New黄冈市2018年中考英语模拟试卷(附听力材料 参考答案)

New黄冈市2018年中考英语模拟试卷(附听力材料 参考答案)
New黄冈市2018年中考英语模拟试卷(附听力材料 参考答案)

黄冈市2018年中考英语模拟试题

第I卷(选择题88分)

一、听力测试(共三节;计25分)

第一节(共5小题;每小题1分,满分5分)

听句子。从每小题所给的A、B、C三个选项中,选出与所听句子内容相符的图片。听完每个句子后,你将有5秒钟的时间作答和阅读下一小题。每个句子读两遍。

1. A B C

2.

3.

4.

5.

第二节(共15小题;每小题1分,满分15分)

听下面6段对话。每段对话后面有几个小题,从题后所给的A、B、C三个选项中选出最佳选项。听每段对话前,你将有10秒钟读题时间;听完每段对话后,你将有10秒钟的作答时间。每段对话读两遍。

听第6段材料,完成第6至7小题。

6. Who comes from America?

A. Alice.

B. Tony. B. Tony’s parents.

7. Where did Tony come five years ago?

A. Australia.

B. America.

C. China.

听第7段材料,完成第8至9小题。

8. How many tigers are there now?

A. About 200.

B. About 300.

C. About 400.

9. What should we do to save tigers?

A. Make more money for tigers.

B. Build a pleasant home for tigers.

C. Wait for the government to do something.

听第8段材料,完成第10至11小题。

10.How often does the woman go to the dentist?

A. Once a year.

B. Twice a year.

C. Three times a year.

11.Why doesn’t the woman want to see the dentist?

A. Because she is too busy.

B. Because she doesn’t like the pain.

C. Because her teeth are good enough now.

听第9段材料,完成第12至14小题。

12. What do Eric’s classmates think of the Alice in Wonderland?

A. Interesting.

B. Exciting.

C. Educational.

13. Where does Sally want to go tomorrow morning?

A. To the market.

B. To the library.

C. To the bookstore.

14. What’s the weather like tomorrow morning?

A. Sunny.

B. Rainy.

C. Cloudy.

听第10段材料,完成第15至17小题。

15. Who is the woman?

A. Mr. Smith’s student.

B. Mr. Smith’s daughter.

C. Mr. Smith’s wife.

16. Where is Jack Brown from?

A. A university.

B. A middle school.

C. A primary school.

17. What does Jack Brown ask Mr. Smith to do for his students?

A. To tell them how to draw.

B. To teach them Chinese.

C. To give them a speech.

听第11段材料,完成第18至20小题。

18. How long has Peter been in China?

A. Three days.

B. One week.

C. Two weeks.

19. How many places of China has he been to?

A. The Great Wall, the Bird’s net and Wu Han.

B. The Great Wall, the Bird’s net and Xi’an.

C. The Great Wall, the Summer Palace and Terracotta Army.

20. What does Peter think of Beijing Duck?

A. Expensive.

B. Delicious.

C. Terrible.

第三节(共5小题;每小题1分,满分5分)

听下面一篇短文。根据你所听到的短文内容,选择能回答所提问题的最佳答案。听短文前,你将有25秒钟的读题时间;听短文后,你将有25秒钟的作答时间。短文读两遍。

听第12段材料,完成第21至25小题。

21. Who gave Tom one dollar at first?

A. His mother.

B. His father.

C. The old man.

22. What happened when Tom went to buy a toy?

A. James was hit badly by snowballs.

B. Tom met an old man and helped him.

C. Tom broke a window of the house.

23. Why did Tom go back to the house? Because he wanted to .

A. play snowballs again

B. pay for the window

C. get his toy back

24. How much money did Tom get at last?

A. Two dollars.

B. One dollar.

C. Nothing.

25. What does the story want to tell us?

A. Working hard is very important.

B. Helping others is to help ourselves.

C. Being honest can bring us more.

二、单项选择(共10小题;每小题1 分,满分10分)

从A、B、C、D 四个选项中,选出可以填入空白处的最佳选项。

26. —Could you make a/an ________ for the basketball game?

—Sure! I am sure The Rockets will beat The Warriors.

A. decision

B. plan

C. prediction

D. idea

27. —Who teach _______ English, Liu Mei?

—Miss He. She often makes _____ class very interesting.

A. your, her

B. you, hers

C. your, hers

D. you, her

28. —I’m sorry this dress is a bit large. Could you give me a ____________ one?

—OK! Here you are!

A. small

B. bigger

C. smaller

D. big

29. —I called you so many times last time. Why didn’t you pick up?

—Sorry! I was watching The ReadersⅡ______the bell was ringing.

A. when

B. while

C. since

D. after

30. —Baby, could you help me ________ the carrots?

—No problem! I’ll do it right now.

A. cut out

B. cut off

C. cut down

D. cut up

31.—Your smartphone looks a little old. Why not buy a new one?

—Really? I _______________ it for only two years!

A. have had

B. bought

C. have bought

D. will have

32. —Teenagers should_________ to take their smartphones to school, I think.

—You are right! They will spend less time on their schoolwork.

A. be allowed

B. allow

C. not be allowed

D. not allow

33. —Tomorrow is my mother’s birthday! What gift should I choose for her?

—Why don’t you buy her a scarf _____________ silk.

A. which is made in

B. that is made by

C. which is made of

D. that is made in

34. —Could you tell me ____________the dress just now? You have no money in your pocket!

—So easy! Through Wechat-pay.

A. when you bought

B. where did you bought

C. what you bought

D. how you bought

35. — I am taking my mid-term exam today. I feel a little nervous.

—___________.

A. Take it easy.

B. Good luck

C. D on’t be too hard on you!

D. It’s a piece of cake.

三、完形填空。(15小题,每小题1分,共15分)

阅读下面短文,从短文后所给的四个选项中,选出可以填入空白处的最佳选项。

One day, the students of Class 6 were reading in the classroom. Mrs. Brown came in and told the whole class that they would have to change 36 in March. The naughtiest (调皮的) class in the grade could not 37 it. The pupils all disagreed with the decision, so they shouted when Mrs. Brown said it was because a new pupil would be 38 the class. The class was in disorder (混乱). “Why must we move to another classroom just because someone new is coming?” one of them asked 39 . Mrs. Brown waited patiently before the class without saying anything. The students saw it and they became quiet. Mrs. Brown told them to be 40 their new classmate and then she left.

The following week, the class understood 41 . The principal (校长) himself brought the new student to their class. 42 , Mr. White pushed (推着) the new student to the class because the student was in a

wheelchair (轮椅). Mr. White 43 the new student as Jeff and asked them to be friendly to him. He said that Jeff now was a 44 of the class and they should work together. He added, “A house divided (分开) against itself cannot stand.” 45 could fully understand what Mr. White meant at first.

