon; when C. How long; as soon as D. When; since 5.This jacket is so nice, but it __________ too much. 6.I’ve never seen _________ mountain in my life. A. so beautiful B. such a beautiful C. so beautiful a D. such beautiful a 7. The old man didn ’t allow us ________ into the house. It ’s dangerous.

山东省威海市中考数学试卷及答案解析

山东省威海市2014年中考数学试卷 一、选择题(共12小题,每小题3分,共36分) 31.(3分)(2014?威海)若a=8,则a的绝对值是() 2 B.﹣2 C.D.A.﹣ 考点:立方根;绝对值 运用开立方的方法求解.分析: 3解答:,解:∵a=8 .∴a=2 .故选:A点评:本题主要考查开立方的知识,关键是确定符号. 2.(3分)(2014?威海)下列运算正确的是() 233322222A.B.C.D.9 ﹣﹣b)=﹣3)=x(x﹣(a =5x=2x 3x+2x2x÷x63 ab 完全平方公式.整式的除法;合并同类项;幂的乘方与积的乘方;考点:菁再根据系数相等,相同字母的根据单项式除单项式的法则计算,分析: 次数相同,以及幂的乘方,合并同类项法则求解即可.22解答:,选项错误;2x÷x=2解:A、3623,选项错误;﹣abB、(﹣ab)= 、正确;C233 9x+27x,选项错误.﹣﹣3)=x﹣27D、(x 故选C.本题考查了单项式除单项式,以及幂的乘方,合并同类项法则,点评: 正确记忆法则是关键. 3.(3分)(2014?威海)将下列多项式分解因式,结果中不含因式x﹣1的是() 222A.B.x(x﹣2)+(2C.D.x﹣1 x﹣2x+1 x+2x+1 ﹣x) 考点:因式分解-提公因式法;因式分解-运用公式法. 分别将各选项利用公式法和提取公因式法分解因式进而得出答案.分析: 2解答:),故此选项错误;x)(﹣1、x﹣1=(x+1A解:),故此选项错误;﹣1x﹣2)(x﹣x ﹣2)+(2x)=((B、x22﹣1),故此选项错误;xC、﹣2x+1=(x22),故此选项符合题意.(D、x+2x+1=x+1 D.故选:点评:此题主要考查了提取公因式法以及公式法分解因式,熟练掌握公

五年中考三年模拟语文中考试卷答案

五年中考三年模拟语文中考试卷答案 一、选择。下面各题均有四个选项,其中只有一个符合题意,选出答案后在答题卡上用铅笔把对 应题目的选项字母涂黑涂满。(共12分。每小题2分) 1.下列词语中加点字的读音完全正确的一项是 A.狡黠(jí)悲恸(tònɡ)偃旗息鼓(yǎn) B.缄默(jiān)忸怩(ní)声名狼藉(jí) C.木讷(nè)解元(xiè)珠烁晶莹(shuò) D.兀自(wù)桑梓(xīn)煞有介事(shà) 2.下列词语的字形完全正确的一项是 A.跋山涉水班门弄斧变本加厉变换莫测 B.层峦叠嶂承前起后高瞻远瞩恰如其分 C.功亏一篑焕然一新见异思迁举一反三 D.流连忘返明查秋毫两全其美千姿百态 3.依据对下列各组词语中加点字的解释,判断词语意思都不正确的一项是 A.各行其是——搬弄是非 解释:“是”有“正确”或“以为正确”的意思。 判断:“各行其是”指各自按照自己以为正确的去做;“搬弄是非”指在别人背后乱加对 与错的评论,引起纠纷。 B.不言而喻——家喻户晓 解释:“喻”有“明白、了解”的意思。 判断:“不言而喻”指不用说就可以明白;“家喻户晓”指每家每户都知道。 C.默默无闻——骇人听闻 解释:“闻”有“听到”的意思。 判断:“默默无闻”指独自默默地去做,不听任何外界言论;“骇人听闻”指令人吃惊的事 使人容易扬名。 D.莫名其妙——不可名状 解释:“名”有“说出”的意思。 判断:“莫名其妙”指没有人能说出它的奥妙,表示事情很奇怪;“不可名状”指不能用语言形容(说出)。 4.结合语境,在下列语句中的横线处填写词、句最恰当的一项是 ①,多阅读一些文学鉴赏方面的文章不是在浪费时间,而是更有利于提高学生的文学鉴赏水平。例如,关于如何鉴赏文学语言的情感性,有这样的阐述:文学是人学,表 现富有情感的形象及其意义。雨果说过,比大地更广阔的是海洋,比海洋更广阔的是天空, 比天空更广阔的是人的内心。②。文学作品以情动人,以情育人。 A.①“磨刀不误砍柴功”②文学反映客观世界,更反映人的内心世界和情感 B.①“磨刀不误砍柴功”②文学反映人的内心世界和情感,更反映客观世界 C.①“滴水穿石”②文学反映客观世界,更反映人的内心世界和情感 D.①“滴水穿石”②文学反映人的内心世界和情感,更反映客观世界 5.下列句子的标点符号使用正确的一项是 A.天宫一号——即我国第一个目标飞行器,于2011年9月29日在酒泉卫星发射中心发射,标志着中国航天“三步走”战略更进一步。 B.新的《公共场所卫生管理条例实施细则》(以下简称《细则》)实施后,包括茶室在内的20 多类室内公共场所开始全面禁烟。 C.北京小吃大约二、三百种,是融合了汉、回、蒙、满等多民族风味小吃以及明、清