Over time, they began to understand what their principal meant. Jeff was a 46 student and often lent a helping hand to students who did not understand 47 work. They felt very thankful to him. They took turns to wheel him about (推他转转) 48 they knew well that when someone did something for you, you 49 do something back in return (回报). Not only did their results (成绩) 50 , but their behavior (行为) became better. It was a special year Class 6 would never forget.`

36. A. partner B. lesson C. teacher D. classroom

37. A. try B. catch C. believe D. manage

38. A. leading B. helping C. visiting D. joining

39. A. sadly B. angrily C. seriously D. coldly

40. A. nice B. useful C. honest D. careful

41. A. why B. where C. when D. how

42. A. So far B. Above all C. As usual D. In fact

43. A. mistook B. described C. introduced D. remembered

44. A. hope B. member C. monitor D. symbol

45. A. Nobody B. Somebody C. Anybody D. Everybody

46. A. lucky B. strict C. funny D. clever

47. A. his B. her C. their D. our

48. A. if B. because C. until D. though

49. A. should B. could C. might D. would

50. A. appear B. develop C. improve D. continue

四、阅读理解(每小题2分,满分38分)

第一节阅读下面三篇短文,根据短文内容,从所给的A、B、C、D 四个选项中选出最佳选项。(共14 小题;每小题 2 分,满分28分)

(1)

Celebrating Chinese New Year with Chinese friends can be great, but, when the cultural gap is large, it can be really easy to give the wrong gifts for Chinese New Year.

◆Sharp Objects — Cut Off Relationship

Giving somebody a sharp(锋利的) object insinuates(暗示)that you want to cut off your relationship with them. A common Chinese saying goes "one slash and it’s in two parts" to mean the end of a relationship between people.

◆Shoes — Evil

Shoes are a bad idea for a present for Chinese New Year because the word for ’shoes’ (xié) sounds exactly like a wo rd for bad luck or ’evil’ (邪xié). And shoes are something that you step on. So, try to avoid shoes !

◆Clocks — Bad Luck

In Chinese, saying ’giving a clock’ (sòng zhōng /song jong/) sounds exactly like the Chinese words for ’attending a funeral ritual(葬礼) and it is bad luck to gift clocks or watches.

◆Pears — Parting

Giving fruit is a good thing, but pears are taboo(忌讳). This is because the Chinese word for ’pears’ (lí /lee/) sounds the same as the word for leaving or ’parting’ (离lí).

◆Umbrellas — Break Up

Umbrellas are a bad idea to give as gifts, because the Chinese word for ’umbrella’ (伞sǎn

/san/) sound like the word for ’breaking up’ (散sàn). Giving somebody an umbrella may

insinuate that you feel your relationship with them has fallen apart.

51. How many kinds of gifts are mentioned in the passage?

A. 2

B. 3

C. 4

D. 5

52. What does “one slash and it’s in two parts”mean in Chinese?

A. 一见钟情

B. 一生一世

C. 一刀两断

D. 一塌糊涂

53. If you go to visit your friends, what are the wrong gifts that you can’t give?

A. Apples.

B. Cakes.

C. Pears.

D. Books.

54. Which of the following is the best title of the passage?

A. Don’t drop by your friends.

B. Choose the proper gifts.

C. How to visit your friends.

D. When to send gifts.

(2)

●There was an old man in the State of Song who had an impatient disposition(急性子). Day and night he hoped that the seedlings(幼苗) in the field would grow tall and strong quickly. But the seedlings grew very slowly, not as quickly as he wished.

One day, he hit upon a good idea. He went to the field and pulled each seedling up a little bit from the soil. Seeing that all these seedlings in the field were taller than before, he felt very pleased with himself.

He went home. Though all worn out, he told the members of his family happily: "I worked for a whole day today. How tired I am! But the seedlings in the field have grown a lot taller."

When his son heard that the seedlings had grown taller, he hurried to the field to take a look.

Oh, what a mess! Instead of growing taller, the seedlings had all started to wither.

●Once upon a time, a young man saw a doorbell hanging from someone's door and wanted to steal it. But he knew that if he were to steal the bell, it would start ringing the moment his hand touched it. If he were discovered, not only he couldn't get the bell, but he himself might also be caught.

He thought this over and said to himself: "Why will there be trouble when a bell rings? This is because our ears can hear it. If I cover my ears, I won't be able to hear it. This way I won't be caught."

Later, he got an idea. He first covered his own ears, then went on to steal the bell.

However, in the end he was still discovered and caught red-handed.

55. Why did the old man worry about the seedlings in his field?

A. The seedlings grew a lot taller.

B. The seedlings were going to die.

C. The seedlings grew very slowly.

D. The seedlings grew very quickly.

56. What does the word “wither”mean in Chinese?

A. 旺盛

B. 枯萎

C. 停止

D. 发育

57. How did the young man get the doorbell?

A. He stole the doorbell without permission.

B. He got the doorbell with someone’s help.

C. He didn’t get an idea of stealing the doorbell.

D. He covered his ears to steal the doorbell.

58. What happened to the young man at last?

A. He stole the doorbell successfully.

B. He gave up stealing the doorbell.

C. He failed to steal the doorbell.

D. He was not caught red-handed.

59. Which of the following is NOT Right according to the fables?

A. Seedlings, like men, need to grow naturally.

B. The old man was very good at farming.

C. People can't do things that deceive(欺诈) themselves.

D. The meaning of the second fable is self-deception.

(3)

Babies born after 2017 may never need to take a driving lesson because of the development of selfdriving cars. Some scientists say that selfdriving or driverless cars may hit the road within 15 years, and it is possible that driving may become unnecessary, or more relaxing and enjoyable.

Companies like Google, Baidu, Apple and Alibaba are working on driverless cars. But, if the tests are

successful, these electric selfdriving cars could be put into use very soon. This kind of cars may change the way we live in the future. All you have to do is typing in your address!

According to Baidu, the driverless technology has the following four advantages. Firstly, driverless cars are actually safer. In China, there are more than 500 deaths caused by accidents.

With driverless cars, the number will decrease by 100 times. Secondly, driverless cars are more efficient(有效的) than manned cars. Thirdly, driverless cars follow the traffic rules. Therefore,

traffic controlling will be easier. At last, the cost of transportation will be reduced as the labor cost becomes less.

There are many different technologies needed to make a successful selfdriving car. The most difficult technologies of all are environmental perception (感知), behavior prediction, planning control, HD mapping, and exact GPS.

60. According to some scientists, driverless cars may make driving become_________.

A. necessary

B. difficult

C. enjoyable

D. boring

61. Which of the following is NOT TRUE about driverless cars?

A. Google, Baidu, Apple and Alibaba are working on driverless cars.

B. This kind of cars may change our living conditions in the future.

C. Driverless cars are safer than mancontrolled cars.

D. Passengers don’t need to tell the cars where they want to go.

62. The third paragraph mainly talks about the_________of driverless cars.

A. instructions

B. standards

C. advantages

D. theories

63. What does the underlined word “decrease” in the third paragraph mean?

A. 减少

B. 增加

C. 培养

D. 建造

64. What can we learn from the passage?

A. Driverless cars may not follow the traffic rules.

B. The technologies for driverless cars haven’t yet well developed.

C. The communication between the car and a man is perfect.

D. Driverless cars will have more accidents than mancontrolled cars.

第二节阅读还原(本题共5小题,每小题2分,满分10分)

阅读下面的短文,根据短文内容,从短文后的选项中选出能填入文中空白处的最佳选项。

(提示:每个选项只用一次,选项中有一项为多余选项)

One young person went for a job interview as a manager in a big company. The president found the young man’s college grades were excellent and felt satisfied. 65 The young man told him that his mother did it and she made a living by washing clothes.

66 Then he asked, “Have you ever helped your mother wash the clothes before?” The young man answered, “Never, my mother always wants me to study.” “Go and clean your mother’s hands when you go back today, and then see me tomorrow morning,” the president said at last.

The young man went back, and he requested his mother to let him clean her hands. 67

68 It was the first time that he had noticed his mother’s hands were so wrinkled (布满皱纹的). After that, the young man didn’t say a word and washed all the remaining clothes for his mother. That night, the mother and son talked for a very long time, longer than any talk before.

The next morning, the young man went to the president’s office. 69 He asked, “Please tell me how you felt about helping your mother.” The youth said, “Number One, I know n ow what value is. Without my mother, I wouldn’t be successful today. Number Two, by helping my mother, I realize how difficult it is to get something done. Number Three, I’ve come to realize the value of family relationship.” The president said, “You can g et the job. This is what I’m looking for to be my manager.”

2017年湖北省黄冈市中考数学试题及解析

2017年湖北省黄冈市中考数学试卷 一、选择题(共7小题,每小题3分,满分21分) ± 3.(3分)(2017?黄冈)如图所示,该几何体的俯视图是() B 有意义的 的值等于 5.(3分)(2017?黄冈)如图,a∥b,∠1=∠2,∠3=40°,则∠4等于() 6.(3分)(2017?黄冈)如图,在△ABC中,∠C=Rt∠,∠B=30°,边AB的垂直平分线DE交AB于点E,交BC于点D,CD=3,则BC的长为()

7.(3分)(2017?黄冈)货车和小汽车同时从甲地出发,以各自的速度匀速向乙地行驶,小汽车到达乙地后,立即以相同的速度沿原路返回甲地,已知甲、乙两地相距180千米,货车的速度为60千米/小时,小汽车的速度为90千米/小时,则下图中能分别反映出货车、小汽 ..C.. 二、填空题(共7小题,每小题3分,满分21分) 8.(3分)(2017?黄冈)计算:=. 9.(3分)(2017?黄冈)分解因式:x3﹣2x2+x=. 10.(3分)(2017?黄冈)若方程x2﹣2x﹣1=0的两根分别为x1,x2,则x1+x2﹣x1x2的值为. 11.(3分)(2017?黄冈)计算÷(1﹣)的结果是. 12.(3分)(2017?黄冈)如图,在正方形ABCD中,点F为CD上一点,BF与AC交于点E.若∠CBF=20°,则∠AED等于度. 13.(3分)(2017?黄冈)如图所示的扇形是一个圆锥的侧面展开图,若∠AOB=120°,弧AB的长为12πcm,则该圆锥的侧面积为cm2.

14.(3分)(2017?黄冈)在△ABC中,AB=13cm,AC=20cm,BC边上的高为12cm,则△ABC 的面积为cm2. 三、解答题(共10小题,满分78分) 15.(5分)(2017?黄冈)解不等式组:. 16.(6分)(2017?黄冈)已知A,B两件服装的成本共500元,鑫洋服装店老板分别以30%和20%的利润率定价后进行销售,该服装店共获利130元,问A,B两件服装的成本各是多少元? 17.(6分)(2017?黄冈)已知:如图,在四边形ABCD中,AB∥CD,E,F为对角线AC 上两点,且AE=CF,DF∥BE. 求证:四边形ABCD为平行四边形. 18.(7分)(2017?黄冈)在某电视台的一档选秀节目中,有三位评委,每位评委在选手完成才艺表演后,出示“通过”(用√表示)或“淘汰”(用×表示)的评定结果,节目组规定:每位选手至少获得两位评委的“通过”才能晋级 (1)请用树形图列举出选手A获得三位评委评定的各种可能的结果; (2)求选手A晋级的概率. 19.(7分)(2017?黄冈)“六一”儿童节前夕,薪黄县教育局准备给留守儿童赠送一批学习用品,先对浠泉镇浠泉小学的留守儿童人数进行抽样统计,发现各班留守儿童人数分别为6名,7名,8名,10名,12名这五种情形,并将统计结果绘制成了如图所示的两份不完整的统计图:

2019年湖北省黄冈市中考数学试卷

2019年湖北省黄冈市中考数学试卷 一、选择题(本题共8小题,每小题3分,共24分,每小题给出的4个选项中,有且只有一个答案是正确的) 1.(3分)(2019?黄冈)﹣3的绝对值是() A.﹣3 B.C.3 D.±3 2.(3分)(2019?黄冈)为纪念中华人民共和国成立70周年,我市各中小学积极开展了以“祖国在我心中”为主题的各类教育活动,全市约有550000名中小学生参加,其中数据550000用科学记数法表示为() A.5.5×106 B.5.5×105 C.55×104 D.0.55×106 3.(3分)(2019?黄冈)下列运算正确的是() A.a?a2=a2 B.5a?5b=5ab C.a5÷a3=a2 D.2a+3b=5ab 4.(3分)(2019?黄冈)若x1,x2是一元二次方程x2﹣4x﹣5=0的两根,则x1?x2的值为() A.﹣5 B.5 C.﹣4 D.4 5.(3分)(2019?黄冈)已知点A的坐标为(2,1),将点A向下平移4个单位长度,得到的点A′的坐标是() A.(6,1)B.(﹣2,1)C.(2,5)D.(2,﹣3)6.(3分)(2019?黄冈)如图,是由棱长都相等的四个小正方体组成的几何体.该几何体的左视图是() A.B.C.D. 7.(3分)(2019?黄冈)如图,一条公路的转弯处是一段圆弧(),点O是这段弧所在圆的圆心,AB=40m,点C是的中点,且CD=10m,则这段弯路所在圆的半径为()

A.25m B.24m C.30m D.60m 8.(3分)(2019?黄冈)已知林茂的家、体育场、文具店在同一直线上,图中的信息反映的过程是:林茂从家跑步去体育场,在体育场锻炼了一阵后又走到文具店买笔,然后再走回家.图中x表示时间,y表示林茂离家的距离.依据图中的信息,下列说法错误的是() A.体育场离林茂家2.5km B.体育场离文具店1km C.林茂从体育场出发到文具店的平均速度是50m/min D.林茂从文具店回家的平均速度是60m/min 二、填空题(本题共8小题,每小题3分,共24分) 9.(3分)(2019?黄冈)计算()2+1的结果是. 10.(3分)(2019?黄冈)x2y是次单项式. 11.(3分)(2019?黄冈)分解因式3x2﹣27y2=. 12.(3分)(2019?黄冈)一组数据1,7,8,5,4的中位数是a,则a的值是.13.(3分)(2019?黄冈)如图,直线AB∥CD,直线EC分别与AB,CD相交于点 A、点C,AD平分∠BAC,已知∠ACD=80°,则∠DAC的度数为. 14.(3分)(2019?黄冈)用一个圆心角为120°,半径为6的扇形做一个圆锥

2020年湖北黄冈市中考数学试题(word版)