2017年山东省威海市中考数学试卷(解析版)

2017年山东省威海市中考数学试卷 参考答案与试题解析 一、选择题:本大题共12小题,每小题3分,共36分,在每小题给出的四个选项中,只有一个是正确的,每小题选对得3分,选错、不选或多选,均不得分. 1.从新华网获悉:商务部5月27日发布的数据显示,一季度,中国与“一带一路”沿线国家在经贸合作领域保持良好发展势头,双边货物贸易总额超过16553亿元人民币,16553亿用科学记数法表示为() A.1.6553×108 B.1.6553×1011C.1.6553×1012D.1.6553×1013 【分析】科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数.确定n的值时,要看把原数变成a时,小数点移动了多少位,n的绝对值与小数点移动的位数相同.当原数绝对值>1时,n是正数;当原数的绝对值<1时,n 是负数. 【解答】解:将16553亿用科学记数法表示为:1.6553×1012. 故选:C. 【点评】此题考查科学记数法的表示方法.科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数,表示时关键要正确确定a的值以及n的值. 2.某校排球队10名队员的身高(厘米)如下: 195,186,182,188,188,182,186,188,186,188. 这组数据的众数和中位数分别是() A.186,188 B.188,187 C.187,188 D.188,186 【分析】根据众数和中位数的定义求解可得. 【解答】解:将数据重新排列为:182、182、186、186、186、188、188、188、188、195, ∴众数为188,中位数为=187, 故选:B. 【点评】本题考查众数与中位数的意义.中位数是将一组数据从小到大(或从大

中考数学试题(及答案)

中考数学试题(及答案) 一、选择题 1.华为Mate20手机搭载了全球首款7纳米制程芯片,7纳米就是0.000000007米.数据 0.000000007用科学记数法表示为( ). A .7710?﹣ B .8 0.710?﹣ C .8710?﹣ D .9710?﹣ 2.下列四个实数中,比1-小的数是( ) A .2- B .0 C .1 D .2 3.在数轴上,与表示6的点距离最近的整数点所表示的数是( ) A .1 B .2 C .3 D .4 4.若一元二次方程x 2﹣2kx +k 2=0的一根为x =﹣1,则k 的值为( ) A .﹣1 B .0 C .1或﹣1 D .2或0 5.下列图形是轴对称图形的有( ) A .2个 B .3个 C .4个 D .5个 6.将两个大小完全相同的杯子(如图甲)叠放在一起(如图乙),则图乙中实物的俯视图 是( ). A . B . C . D . 7.分式方程 ()()31112x x x x -=--+的解为( ) A .1x = B .2x = C .1x =- D .无解 8.将一个矩形纸片按如图所示折叠,若∠1=40°,则∠2的度数是( ) A .40° B .50° C .60° D .70° 9.甲、乙、丙三家超市为了促销一种定价相同的商品,甲超市先降价20%,后又降价10%;乙超市连续两次降价15%;丙超市一次性降价30%.则顾客到哪家超市购买这种商品更合算( )

A .甲 B .乙 C .丙 D .一样 10.已知直线//m n ,将一块含30°角的直角三角板ABC 按如图方式放置 (30ABC ∠=?),其中A ,B 两点分别落在直线m ,n 上,若140∠=?,则2∠的度数为( ) A .10? B .20? C .30° D .40? 11.如图,在平行四边形ABCD 中,M 、N 是BD 上两点,BM DN =,连接AM 、 MC 、CN 、NA ,添加一个条件,使四边形AMCN 是矩形,这个条件是( ) A .12 OM AC = B .MB MO = C .B D AC ⊥ D .AMB CND ∠=∠ 12.cos45°的值等于( ) A .2 B .1 C . 3 D . 22 二、填空题 13.在学习解直角三角形以后,某兴趣小组测量了旗杆的高度.如图,某一时刻,旗杆AB 的影子一部分落在水平地面L 的影长BC 为5米,落在斜坡上的部分影长CD 为4米.测得斜CD 的坡度i =1: .太阳光线与斜坡的夹角∠ADC =80°,则旗杆AB 的高度 _____.(精确到0.1米)(参考数据:sin50°=0.8,tan50°=1.2, =1.732) 14.若a ,b 互为相反数,则22a b ab +=________. 15.若关于x 的一元二次方程kx 2+2(k+1)x+k -1=0有两个实数根,则k 的取值范围是 16.在Rt△ABC 中,∠C=90°,AC=6,BC=8,点E 是BC 边上的动点,连接AE ,过点E 作AE 的垂线交AB 边于点F ,则AF 的最小值为_______ 17.我国倡导的“一带一路”建设将促进我国与世界各国的互利合作,“一带一路”地区覆盖总人口约为4400000000人,将数据4400000000用科学记数法表示为______.