2020年湖北黄冈市中考数学试题(word 版) 黄冈市2018年初中毕业生升学考试 数 学 试 题 〔考试时刻120分钟 总分值120分〕 _______________________________________________________________________________ 本卷须知: 1.答卷前,考生务必将自己的姓名、准考证号填写在试题卷和答题卷上,并将准考证号条形码粘贴在答题卷上的指定位置。 2.选择题每题选出答案后,用2B 铅笔把答题卷上对应题目的答案号涂黑。如需改动,用像皮擦洁净后,再选涂其他答案标号。答在试题卷上无效。 3.非选择题用0.5毫米黑色的签字笔或黑色墨水钢笔直截了当答在答题卷上。答在试题卷上无效。 4.考试终止,监考人员将本试题卷和答题卷一并收回。 一、选择题〔A ,B ,C ,D 四个答案中,有且只有一个是正确的,每题3分,总分值18分〕 1.8的立方根为〔 〕 A .2 B .±2 C .4 D .±4 2.以下运算正确的选项是〔 〕 A .336a a a += B .2()2a b a b +=+ C .22()ab ab --= D .624a a a ÷= 3.如图,△ABC 与△A`B`C`关于直线l 对称,且∠A =78°,∠C`=48°,那么∠B 的度数为〔 〕 A .48° B .54° C .74° D .78° 4.化简24()22a a a a a a ---+的结果是〔 〕 A .-4 B .4 C .2a D .-2a 5.一个多边形的内角和是外角和的2倍,那么那个多边 形的边数为〔 〕 A .4 B .5 C .6 D .7 6.小高从家门口骑车去单位上班,先走平路到达点 A ,再走上坡路到达点 B ,最后走下坡路到达工作 单位,所用的时刻与路程的关系如下图.下班后, 假如他沿原路返回,且走平路、上坡路、下坡路 的速度分不保持和去上班时一致,那么他从单位 到家门口需要的时刻是〔 〕 A .12分钟 B .15分钟 C .25分钟 D .27分钟

2020年黄冈市中考数学试卷

黄冈市中考数学试卷 ( 总分:120 时间:120分钟 ) 一、选择题(每小题3分,共21分) 1.下列各数中,最小的数是 ( ) (A). 0 (B). 13 (C).-1 3 (D).-3 2.下面是一个正方体被截去一个直三棱柱得到的几何体,则该几何体的左视图是( ) 3. 据统计,省旅游业总收入达到3875.5亿元.若将3875.5亿用科学计数法表示为3.8755× 10n ,则n 等于 ( ) (A) 10 (B) 11 (C).12 (D).13 4.小军旅行箱的密码是一个六位数,由于他忘记了密码的末位数字,则小军能一次打开该旅行箱的概率是( ) A . 101 B. 91 C. 61 D. 5 1 5.下列图形中,不是中心对称图形的是( ). 6.将抛物线y=-2x 2+1向右平移l 个单位,再向上平移2个单位 后所得到的抛物线为( ). (A)y=-2(x+1)2-1 (B)y=-2(x+1)2+3 (C)y=-2(x-1)2-1 (D)y=-2(x-1)2+3 7.如图,AB 是⊙0的直径,AC 是⊙0的切线,连接0C 交⊙0于 点D ,连接BD ,∠C=400,则∠ABD 的度数是( ). (A)30° (B)25° (C)20° (D)15° 二、填空题(共21分) 8.函数2 1y x x =+中,自变量x 的取值范围是 。 9.因式分解:x 2 y -y= .

10.不等式组 ? ? ? - ≥ + 1 x 3 x 2 - > 的解集是 . 11、《庄子。天下篇》中写道:“一尺之棰,日取其半,万世不竭”意思是:一根一尺的木棍,如果每天截取它的一半,永远也取不完,如图所示。 1 23 1 22 1 2 1 由图易得: 23 1111 ....... 2222n ++++= 12.(2014年山东烟台)如图,正六边形ABCDEF内接于⊙O,若⊙O的半径为4,则阴影部分的面积等于. 13.已知一次函数y ax b =+与反比例函数 k y x =的图象相较于A(4,2)、B(-2,m)两点,则一次函数的表达式为。 14.如图在坐标系中放置一菱形OABC,已知∠ABC=60,OA=1.先将菱形OABC沿x轴的正方向无滑动翻转,每(第14题图)次翻转60°, 连续翻转2014次,点B的落点一次为B1,B2,B3,……, 则B2014的坐标为。 三、解答题 15. (本题满分5分) 先化简,再求值: 2 4512 1 11 a a a a a a - ???? +-÷- ? ? --- ???? ,其中a=-1. (第14题图)

2018年湖北省黄冈市中考数学试卷+答案

2018年湖北省黄冈市中考数学试卷 一、选择题(本题共6小题,每小题3分,共18分.每小题给出的4个选项中,有且只有一个案是正确的) 1.(3分)(2018?黄冈)﹣2 3 的相反数是( ) A .﹣32 B .﹣23 C .23 D .32 2.(3分)(2018?黄冈)下列运算结果正确的是( ) A .3a 3?2a 2=6a 6 B .(﹣2a )2=﹣4a 2 C .tan45°=√22 D .cos30°=√3 2 3.(3分)(2018?黄冈)函数y=√x+1 x?1 中自变量x 的取值范围是( ) A .x ≥﹣1且x ≠1 B .x ≥﹣1 C .x ≠1 D .﹣1≤x <1 4.(3分)(2018?黄冈)如图,在△ABC 中,DE 是AC 的垂直平分线,且分别交BC ,AC 于点D 和E ,∠B=60°,∠C=25°,则∠BAD 为( ) A .50° B .70° C .75° D .80° 5.(3分)(2018?黄冈)如图,在Rt △ABC 中,∠ACB=90°,CD 为AB 边上的高,CE 为AB 边上的中线,AD=2,CE=5,则CD=( ) A .2 B .3 C .4 D .2√3 6.(3分)(2018?黄冈)当a ≤x ≤a +1时,函数y=x 2﹣2x +1的最小值为1,则a 的值为( ) A .﹣1 B .2 C .0或2 D .﹣1或2 二、填空题(本题共8小题,每题小3分,共24分 7.(3分)(2018?黄冈)实数16800000用科学记数法表示为 . 8.(3分)(2018?黄冈)因式分解:x 3﹣9x= . 9.(3分)(2018?黄冈)化简(√2﹣1)0+( 12 )﹣2﹣√9+√?273 = . 10.(3分)(2018?黄冈)则a ﹣1a =√6,则a 2+1a 2值为 . 11.(3分)(2018?黄冈)如图,△ABC 内接于⊙O ,AB 为⊙O 的直径,∠CAB=60°,弦AD 平分∠CAB ,若AD=6,则AC= . 12.(3分)(2018?黄冈)一个三角形的两边长分别为3和6,第三边长是方程x 2﹣10x +21=0的根,则三角形的周长为 . 13.(3分)(2018?黄冈)如图,圆柱形玻璃杯高为14cm ,底面周长为32cm ,在杯内壁离杯底5cm 的点B 处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿3cm 与蜂蜜相对的点A 处,则蚂蚁从外壁A 处到内壁B 处的最短距离为 cm (杯壁厚度不计). 14.(3分)(2018?黄冈)在﹣4、﹣2,1、2四个数中、随机取两个数分别作为函数y=ax 2+bx +1中a ,b 的值,则该二次函数图象恰好经过第一、二、四象限的概率为 . 三、解答题(本题共10题,满分78分(x-2)≤8 15.(5分)(2018?黄冈)求满足不等式组{x ?3(x ?2)≤812x ?1<3?32x 的所有整数解.