中考数学压轴题解题方法大全及技巧

中考数学压轴题解题技巧 竹溪城关中学明道银 解中考数学压轴题秘诀(一) 数学综合题关键是第24题和25题,我们不妨把它分为函数型综合题和几何型综合题。 (一)函数型综合题:是先给定直角坐标系和几何图形,求(已知)函数的解析式(即在求解前已知函数的类型),然后进行图形的研究,求点的坐标或研究图形的某些性质。初中已知函数有:①一次函数(包括正比例函数)和常值函数,它们所对应的图像是直线;②反比例函数,它所对应的图像是双曲线; ③二次函数,它所对应的图像是抛物线。求已知函数的解析式主要方法是待定系数法,关键是求点的坐标,而求点的坐标基本方法是几何法(图形法)和代数法(解析法)。此类题基本在第24题,满分12分,基本分2-3小题来呈现。 (二)几何型综合题:是先给定几何图形,根据已知条件进行计算,然后有动点(或动线段)运动,对应产生线段、面积等的变化,求对应的(未知)函数的解析式(即在没有求出之前不知道函数解析式的形式是什么)和求函数的定 义域,最后根据所求的函数关系进行探索研究,一般有:在什么条件下图形是等腰三角形、直角三角形、四边形是菱形、梯形等或探索两个三角形满足什么条件相似等或探究线段之间的位置关系等或探索面积之间满足一定关系求x的值等和直线(圆)与圆的相切时求自变量的值等。求未知函数解析式的关键是列出包含自变量和因变量之间的等量关系(即列出含有x、y的方程),变形写成y=f(x)的形式。一般有直接法(直接列出含有x和y的方程)和复合法(列出含有x和y和第三个变量的方程,然后求出第三个变量和x之间的函数关系式,代入消去第三个变量,得到y=f(x)的形式),当然还有参数法,这个已超出初中数学教学要求。找等量关系的途径在初中主要有利用勾股定理、平行线截得比例线段、三角形相似、面积相等方法。求定义域主要是寻找图形的特殊位置(极限位置)和根据解析式求解。而最后的探索问题千变万化,但少不了对图形的分析和研究,用几何和代数的方法求出x的值。几何型综合题基本在第25题做为压轴题出现,满分14分,一般分三小题呈现。 在解数学综合题时我们要做到:数形结合记心头,大题小作来转化,潜在条件不能忘,化动为静多画图,分类讨论要严密,方程函数是工具,计算推理要严谨,创新品质得提高。 解中考数学压轴题秘诀(二) 具有选拔功能的中考压轴题是为考察考生综合运用知识的能力而设计的题目,其特点是知识点多,覆盖面广,条件隐蔽,关系复杂,思路难觅,解法灵活。

5年中考3年模拟中考数学答案.doc

5 年中考3 年模拟中考数学答案【篇一:近 5 年中考 3 年模拟试题汇编(圆的部分)含答 案】 点p 在直径ab 的延长线上,pc ,pd 与⊙o 相切,切点分别为点c,点d,连接cd 交ab 于 点e.如果⊙o 的半径等于 tan?cpo? 弦cd 的长. 2.如图,在△abc 中,点 d 在 ac 上,da=db ,∠c= ∠dbc ,以ab 为直径的⊙o 交ac 于点 e, f 是⊙o 上的点,且 (1)求证:bc 是⊙o 的切线;(2)若sinc= 1 ,求 2 3 f oc?3oe ,3.如图,在⊙o 中,弦bc ,bd 关于直径ab 所在直线对称.e 为半径oc 上一点,连接ae 并延长交⊙o 于点f,连接df 交bc 于点m .(1)请依题意补全图形;(2)求证:?aoc??dbc ;(3)求 bm 的值.bc 4、.如图,在△abc 中,ba=bc ,以ab 为直径的⊙o 分别交ac , (第12 题图) 5.如图,ab 是⊙o 的直径,ab=10,c 是⊙o 上一点,od ⊥bc 于 点d,bd =4,则ac 的长为. 第11 题图a o c d b 6.如图,△abc 内接于⊙o,弦ad ⊥ab 交bc 于点e,过点 b 作 ⊙o 的切线交da 的延

长线于点f,且∠abf =∠abc .(1)求证:ab=ac;(2)若ad =4,cos ∠abf = 4 ,求de 的长. 5 7.如图,在△abc 中,ab=ac ,以ab 为直径的⊙o 与边bc 、ac 分别交于d、e 两点,df?ac 于f. (1)求证:df 为⊙o 的切线;(2)若cosc? 8.如图,ac 为⊙o 的直径,ac=4 ,b、d 分别在ac bd 与ac 的交点为e. (1) 求点o 到bd 的距离及 ∠obd 的度数; 9.如图,在△abc 中,ac=bc ,d 是bc 上的一点,且满足∠bad =径的⊙o 与ab、ac 分别相交于点e、f. (1)求证:直线bc 是⊙o 的切线;(2)连接ef,若tan ∠aef= 3 ,cf=9 ,求ae 的长. 5 (2) 若de=2be ,求cos?oed 的值和cd 的长.1 ∠c,以ad 为直 2 4 ,ad=4,求bd 的长. 3 b 10.如图,在⊙o 中,直径cd ⊥弦ab 于点e,点f 在弧ac 若∠ bcd (2010 )11、已知:如图,在△abc 中,d 是ab 边上一点,⊙o 过d、 (1)求证:直线ac 是⊙o 的切线; (2009 )10.如图,ab 为⊙o 的直径,弦cd ⊥ab ,e 为bc 上 点, 若∠cea=28 ,则∠abd=. 20. 已知:如图,在△abc 中,ab=ac,ae 是角平分线,bm 平 分∠abc 交ae 于点m,经过b,m 两点的⊙o 交bc 于点g,交ab 于点f,fb 恰为⊙o 的直径. (1)求证:ae 与⊙o 相切;(2)当 bc=4,cosc= 一