2020年黄冈市中考数学试题及答案

黄冈市2020年初中毕业生学业水平考试 数学试题 (考试时间120分钟 满分120分) 一、填空题(共8道题,每小题3分,共24分) 1.1 2 - 的倒数是________. 2.分解因式8a 2-2=____________________________. 3. 要使式子 a 有意义,则a 的取值范围为_____________________. 4.如图:点A 在双曲线k y x = 上,AB ⊥x 轴于B ,且△AOB 的面积S △AOB =2,则k =______. 5.如图:矩形ABCD 的对角线AC =10,BC =8,则图中五个小矩形的周长之和为_______. 6.如图,在△ABC 中E 是BC 上的一点,EC =2BE ,点D 是AC 的中点,设△ABC 、△ADF 、 △BEF 的面积分别为S △ABC ,S △ADF ,S △BEF ,且S △ABC =12,则S △ADF -S △BEF =_________. 7.若关于x ,y 的二元一次方程组3133 x y a x y +=+?? +=?的 解满足2x y +<,则a 的取值范围为______. 8.如图,△ABC 的外角∠ACD 的平分线CP 的内角 ∠ABC 平分线BP 交于点P ,若∠BPC =40°,则∠CAP =_______________. 二、选择题(A ,B ,C ,D 四个答案中,有且只有一个是正确的,每小题3分,共21分) 9.cos 30°= A . 12 B . 2 C D 10.计算()2 2 1 222 -+---1 (-) 第4题图 A B C D 第5 题图 第5题图 B C E 第8题图

2020年湖北省黄冈市中考数学试卷

2020年湖北省黄冈市中考数学试卷 一、选择题(本题共8小题,每小题3分,共24分.每小题给出的4个选项中,有且只有一个答案是正确的) 1.(3分)的相反数是() A.B.﹣6C.6D.﹣ 2.(3分)下列运算正确的是() A.m+2m=3m2B.2m3?3m2=6m6 C.(2m)3=8m3D.m6÷m2=m3 3.(3分)已知一个正多边形的一个外角为36°,则这个正多边形的边数是()A.7B.8C.9D.10 4.(3分)甲、乙、丙、丁四位同学五次数学测验成绩统计如下表所示,如果从这四位同学中,选出一位同学参加数学竞赛.那么应选()去. 甲乙丙丁 平均分85909085 方差50425042 A.甲B.乙C.丙D.丁 5.(3分)下列几何体是由4个相同的小正方体搭成的,其中,主视图、左视图、俯视图都相同的是() A.B. C.D. 6.(3分)在平面直角坐标系中,若点A(a,﹣b)在第三象限,则点B(﹣ab,b)所在的象限是() A.第一象限B.第二象限C.第三象限D.第四象限7.(3分)若菱形的周长为16,高为2,则菱形两邻角的度数之比为()A.4:1B.5:1C.6:1D.7:1

8.(3分)2020年初以来,红星消毒液公司生产的消毒液在库存量为m吨的情况下,日销售量与产量持平.自1月底抗击“新冠病毒”以来,消毒液需求量猛增,该厂在生产能力不变的情况下,消毒液一度脱销,下面表示2020年初至脱销期间,该厂库存量y(吨)与时间t(天)之间函数关系的大致图象是() A.B. C.D. 二、填空题(本题共8小题,每小题3分,共24分) 9.(3分)计算=. 10.(3分)已知x1,x2是一元二次方程x2﹣2x﹣1=0的两根,则=.11.(3分)若|x﹣2|+=0,则﹣xy=. 12.(3分)已知:如图,在△ABC中,点D在边BC上,AB=AD=DC,∠C=35°,则∠BAD=度. 13.(3分)计算:÷(1﹣)的结果是. 14.(3分)已知:如图,AB∥EF,∠ABC=75°,∠CDF=135°,则∠BCD=度.

湖北省黄冈市2020年中考数学试卷及试题详解(WORD版)

第一部分:湖北省黄冈市2020年中考数学试题(1-8) 第二部分:湖北省黄冈市2020年中考数学试题详解(9-21) 一、选择题(本题共8小题,每小題3分,共24分.每小题给出的4个选项中,有且只有一个答案是正确的) 1. 1 6 的相反数是 ( ) A. 6 B. -6 C. 16 D. 16 - 2.下列运算正确的是( ) A. 223m m m += B. 326236m m m ?= C. 33(2)8m m = D. 623m m m ÷= 3.如果一个多边形的每一个外角都是36°,那么这个多边形的边数是( ) A. 7 B. 8 C. 9 D. 10 4.甲、乙、丙、丁四位同学五次数学测验成绩统计如右表所示,如果从这四位同学中,选出一位同学参加数学竞赛,那么应选___________去. 甲 乙 丙 丁 平均分 85 90 90 85 方差 50 42 50 42 A. 甲 B. 乙 C. 丙 D. 丁 5.下列几何体是由4个相同的小正方体搭成的,其中,主视图、左视图、俯视图都相同的是( ) A. B. C. D. 6.在平面直角坐标系中,若点(,)A a b -在第三象限,则点(,)B ab b -所在的象限是( ) A. 第一象限 B. 第二象限 C. 第三象限 D. 第四象限 7.若菱形的周长为16,高为2,则菱形两邻角的度数之比为( ) A. 4: 1 B. 5: 1 C. 6: 1 D. 7: 1 8.2020年初以来,红星消毒液公司生产的消毒液在库存量为m 吨的情况下,日销售量与产量持平,自1月底抗击“新冠病毒”以来,消毒液霱求量猛增,该厂在生产能力不变的情况下,消毒液一度脱销.下面表示

2018年湖北省黄冈市中考数学试卷含答案解析(Word版)

黄冈市 2018 年初中毕业生学业水平和高中阶段学校招生考试 数 学 试 题 (考试时间 120分钟 满分 120分) 第Ⅰ卷(选择题 共 18分) 一、选择题(本题共 6 小题,每小题 3 分,共 18 分。每小题给出 4 个选项中,有且只 有一个答案是正确的) 2 1. - 3 的相反数是 3 2 2 A. - 2 B. - C. D. 3 3 3 2 2. 下列运算结果正确的是 2 A. 3a 3·2a 2= 6a 6 B. (-2a)2= -4a 2 C. tan45°= 2 D. cos30°= 3 2 x 1 3.函数 y= x 1 中自变量 x 的取值范围是 A .x≥-1且 x≠1 B.x≥-1 C. x≠1 D. -1≤x <1 4.如图,在△ABC 中,DE 是 AC 的垂直平分线,且分别交 BC ,AC 于点 D 和 E ,∠B = 60°,∠C =25°,则∠BAD 为 A.50° B.70° C.75° D.80° (第 4 题图) 5.如图,在 Rt △ABC 中,∠ACB=90°,CD 为 AB 边上的高,CE 为 AB 边上的中线, AD=2,CE=5,则 CD= A.2 B.3 C.4 D.2 3

(第5 题图) 6.当a≤x≤a+1 时,函数y=x2-2x+1 的最小值为1,则a 的值为 A.-1 B.2 C.0 或2 D.-1 或2 第Ⅱ卷(非选择题共102分) 二、填空题(本题共8 小题,每小题3 分,共24 分) 7.实数16 800 000 用科学计数法表示为______________________. 8.因式分解:x3-9x=___________________________. 1 9.化简( 2-1)0+( )-2- 9+3 27=________________________. 2 1 1 10.若a- = ,则a2+ 值为_______________________. 6 a 2 a 11.如图,△ABC 内接于⊙O,AB 为⊙O 的直径,∠CAB=60°,弦AD平分∠CAB,若 AD=6,则AC=___________. (第11 题图) 12.一个三角形的两边长分别为3 和6,第三边长是方程x2-10x+21=0 的根,则三角形的周长为______________. 13.如图,圆柱形玻璃杯高为14cm,底面周长为32cm,在杯内壁离杯底5cm的点B处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿3cm与蜂蜜相对的点A处,则蚂蚁从外壁A处到内壁B处的最短距离为_________________cm(杯壁厚度不计).