2013年山东省威海市中考数学试卷及答案(Word解析版)

山东省威海市2013年中考数学试卷 一、选择题(共12小题,每小题3分,满分36分) 1.(3分)(2013?威海)花粉的质量很小,一粒某种植物花粉的质量约为0.000037毫克,已知1克=1000毫克,那么0.000037毫克可用科学记数法表示为() A.3.7×10﹣5克B.3.7×10﹣6克C.37×10﹣7克D.3.7×10﹣8克 考点:科学记数法—表示较小的数 分析:绝对值小于1的正数也可以利用科学记数法表示,一般形式为a×10﹣n,与较大数的科学记数法不同的是其所使用的是负指数幂,指数由原数左边起第一个不为零的数字前面的0的个数所决定. 解答:解:1克=1000毫克, 将0.000037毫克用科学记数法表示为:3.7×10﹣8克. 故选D. 点评:本题考查用科学记数法表示较小的数,一般形式为a×10﹣n,其中1≤|a|<10,n为由原数左边起第一个不为零的数字前面的0的个数所决定. 2.(3分)(2013?威海)下列各式化简结果为无理数的是() A.B.C.D. 考点:立方根;算术平方根;零指数幂. 分析:先将各选项化简,然后再判断. 解答: 解:A、=﹣3,是有理数,故本选项错误; B、(﹣1)0=1,是有理数,故本选项错误; C、=2,是无理数,故本选项正确; D、=2,是有理数,故本选项错误; 故选C. 点评:本题考查了无理数、立方根及零指数幂的知识,属于基础题. 3.(3分)(2013?威海)下列运算正确的是() A.3x2+4x2=7x4B.2x3?3x3=6x3C.x6+x3=x2D.(x2)4=x8 考点:单项式乘单项式;合并同类项;幂的乘方与积的乘方. 专题:计算题. 分析:根据单项式乘单项式、合并同类项、幂的乘方与积的乘方的定义解答. 解答:解:A、∵3x2+4x2=7a2≠7x4,故本选项错误; B、∵2x3?3x3=2×3x3+3≠6x3,故本选项错误; C、∵x6和x3不是同类项,不能合并,故本选项错误; D、∵(x2)4=x2×4=x8,故本选项正确. 故选D. 点评:本题考查了单项式乘单项式、合并同类项、幂的乘方与积的乘方,熟练掌握运算法则是解题

2020年中考数学试题(及答案)

2020年中考数学试题(及答案) 一、选择题 1.华为Mate20手机搭载了全球首款7纳米制程芯片,7纳米就是0.000000007米.数据 0.000000007用科学记数法表示为( ). A .7710?﹣ B .8 0.710?﹣ C .8710?﹣ D .9710?﹣ 2.预计到2025年,中国5G 用户将超过460 000 000,将460 000 000用科学计数法表示为 ( ) A .94.610? B .74610? C .84.610? D .90.4610? 3.在某校“我的中国梦”演讲比赛中,有9名学生参加决赛,他们决赛的最终成绩各不相同.其中的一名学生想要知道自己能否进入前5名,不仅要了解自己的成绩,还要了解这9名学生成绩的( ) A .众数 B .方差 C .平均数 D .中位数 4.三张外观相同的卡片分别标有数字1,2,3,从中随机一次性抽出两张,则这两张卡片上的数字恰好都小于3的概率是( ) A . 1 9 B . 16 C . 13 D . 23 5.点 P (m + 3,m + 1)在x 轴上,则P 点坐标为( ) A .(0,﹣2) B .(0,﹣4) C .(4,0) D .(2,0) 6.如图,直线l 1∥l 2,将一直角三角尺按如图所示放置,使得直角顶点在直线l 1上,两直角边分别与直线l 1、l 2相交形成锐角∠1、∠2且∠1=25°,则∠2的度数为( ) A .25° B .75° C .65° D .55° 7.在某篮球邀请赛中,参赛的每两个队之间都要比赛一场,共比赛36场,设有x 个队参赛,根据题意,可列方程为() A . ()1 1362 x x -= B . ()1 1362 x x += C .()136x x -= D .()136x x += 8.甲、乙、丙三家超市为了促销一种定价相同的商品,甲超市先降价20%,后又降价10%;乙超市连续两次降价15%;丙超市一次性降价30%.则顾客到哪家超市购买这种商品更合算( ) A .甲 B .乙 C .丙 D .一样 9.下列计算错误的是( ) A .a 2÷ a 0?a 2=a 4 B .a 2÷(a 0?a 2)=1 C .(﹣1.5)8÷(﹣1.5)7=﹣1.5 D .﹣1.58÷(﹣1.5)7=﹣1.5