湖北省黄冈市2018年中考数学试卷(含解析)

黄冈市2018年初中毕业生学业水平和高中阶段学校招生考试 数 学 试 题 (考试时间120分钟 满分120分) 第Ⅰ卷(选择题 共18分) 一、选择题(本题共6小题,每小题3分,共18分。每小题给出4个选项中,有且只有一个答案是正确的) 1. -32 的相反数是 A. -23 B. -32 C. 3 2 D. 2 3 2. 下列运算结果正确的是 A. 3a 3·2a 2=6a 6 B. (-2a)2= -4a 2 C. tan45°= 2 2 D. cos30°=2 3 3.函数y= 11 -+x x 中自变量x 的取值范围是 A .x ≥-1且x ≠1 B.x ≥-1 C. x ≠1 D. -1≤x <1 4.如图,在△ABC 中,DE 是AC 的垂直平分线,且分别交BC ,AC 于点D 和E ,∠B = 60°,∠C =25°,则∠BAD 为 A.50° B.70° C.75° D.80° (第4题图) 5.如图,在Rt △ABC 中,∠ACB=90°,CD 为AB 边上的高,CE 为AB 边上的中线, AD=2,CE=5,则CD= A.2 B.3 C.4 D.23

6.当a ≤x ≤a+1时,函数y=x 2-2x+1的最小值为1,则a 的值为 A.-1 B.2 C.0或2 D.-1或2 第Ⅱ卷(非选择题 共102分) 二、填空题(本题共8小题,每小题3分,共24分) 7.实数16 800 000用科学计数法表示为______________________. 8.因式分解:x 3-9x=___________________________. 9.化简(2-1)0+( 2 1)-2 -9+327 =________________________. 10.若a- a 1=6,则a 2+a 21 值为_______________________. 11.如图,△ABC 内接于⊙O ,AB 为⊙O 的直径,∠CAB=60°,弦AD 平分∠CAB ,若AD=6,则AC=___________. (第11题图) 12.一个三角形的两边长分别为3和6,第三边长是方程x 2-10x+21=0的根,则三角形的周长为______________. 13.如图,圆柱形玻璃杯高为14cm ,底面周长为32cm ,在杯内壁离杯底5cm 的点B 处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿3cm 与蜂蜜相对的点A 处,则蚂蚁从外壁A 处到内壁B 处的最短距离为_________________cm (杯壁厚度不计).

湖北省黄冈市2018年中考数学真题试题(含解析)含答案

湖北省黄冈市2018年中考数学真题试题 (考试时间120分钟 满分120分) 第Ⅰ卷(选择题 共18分) 一、选择题(本题共6小题,每小题3分,共18分。每小题给出4个选项中,有且只有一个答案是正确的) 1. -32 的相反数是 A. -23 B. -32 C. 32 D. 23 2. 下列运算结果正确的是 A. 3a 3 ·2a 2 =6a 6 B. (-2a)2 = -4a 2 C. tan45°=22 D. cos30°=23 3.函数y= 11 -+x x 中自变量x 的取值范围是 A .x ≥-1且x ≠1 B.x ≥-1 C. x ≠1 D. -1≤x <1 4.如图,在△ABC 中,DE 是AC 的垂直平分线,且分别交BC ,AC 于点D 和E ,∠B =60°,∠C =25°,则∠BAD 为 A.50° B.70° C.75° D.80° (第4题图) 5.如图,在Rt △ABC 中,∠ACB=90°,CD 为AB 边上的高,CE 为AB 边上的中线,AD=2,CE=5,则CD= A.2 B.3 C.4 D.23 (第5题图) 6.当a ≤x ≤a+1时,函数y=x 2 -2x+1的最小值为1,则a 的值为 A.-1 B.2 C.0或2 D.-1或2

第Ⅱ卷(非选择题 共102分) 二、填空题(本题共8小题,每小题3分,共24分) 7.实数16 800 000用科学计数法表示为______________________. 8.因式分解:x 3 -9x=___________________________. 9.化简(2-1)0 +( 2 1)-2 -9+327 =________________________. 10.若a- a 1=6,则a 2 +a 21值为_______________________. 11.如图,△ABC 内接于⊙O ,AB 为⊙O 的直径,∠CAB=60°,弦AD 平分∠CAB ,若AD=6,则AC=___________. (第11题图) 12.一个三角形的两边长分别为3和6,第三边长是方程x 2 -10x+21=0的根,则三角形的周长为______________. 13.如图,圆柱形玻璃杯高为14cm ,底面周长为32cm ,在杯内壁离杯底5cm 的点B 处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿3cm 与蜂蜜相对的点A 处,则蚂蚁从外壁A 处到内壁B 处的最短距离为_________________cm (杯壁厚度不计). (第13题图) 14. 在-4,-2,1,2四个数中,随机取两个数分别作为函数y=ax 2 +bx+1中a ,b 的值,则该二次函

2021年黄冈市中考数学测试卷

黄冈市中考数学模拟试卷 一、选择题(本大题共7个小题,在每小题给出的四个选项中,只有一项是符合题目要求的,共21分) 1、.下列运算中,正确的是() A.=±3 B. =2 C.(﹣2)0=0 D. 2﹣1= 2、甲队修路120m与乙队修路100m所用天数相同,已知甲队比乙队每天多修10m.设甲队每天修路xm,依题意,下面所列方程正确的是() A. =B.=C.=D.= 3、如图,淇淇和嘉嘉做数学游戏: 假设嘉嘉抽到牌的点数为x,淇淇猜中的结果应为y,则y=() A.2B.3C.6D.x+3 4、反比例函数y=的图象如图所示,以下结论: ①常数m<﹣1;②在每个象限内,y随x的增大而增大;③若A(﹣1,h),B(2,k)在图象上,则h<k; ④若P(x,y)在图象上,则P′(﹣x,﹣y)也在图象上.其中正确的是() A.①②B.②③C.③④D.①④ 5、如图1,M是铁丝AD的中点,将该铁丝首尾相接折成△ABC,且∠B=30°,∠C=100°,如图2.则下列说法正确的是() A.点M在AB上 B.点M在BC的中点处 C.点M在BC上,且距点B较近,距点C较远 D.点M在BC上,且距点C较近,距点B较远