2014中考数学压轴题及答案40例

2014中考数学压轴题精选精析(21-30例) 21.(2011?湖南邵阳)如图(十一)所示,在平面直角坐标系Oxy 中,已知点A (-94 ,0),点C (0,3),点B 是x 轴上一点(位于点A 的右侧),以AB 为直径的圆恰好经过.... 点C . (1)求∠ACB 的度数; (2)已知抛物线y =ax 2+bx +3经过A 、B 两点,求抛物线的解析式; (3)线段BC 上是否存在点D ,使△BOD 为等腰三角形.若存在,则求出所有符合条件的点D 的坐标;若不存在,请说明理由. 【解题思路】:(1) ∵以AB 为直径的圆恰好经过....点C ∴∠ACB =0 90 (2) ∵△AOC ∽△ABC ∴OB AO OC ?=2 ∵A (-94,0),点C (0,3),∴4 9=AO 3=OC ∴OB 4 932= ∴ 4=OB ∴B(4,0) 把 A 、B 、C 三点坐标代入得 3127312++-=x x y (3) 1)OD=OB , D 在OB 的中垂线上,过D 作DH ⊥OB,垂足是H 则H 是OB 中点。DH=OC 21 OB OH 2 1= ∴D )23,2( 2) BD=BO 过D 作DG ⊥OB,垂足是G ∴OG:OB=CD:CB DG:OC=1:5 ∴ OG:4=1:5 DG:3=1:5 ∴OG= 54 DG=53 ∴D(54,53)

【点评】:本题考察了相似、勾股定理、抛物线的解析式求解等知识,运用平行于三角形一边的直线截其他两边所得的三角形与原三角形相似构建比例式,求解点到坐标轴的距离,进而得出相应的坐标。难度中等 24、(2011?湖北荆州)如图甲,分别以两个彼此相邻的正方形OABC与CDEF的边OC、OA 所在直线为x轴、y轴建立平面直角坐标系(O、C、F三点在x轴正半轴上).若⊙P过A、B、E三点(圆心在x轴上),抛物线y= 14x2+bx+c经过A、C两点,与x轴的另一交点为G,M是FG的中点,正方形CDEF的面积为1. (1)求B点坐标; (2)求证:ME是⊙P的切线; (3)设直线AC与抛物线对称轴交于N,Q点是此轴称轴上不与N点重合的一动点, ①求△ACQ周长的最小值; ②若FQ=t,S△ACQ=S,直接写出S与t之间的函数关系式. 考点:二次函数综合题. 分析:(1)如图甲,连接PE、PB,设PC=n,由正方形CDEF的面积为1,可得CD=CF=1,根据圆和正方形的对称性知:OP=PC=n,由PB=PE,根据勾股定理即可求得n的值,继而求得B的坐标; (2)由(1)知A(0,2),C(2,0),即可求得抛物线的解析式,然后求得FM的长,则可得△PEF∽△EMF,则可证得∠PEM=90°,即ME是⊙P的切线; (3)①如图乙,延长AB交抛物线于A′,连CA′交对称轴x=3于Q,连AQ,则有AQ=A′Q,△ACQ周长的最小值为AC+A′C的长,利用勾股定理即可求得△ACQ周长的最小值; ②分别当Q点在F点上方时,当Q点在线段FN上时,当Q点在N点下方时去分析即可求

5年中考3年模拟答案物理

5年中考3年模拟答案物理 【篇一:五年中考三年模拟物理】 p class=txt>一、选择题 1、【2009?济宁市】为了探究声音的响度与振幅的关系,小明设计了如图4所示的几个实验。你认为能够完成这个探究目的的是【】d 用大小不同的力敲打 鼓面,观察纸屑跳动 的情况图4 2.(2011浙江杭州,第5题)小李的质量为50千克,可以举起 80千克的杠铃;小胖的质量为70千克,可以举起60千克的杠铃。 他们两人通过如图所示的装置来比赛,双方竭尽全力,看谁能把对 方拉起来,比赛结果应是() a.小李把小胖拉起 b.小胖把小李拉起 c.两个都拉不起 d.两个都拉起 【答案】b 3.(2011浙江杭州,第5题)小王同学用光具座做凸透镜成像实 验时,蜡烛的像成在了光屏上侧,为了使蜡烛的像能成在光屏中央,以下操作可达到目的的是() a.将凸透镜往上移b.将光屏往下移 c.将蜡烛往上移d.将蜡烛往下移 【答案】c 4、【2009?荆门市】下列关于生活中常见热现象的解释,错误的是【】c .. a.在高山上烧水时,温度不到90℃水就沸腾了,是因为水的沸点与 气压有关 b.天热时,狗常把舌头伸出口,实际上是利用蒸发致冷 c.衣柜里防虫的樟脑丸越来越小,这是汽化现象 d.冬天,冰冻的湿衣服直接变干是升华现象 5.(2011浙江杭州,第5题)如右图所示,一般在某水域作业时,将装满金属工具的大铁箱用绳子悬放入水。第一次放,因水太深, 铁箱没触碰到水底,此时船的吃水线在a处。换个地方第二次再放,铁箱才接触到水底。下列说法正确的是() a.铁箱在船上时,船的吃水线在a处下方 b.铁箱接触到水底时,船的吃水线仍在a处