6、如图,梯形ABCD中,AB∥DC,DE⊥AB,CF⊥AB,且AE=EF=FB=5,DE=12动点P从点A出发,沿折线AD﹣DC﹣CB以每秒1个单位长的速度运动到点B停止.设运动时间为t秒,y=S△EPF,则y与t的函数图象大致是() A.B.C.D. 7、如图,MN是半径为1的⊙O的直径,点A在⊙O上,∠AMN=30°,点B为劣弧AN的中点.点P是直径MN 上一动点,则PA+PB的最小值为() A.B.1C.2D.2 二、填空题(本大题共8个小题,每小题3分,共24分.把答案写在题中横线上) 8.若x+y=1,且x≠0,则(x+)÷的值为______. 9、已知a , b 是方程x2﹣x﹣3=0的两个根,则代数式2a3+b2+3a2﹣11a﹣b+5的值为 10、如图,A是正方体小木块(质地均匀)的一顶点,将木块随机投掷在水平桌面上,则A与桌面接触的概率是___________. 11、如图,四边形ABCD中,点M,N分别在AB,BC上,将△BMN沿MN翻折,得△FMN,若MF∥AD,FN∥DC,则∠B=____________. 12、.如图,菱形ABCD中,点M,N在AC上,ME⊥AD,NF⊥AB.若NF=NM=2,ME=3,则AN=________ 13、如图,PA,PB切⊙O于A、B两点,CD切⊙O于点E,交PA,PB于C,D.若⊙O的半径为r,△PCD的周长等于3r,则tan∠APB的值是__________. 14、.如图,一段抛物线:y=﹣x(x﹣3)(0≤x≤3),记为C1,它与x轴交于点O,A1; 将C1绕点A1旋转180°得C2,交x轴于点A2;

2019年黄冈中考数学试题(解析版)

{来源}2019黄冈市中考数学 {适用范围:3.九年级} {标题}黄冈市二〇一九年初中学业水平考试 考试时间:120分钟满分:150分 {题型:1-选择题}一、选择题:本大题共12 小题,每小题4 分,合计48分. 一、选择题(本题共8小题,每小题3分,共24分.每小题给出的4个选项中,有且只有一个答案是正确的){题目}1.-3的绝对值是 A.-3 B.-1 3 C.3 D.±3 {答案}C. {解析}本题考查了绝对值的概念,-3的绝对值是3. {分值}3 {章节:[1-1-2-3]相反数} {考点:相反数的定义} {类别:常考题} {难度:1-最简单} {题目}2.为纪念中华人民共和国成立70周年,我市各中小学积极开展了以“祖国在我心中”为主题的各类教育活动,全市约有550000名中小学生参加.其中数据550000用科学记数法表示为 A.5.5×106 B.5.5×105 C.55×104 D.0.55×106 {答案}B {解析}本题考查了科学计数法,科学技术法的形式为a×10n(1≤│a│<10),550000=5.5×105. {分值}3 {章节:[1-1-5-2]科学计数法} {考点:将一个绝对值较大的数科学计数法} {类别:常考题} {难度:1-最简单} {题目}3.下列运算正确的是 A.a·a2=a2 B.5a·5b=5ab C.a5÷a3=a2 D.2a+3b=5ab {答案}C {解析}本题考查了整式的运算,运算正确的选C. {分值}3 {章节:[1-14-1]整式的乘法} {考点:合并同类项} {考点:单项式乘以单项式} {考点:单项式除法} {类别:常考题} {难度:2-最简} {题目}4.若x1,x2是一元一次方程x2-4x-5=0的两根,则x1·x2的值为 A.-5 B.5 C.-4 D.4

2018年黄冈市中考数学试卷(含答案解析版)

2018年湖北省黄冈市中考数学试卷 一、选择题(本题共6小题,每小题3分,共18分.每小题给出的4个选项中,有且只有一个案是正确的) 1.(3分)(2018?黄冈)﹣2 3 的相反数是( ) A .﹣32 B .﹣23 C .23 D .32 2.(3分)(2018?黄冈)下列运算结果正确的是( ) A .3a 3?2a 2=6a 6 B .(﹣2a )2=﹣4a 2 C .tan45°=√22 D .cos30°=√32 3.(3分)(2018?黄冈)函数y=√x+1 x?1 中自变量x 的取值范围是( ) A .x ≥﹣1且x ≠1 B .x ≥﹣1 C .x ≠1 D .﹣1≤x <1 4.(3分)(2018?黄冈)如图,在△ABC 中,DE 是AC 的垂直平分线,且分别交BC ,AC 于点D 和E ,∠B=60°,∠C=25°,则∠BAD 为( ) A .50° B .70° C .75° D .80° 5.(3分)(2018?黄冈)如图,在Rt △ABC 中,∠ACB=90°,CD 为AB 边上的高,CE 为AB 边上的中线,AD=2,CE=5,则CD=( ) A .2 B .3 C .4 D .2√3 6.(3分)(2018?黄冈)当a ≤x ≤a +1时,函数y=x 2﹣2x +1的最小值为1,则a 的值为( ) A .﹣1 B .2 C .0或2 D .﹣1或2

二、填空题(本题共8小题,每题小3分,共24分 7.(3分)(2018?黄冈)实数16800000用科学记数法表示为 . 8.(3分)(2018?黄冈)因式分解:x 3﹣9x= . 9.(3分)(2018?黄冈)化简(√2﹣1)0+( 12 )﹣2﹣√9+√?273= . 10.(3分)(2018?黄冈)则a ﹣1a =√6,则a 2+1 a 2值为 . 11.(3分)(2018?黄冈)如图,△ABC 内接于⊙O ,AB 为⊙O 的直径,∠CAB=60°,弦AD 平分∠CAB ,若AD=6,则AC= . 12.(3分)(2018?黄冈)一个三角形的两边长分别为3和6,第三边长是方程x 2﹣10x +21=0的根,则三角形的周长为 . 13.(3分)(2018?黄冈)如图,圆柱形玻璃杯高为14cm ,底面周长为32cm ,在杯内壁离杯底5cm 的点B 处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿3cm 与蜂蜜相对的点A 处,则蚂蚁从外壁A 处到内壁B 处的最短距离为 cm (杯壁厚度不计). 14.(3分)(2018?黄冈)在﹣4、﹣2,1、2四个数中、随机取两个数分别作为函数y=ax 2+bx +1中a ,b 的值,则该二次函数图象恰好经过第一、二、四象限的概率为 . 三、解答题(本题共10题,满分78分(x -2)≤8 15.(5分)(2018?黄冈)求满足不等式组{x ?3(x ?2)≤8 12x ?1<3?32 x 的所有整数解.

2019年湖北省黄冈市中考数学试卷

1 / 22 2019年湖北省黄冈市中考数学试卷 一、选择题(本题共8小题,每小题3分,共24分,每小题给出的4个选项中,有且只有一个答案是正确的) 1.(3分)﹣3的绝对值是() A.﹣3B C.3D.±3 2.(3分)为纪念中华人民共和国成立70周年,我市各中小学积极开展了以“祖国在我心中”为主题的各类教育活动,全市约有550000名中小学生参加,其中数据550000用科学记数法表示为() A.5.5×106B.5.5×105C.55×104D.0.55×106 3.(3分)下列运算正确的是() A.a?a2=a2B.5a?5b=5ab C.a5÷a3=a2D.2a+3b=5ab 4.(3分)若x1,x2是一元二次方程x2﹣4x﹣5=0的两根,则x1?x2的值为()A.﹣5B.5C.﹣4D.4 5.(3分)已知点A的坐标为(2,1),将点A向下平移4个单位长度,得到的点A′的坐标是() A.(6,1)B.(﹣2,1)C.(2,5)D.(2,﹣3) 6.(3分)如图,是由棱长都相等的四个小正方体组成的几何体.该几何体的左视图是() A B C D 7.(3分)如图,一条公路的转弯处是一段圆弧(),点O是这段弧所在圆的圆心,AB=40m,点C是的中点,且CD=10m,则这段弯路所在圆的半径为() A.25m B.24m C.30m D.60m 8.(3分)已知林茂的家、体育场、文具店在同一直线上,图中的信息反映的过程是:林茂 2 / 22