2020中考数学试卷及答案

2020中考数学试卷及答案 精心选一选(本大题共10小题,每题3分,共30分. 在每题所给出的四个选项中,只有一项是符合题意的. 把所选项前的字母代号填在括号内. 相信你一定会选对!) 1、函数24-=x y 中自变量x 的取值范围是() A 、2>x B 、2≥x C 、2≠x D 、2

4、如图1,天平右盘中的每个砝码的质量都是1g ,则正视图左视图俯视图A A 图1 物体A 的质量m(g)的取值范围,在数轴上可表示为() 5、把分式方程 12121=----x x x 的两边同时乘以(x-2), 约去分母,得( ) A .1-(1-x)=1 B .1+(1-x)=1

.1-(1-x)=x-2 D .1+(1-x)=x-2 6、在一副52张扑克牌中(没有大小王)任意抽取一张牌,抽出的这张牌是方块的机会是() A 、21 B 、41 C 、31 D 、0 7.将函数762++=x x y 进行配方正确的结果应为()A 2)3(2++=x y B 2)3(2+-=x y C 2)3(2-+=x y D 2)3(2--=x y 8、一个形式如圆锥的冰淇淋纸筒,其底面直径为cm 6, 母线长为cm 5,围成这样的冰淇淋纸筒所需纸片的面积是() A 、266cm π B 、230cm π C 、228cm π D 、B 0 A C D 9、某村的粮食总产量为a (a 为常量)吨,设该村粮食的人均产量为y (吨),人口数为x ,则y 与x 之间的函数图象应为图中的()10、在圆环形路上有均匀分布的四家工厂甲、乙、丙、丁,每家工厂都有足够的仓库供产品储存. 现要将所有产品集中到一家工厂的仓库储存,已知甲、乙、丙、丁四家工厂的产量之比为1∶2∶3∶5. 若运费与路程、运的数量成正比例,为使选定的工厂仓库储存所有产品时总的运费最省,应选的工厂是() A 、甲B 、乙 C 、丙D 、丁 二、细心填一填(本大题共有5小题,每 空4分,共20分.) 11、分解因式:3x 2-12y 2= . 12.如图9,D 、E 分别是∶ABC 的边AC 、AB 上的点,请你添加一个条件,使∶ADE 与∶ABC 相似.你添加的条件 甲乙丙丁

中考数学压轴题归类复习(十大类型附详细解答)

中考数学压轴题辅导(十大类型) 目录 动点型问题 (3) 几何图形的变换(平秱、旋转、翻折) (6) 相似不三角函数问题9 三角形问题(等腰直角三角形、等边三角形、全等三角形等) (13) 不四边形有关的二次函数问题 (16) 刜中数学中的最值问题 (19) 定值的问题 (22) 存在性问题(如:平行、垂直,动点,面积等) (25) 不圆有关的二次函数综合题... .. (29) 其它(如新定义型题、面积问题等) (33) 参考答案 (36)

中考数学压轴题辅导(十大类型) 数学综压轴题是为考察考生综合运用知识的能力而设计的,集中体现知识的综合性和方 法的综合性,多数为函数型综合题和几何型综合题。 函数型综合题:是给定直角坐标系和几何图形,先求函数的解析式,再迚行图形的研究,求点的坐标戒研究图形的某些性质。求已知函数的解析式主要方法是待定系数法,关键是求点的坐标,而求点的坐标基本方法是几何法(图形法)和代数法(解析法)。 几何型综合题:是先给定几何图形,根据已知条件迚行计算,然后有动点(戒动线段)运动,对应产生线段、面积等的变化,求对应的(未知)函数的解析式,求函数的自变量的取值范围,最后根据所求的函数关系迚行探索研究。一般有:在什么条件下图形是等腰三角形、直角三角形,四边形是平行四边形、菱形、梯形等,戒探索两个三角形满足什么条件相似等,戒探究线段乊间的数量、位置关系等,戒探索面积乊间满足一定关系时求 x 的值等,戒直线(圆) 不圆的相切时求自变量的值等。求未知函数解析式的关键是列出包含自变量和因变量乊间的 等量关系(即列出含有 x、y 的方程),变形写成 y=f(x)的形式。找等量关系的途径在刜中主要有利用勾股定理、平行线截得比例线段、三角形相似、面积相等方法。求函数的自变量 的取值范围主要是寻找图形的特殊位置(极端位置)和根据解析式求解。而最后的探索问题千 变万化,但少丌了对图形的分析和研究,用几何和代数的方法求出 x 的值。 解中考压轴题技能:中考压轴题大多是以坐标系为桥梁,运用数形结合思想,通过建立点不数即坐标乊间的对应关系,一方面可用代数方法研究几何图形的性质,另一方面又可借助几何直观,得到某些代数问题的解答。关键是掌握几种常用的数学思想方法。 一是运用函数不方程思想。以直线戒抛物线知识为载体,列(解)方程戒方程组求其解 析式、研究其性质。 二是运用分类讨论的思想。对问题的条件戒结论的多变性迚行考察和探究。 三是运用转化的数学的思想。由已知向未知,由复杂向简单的转换。中考压轴题它是对考生综合能力的一个全面考察,所涉及的知识面广,所使用的数学思想方法也较全面。因此,可把压轴题分离为相对独立而又单一的知识戒方法组块去思考和探究。 解中考压轴题技能技巡: 一是对自身数学学习状况做一个完整的全面的认识。根据自己的情况考试的时候重心定位准确,防止“捡芝麻丢西瓜”。所以,在心中一定要给压轴题戒几个“难点”一个时间上 的限制,如果超过你设置的上限,必须要停止,回头认真检查前面的题,尽量要保证选择、填空 万无一失,前面的解答题尽可能的检查一遍。 二是解数学压轴题做一问是一问。第一问对绝大多数同学来说,丌是问题;如果第一小问丌会解,切忌丌可轻易放弃第二小问。过程会多少写多少,因为数学解答题是按步骤给分的,写上去的东西必须要规范,字迹要巟整,布局要合理;过程会写多少写多少,但是丌要说废话,计算中尽量回避非必求成分;尽量多用几何知识,少用代数计算,尽量用三角函数,少在直角三角形中使用相似三角形的性质。 三是解数学压轴题一般可以分为三个步骤。认真审题,理解题意、探究解题思路、正确 解答。审题要全面审视题目的所有条件和答题要求,在整体上把握试题的特点、结构,以利于解题方法的选择和解题步骤的设计。解数学压轴题要善于总结解数学压轴题中所隐含的重

5年中考3年模拟数学

数学测试题(问卷) 姓名:_____________ 、选择题(下列各题都给出A、B、C D的四个答案,其中有且只有一个是正确的,用 2B铅笔把正确答案的代号填在答题卡上, 1 1. 的绝对值是( 7 1 A . 7 C. 7 每题 2.下列运算, 正确的是( 3分,共30分) -7 2 A. a 2 a B. C. 6 . 3 a ■ ■■ a D.(a3)2二a6 3.若分式 2x-1 1 A . > - 2 3 —无意义,则x的取值范围为). 1 2 4.下列图形中既是轴对称图形,又是中心对称图形的是 C. A. B. 2 5.方程x= 4x的解是( ) B. x = 2或x=-2 C. x=4或x = 0 k 6. 已知点M ( —2, 4 )在双曲线y 上,则下列各点一定在该双曲线上的是( x A . ( 4, -2 ) B. ( -2, -4 ) C. 7. 小亮每天从家去学校上学行走的路程为900米, 行走了450米,为了不迟到他加快了速度,以每分 A . X =4 (2, 4 ) D. (4, 2) 某天他从家去上学时以每分30米的速度 45米的速度行走完剩下的路程,那么小 ( ). 亮行走过的路程S(米)与他行走的时间t(分)之间的函数关系用图象表示正确的是 J 's/A o S 10 15 20 2S (A) (B) 8.如图,O O是厶ABC的外接圆,AB是直径. A. 60° B. 50° C. 40 J X. 450 5 10 15 20 25 P 分O (C) 900 (D) D.

15.如图,AB与O O相切于点B , AO的延长线交O O于点C,连结BC .若.A = 50 ] 则N C = ___ 16. _________ 展览厅内要用相同的正方体木块搭成一个三视图如右图的展台,则此展台共需这样的正方体_______ 块. 9.如图,在平行四边形ABCD中,E是AB的中点, 为 m,A OEB的面积为?、. 5,则下列结论中正确的是 A. m =5 B. m=4,5 C. m=3,5 CE和BD交于点O ,设厶OCD的面积 ) D. m = 10 10.图①是一个边长为(m n)的正方形,小颖将图①中的阴影部分拼成图②的形状,由图 ①和图②能验证的式子是( ) 2 2 A. (m n) 「(m「n) 4mn B . (m n)2-(m2 n2) =2mn C. (m -n)2 2mn = m2 n2 D . (m n)(m _n) = m2 _ n2 图①图② 11. 12. DE 填空题(本大题每题3分,共18分,把答案填在答卷对应的横线上) 2 方程1的根为 x_3 如图,在梯形ABCD中,AD // BC, E为BC上一点, // AB, AD的长为1 , BC的长为2,则CE的长为___________ . 13.命题“对角线垂直且相等的四边形是正方形”的逆命题是: 该逆命题是_J_命题(填真”或假”). 14.如图所示的圆锥的主视图是一个等边三角形,边长为6,则这个圆锥的侧面积为 n) (第15 题) (第14 题)

历年全国中考数学试题及答案

班级 姓名 学号 成绩 一、精心选一选 1.下列运算正确的是( ) A.()11a a --=-- B.( ) 2 3624a a -= C.()2 22a b a b -=- D.3 2 5 2a a a += 2.如图,由几个小正方体组成的立体图形的左视图是( ) 3.下列事件中确定事件是( ) A.掷一枚均匀的硬币,正面朝上 B.买一注福利彩票一定会中奖 C.把4个球放入三个抽屉中,其中一个抽屉中至少有2个球 D.掷一枚六个面分别标有1,2,3,4,5,6的均匀正方体骰子,骰子停止转动后奇数点朝上 4.如图,AB CD ∥,下列结论中正确的是( ) A.123180++=∠ ∠∠ B.123 360++=∠ ∠∠ C.1322+=∠∠∠ D.132+=∠∠∠ 5.已知24221 x y k x y k +=??+=+?,且10x y -<-<,则k 的取值范围为( ) A.112 k -<<- B.102 k << C.01k << D. 1 12 k << 6.顺次连接矩形各边中点所得的四边形( ) A.是轴对称图形而不是中心对称图形 B.是中心对称图形而不是轴对称图形 C.既是轴对称图形又是中心对称图形 D.没有对称性 7.已知点()3A a -,,()1B b -,,()3C c ,都在反比例函数4 y x = 的图象上,则a ,b ,c 的大小关系为( ) A.a b c >> B.c b a >> C.b c a >> D.c a b >> 8.某款手机连续两次降价,售价由原来的1185元降到580元.设平均每次降价的百分率为x ,则下面列出的方程中正确的是( ) A.2 1185580x = B.()2 11851580x -= C.( )2 11851580x -= D.()2 58011185x += A. B. C. D. A B D C 3 2 1 第4题图