从家跑步去体育场,在体育场锻炼了一阵后又走到文具店买笔,然后再走回家.图中x 表示时间,y表示林茂离家的距离.依据图中的信息,下列说法错误的是() A.体育场离林茂家2.5km B.体育场离文具店1km C.林茂从体育场出发到文具店的平均速度是50m/min D.林茂从文具店回家的平均速度是60m/min 二、填空题(本题共8小题,每小题3分,共24分) 9.(3分)计算()2+1的结果是 10.(3分)﹣x2y是次单项式. 11.(3分)分解因式3x2﹣27y2= 12.(3分)一组数据1,7,8,5,4的中位数是a,则a的值是 13.(3分)如图,直线AB∥CD,直线EC分别与AB,CD相交于点A、点C,AD平分∠BAC,已知∠ACD=80°,则∠DAC的度数为 14.(3分)用一个圆心角为120°,半径为6的扇形做一个圆锥的侧面,则这个圆锥的底面圆的面积为 15.(3分)如图,一直线经过原点O,且与反比例函数y=(k>0)相交于点A、点B,过点A作AC⊥y轴,垂足为C,连接BC.若△ABC面积为8,则k=

2018年湖北省黄冈市中考数学试卷及详细答案解析

2018年湖北省黄冈市中考数学试卷及答案 一、选择题(本题共6小题,每小题3分,共18分.每小题给出的4个选项中,有且只有一个案是正确的) 1.(3分)﹣的相反数是() A.﹣ B.﹣ C.D. 2.(3分)下列运算结果正确的是() A.3a3?2a2=6a6B.(﹣2a)2=﹣4a2C.tan45°=D.cos30°= 3.(3分)函数y=中自变量x的取值范围是() A.x≥﹣1且x≠1 B.x≥﹣1 C.x≠1 D.﹣1≤x<1 4.(3分)如图,在△ABC中,DE是AC的垂直平分线,且分别交BC,AC于点D 和E,∠B=60°,∠C=25°,则∠BAD为() A.50°B.70°C.75°D.80° 5.(3分)如图,在Rt△ABC中,∠ACB=90°,CD为AB边上的高,CE为AB边上的中线,AD=2,CE=5,则CD=() A.2 B.3 C.4 D.2 6.(3分)当a≤x≤a+1时,函数y=x2﹣2x+1的最小值为1,则a的值为()A.﹣1 B.2 C.0或2 D.﹣1或2 二、填空题(本题共8小题,每题小3分,共24分

7.(3分)实数16800000用科学记数法表示为. 8.(3分)因式分解:x3﹣9x=. 9.(3分)化简(﹣1)0+()﹣2﹣+=. 10.(3分)则a﹣=,则a2+值为. 11.(3分)如图,△ABC内接于⊙O,AB为⊙O的直径,∠CAB=60°,弦AD平分∠CAB,若AD=6,则AC=. 12.(3分)一个三角形的两边长分别为3和6,第三边长是方程x2﹣10x+21=0的根,则三角形的周长为. 13.(3分)如图,圆柱形玻璃杯高为14cm,底面周长为32cm,在杯内壁离杯底5cm的点B处有一滴蜂蜜,此时一只蚂蚁正好在杯外壁,离杯上沿3cm与蜂蜜相对的点A处,则蚂蚁从外壁A处到内壁B处的最短距离为cm(杯壁厚度不计). 14.(3分)在﹣4、﹣2,1、2四个数中、随机取两个数分别作为函数y=ax2+bx+1中a,b的值,则该二次函数图象恰好经过第一、二、四象限的概率为. 三、解答题(本题共10题,满分78分(x-2)≤8 15.(5分)求满足不等式组的所有整数解. 16.(6分)在端午节来临之际,某商店订购了A型和B型两种粽子,A型粽子28元/千克,B型粽子24元/千克,若B型粽子的数量比A型粽子的2倍少20千

黄冈市2020年中考数学模拟试题(含答案)

A B C D M P 第6题图 黄冈市2020年中考数学模拟试题 满分120分:时间:120分钟 考生 得分 一、选择题(A ,B ,C ,D 四个答案中,有且只有一个是正确的,每小题3分,满分18分) 1、下列运算正确的是( ) A 、235a b ab += B 、623 a a a ÷= C 、2 2 2 ()a b a b +=+ D 、3 25· a a a = 2、到三角形三条边的距离都相等的点是这个三角形的( )。 A 、三条中线的交点 B 、三条高的交点 C 、三条边的垂直平分线的交点 D 、三条角平分线的交点如图, 3、下列图形中,不能.. 表示长方体平面展开图的是( ) 4 颜色 黑色 棕色 白色 红色 销售量(双) 60 50 10 15 鞋店经理最关心的是哪种颜色的鞋最畅销,则对鞋店经理最有意义的统计量是 ( ) A .平均数 B .众数 C .中位数 D .方差 5、袋中有同样大小的4个小球,其中3个红色,1个白色。从袋中任意地 同时摸出两个球,这两个球颜色相同的概率是( )。 A 、 21 B 、31 C 、32 D 、4 1 6、矩形ABCD 中,1AB =,2AD =,M 是CD 的中点,点P 在矩形的 边上沿A B C M →→→运动,则APM △的面积y 与点P 经过的路程x 之间的函数关系用图象表示大致是下图中的( ) 二、填空题(每空3分,满分36分) 7、3-的相反数是 ;分解因式:2 x xy -= ;已知点(13)A m -,与点 (21)B n +,关于x 轴对称,则点P (m ,n )的坐标为 . 8、已知等腰梯形ABCD 的中位线EF 的长为5,腰AD 的长为4,则这个等腰梯形的周长 为 ;函数x y 1-2= 中,自变量x 的取值范围是 ;圆锥的母线和底 面的直径均为6,圆锥的侧面展开图的圆心角等于 度. 9、计算mn n m n m +÷ -)11( = ;已知反比例函数y =8 x - 的图象经过点P (a +1,4), 则a = ;抛物线y =7x 2+28x +30的顶点坐标为 。 10、⊙O 1与⊙O 2的圆心距为5,⊙O 1的半径为3,若两圆相切,则⊙O 2的半径为 。 11、将图,四边形OABC 为菱形,点B 、C 在以点O 为圆心的弧EF 上,若OA =3,∠1=∠2,则扇形OEF 的面积为 12、瑞士的一位中学教师巴尔末从光谱数据95,1612,2521,36 32 ,L 中,成功地发现了其规律,从而得到了巴尔末公式,继而打开了光谱奥妙的大门.请你根据这个规律写出第9个数 . 三、解答题(共8道大题,满分66分) 13.(满分5分)先化简,后求值:3(2)2x x x ??-+ ?+? ?,其中0 21)x = 14.(满分6分)如图,点E 、F 、G 分别 是□ABCD 的边AB 、BC 、CD 、DA 的中点.求 证:ΔBEF ≌ΔDGH . y y y y (第11题图) E F O A B C 2 1 G H E F D C B A

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