中考数学压轴题(含答案)

2016中考压轴题突破 训练目标 1.熟悉题型结构,辨识题目类型,调用解题方法; 2.书写框架明晰,踩点得分(完整、快速、简洁)。 题型结构及解题方法 压轴题综合性强,知识高度融合,侧重考查学生对知识的综合运用能力,对问题背景的研究能力以及对数学模型和套路的调用整合能力。

答题规范动作 1.试卷上探索思路、在演草纸上演草。 2.合理规划答题卡的答题区域:两栏书写,先左后右。 作答前根据思路,提前规划,确保在答题区域内写完答案;同时方便修改。 3.作答要求:框架明晰,结论突出,过程简洁。 23题作答更加注重结论,不同类型的作答要点: 几何推理环节,要突出几何特征及数量关系表达,简化证明过程; 面积问题,要突出面积表达的方案和结论; 几何最值问题,直接确定最值存在状态,再进行求解; 存在性问题,要明确分类,突出总结。 4.20分钟内完成。 实力才是考试发挥的前提。若在真题演练阶段训练过程中,对老师所讲的套路不熟悉或不知道,需要查找资源解决。下方所列查漏补缺资源集中训练每类问题的思路和方法,这些训练与真题演练阶段的训练互相补充,帮学生系统解决压轴题,以到中考考场时,不仅题目会做,而且能高效拿分。课程名称: 2014中考数学难点突破 1、图形运动产生的面积问题 2、存在性问题 3、二次函数综合(包括二次函数与几何综合、二次函数之面积问题、二次函数中的存在性问题) 4、2014中考数学压轴题全面突破(包括动态几何、函数与几何综合、点的存在性、三角形的存 在性、四边形的存在性、压轴题综合训练)

一、图形运动产生的面积问题 一、 知识点睛 1. 研究_基本_图形 2. 分析运动状态: ①由起点、终点确定t 的范围; ②对t 分段,根据运动趋势画图,找边与定点,通常是状态转折点相交时的特殊位置. 3. 分段画图,选择适当方法表达面积. 二、精讲精练 1. 已知,等边三角形ABC 的边长为4厘米,长为1厘米的线段MN 在△ABC 的边AB 上,沿AB 方向以1 厘米/秒的速度向B 点运动(运动开始时,点M 与点A 重合,点N 到达点B 时运动终止),过点M 、N 分别作AB 边的垂线,与△ABC 的其他边交于P 、Q 两点,线段MN 运动的时间为t 秒. (1)线段MN 在运动的过程中,t 为何值时,四边形MNQP 恰为矩形并求出该矩形的面积. (2)线段MN 在运动的过程中,四边形MNQP 的面积为S ,运动的时间为t .求四边形MNQP 的面积S 随运动时间t 变化的函数关系式,并写出自变量t 的取值范围. 1题图 2题图 2. 如图,等腰梯形ABCD 中,AB ∥CD ,AB = CD 高CE =,对角线AC 、BD 交于点H .平 行于线段BD 的两条直线MN 、RQ 同时从点A 出发,沿AC 方向向点C 匀速平移,分别交等腰梯形ABCD 的边于M 、N 和R 、Q ,分别交对角线AC 于F 、G ,当直线RQ 到达点C 时,两直线同时停止移动.记 等腰梯形ABCD 被直线MN 扫过的面积为1S ,被直线RQ 扫过的面积为2S ,若直线MN 平移的速度为1单位/秒,直线RQ 平移的速度为2单位/秒,设两直线移动的时间为x 秒. (1)填空:∠AHB =____________;AC =_____________; (2)若213S S ,求x . 3. 如图,△ABC 中,∠C =90°,AC =8cm ,BC =6cm ,点P 、Q 同时从点C 出发,以1cm/s 的速度分别沿CA 、 CB 匀速运动,当点Q 到达点B 时,点P 、Q 同时停止运动.过点P 作AC 的垂线l 交AB 于点R ,连接PQ 、RQ ,并作△PQR 关于直线l 对称的图形,得到△PQ'R .设点Q 的运动时间为t (s ),△PQ'R 与△PAR 重叠部分的面积为S (cm 2). (1)t 为何值时,点Q' 恰好落在AB 上 (2)求S 与t 的函数关系式,并写出t 的取值范围. (3)S 能否为9 8 若能,求出此时t 的值; 若不能,请说明理由. C B A B C P R Q Q' l A C M N Q P B C H D C B A A B C H H D C B A A B C D M N R Q F G H E H D C B A H D C B A

相关文档
最新文档