北京市朝阳区高三年级第一次综合练习
英语
（考试时间120分钟满分150分）
本试卷共12页，共150分。考试时长120分钟。考生务必将答案答在答题卡上，在试卷上作答无效。
第一部分听力理解（共三节，30分）
第一节（共5小题；每小题分，满分分）
听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
例：What is the man going to read
A. A newspaper.
B. A magazine.
C. A book.
答案是A.
1. What is the woman wearing to the party
A. A dress.
B. Shorts.
C. Jeans.
2. What will the woman eat with her coffee
A. A slice of cake.
B. Some biscuits.
C. Some chocolate.
3. Where are the two speakers
A. On the street.
B. At the airport.
C. At the railway station.
4. What will the man do this afternoon
A. Play football.
B. Play tennis.
C. Play computer games.
5. How will the man go to school tomorrow
A. By car.
B. By bus.
C. By bike.
第二节（共15小题；每小题分，满分分）
听下面5段对话或独白。每段对话或独白后有几个小题，从题中做给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听第6段材料，回答第6、7题。
6. What did the man want to do
A. Post a letter.
B. Join the library.
C. Check identification.
7. What did the man provide at last
A. His passport.
B. His bankbook.
C. His driving licence.
听第7段材料，回答第8至9题。
8. What is the probable relationship between the two speakers
A. Husband and wife.
B. Boss and secretary.
C. Teacher and student.
9. Who will try to solve the problem
A. The speakers themselves.
B. A friend of the speakers.
C. The electricity company.
听第8段材料，回答第10至12题。
10. Which motorway will stay closed
A. M7.
B. M16.
C. M43.
11. Why can’t drivers use Green Street
A. Because of an accident.
B. Because of traffic jams there.
C. Because of the problem with the road.
12. What is the weather like this afternoon
A. Snowy.
B. Sunny.
C. Windy.
听第9段材料，回答第13至16题。
13. What should the man do first for his research project
A. Focus his question.
B. Do a lot of reading.
C. Choose key arguments.
14. What is the man’s main problem
A. He doesn’t analyze the material.
B. He doesn’t narrow the topic down.
C. He doesn’t keep a note of different ideas.
15. What are the two speakers talking about
A. The importance of choosing a topic.
B. The process of doing a research project.
C. The difficulty in arranging different ideas.
第三节（共5小题；每小题分，共分）
听下面一段对话，完成第16至20五道小题，每小题仅填写一个词。听对话前，你将有20秒钟的时间阅读
试题，听完后你将有60秒钟的作答时间。这段对话你将听两遍。
第二部分：知识运用（共两节，45分）
第一节单项填空（共15小题；每小题1分，共15分）
从每题所给的A、B、C、D四个选项中，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。
A. What’s more
B. That’s to say
C. In other words
D. Believe it or not
A. for
B. so
C. or
D. but
22. ---When shall I come to see you, in the morning or afternoon
A. Either
B. Neither
C. Both
D. None
A. chaired
B. was chairing
C. had chaired
D. would chair
A. because
B. when
C. unless
D. until
A. that
B. when
C. unless
D. until
A. should
B. must
C. might
D. would
A. why
B. how
C. what
D. that
A. used
B. using
C. to use
D. being used
29. ---Is Mr. Lewis still here
A. is
B. was
C. has been
D. would be
A. replaced
B. replacing
C. to replace
D. being replaced
A. what
B. how
C. when
D. why
32. ---Any predictions for the election
A. to be
B. to have been
C. being
D. having been
A. will inform of
B. have informed of
C. will be informed of
D. have been informed of
A. that
B. what
C. which
D. when
35. ---Did you enjoy your trip
A. didn’t enjoy
B. hadn’t enjoyed
C. wouldn’t enjoy
D. wouldn’t have enjoyed
第二节完形填空（共20小题；每小题分，共30分）
阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
An Effective Commercial
I have to admit that I rarely watch commercials, since most of them are boring and stupid. When watching commercials, we are “learning” that consumption makes us happy and that we need to buy
A young lady is talking over the phone to her family right before Christmas. She is obviously living
Christmas with her.
again I am reminded that the best Christmas gifts are not the ones you buy in the retail store. They
my own life or the lives of others. It can make me think and pass on a few of those thoughts to other people.
36. A. relaxed B. annoyed C. nervous D. curious
37. A. view B. story C. noise D. word
38. A. attention B. way C. idea D. trouble
39. A. warned B. informed C. reminded D. cured
40. A. missing B. supporting C. comforting D. inviting
41. A. materials B. repots C. messages D. presents
42. A. argues B. responds C. mentions D. proves
43. A. sympathy B. sorrow C. concern D. desire
44. A. check B. follow C. pass D. clear
45. A. practically B. fortunately C. successfully D. surprisingly
46. A. arrange B. celebrate C. occupy D. approach
47. A. improved B. confused C. affected D. stressed
48. A. imagine B. approve C. remember D. promise
49. A. suggest B. confirm C. identify D. strengthen
50. A. accept B. share C. admit D. judge
51. A. pride B. honor C. love D. respect
52. A. move B. control C. protect D. encourage
53. A. helpful B. memorable C. believable D. relevant
54. A. symptoms B. conditions C. origins D. themes
55. A. promote B. update C. associate D. discover
第三部分：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
56. What is an advantage of the luggage
A. It is heavy.
B. It is tough.
C. It is big enough.
D. It is easy to use.
57. How can Mr. Hill receive a price reduction
A. He should order before April 6.
B. He should place an order online.
C. He should visit Mr. Carter’s office personally.
D. He should buy a large number of the products.
58. Why does Mr. Carter write the letter
A. To reply to Mr. Hill’s questions.
B. To promote sales of his products.
C. To make sure he will meet Mr. Hill.
D. To give a description about the luggage.
B
Envelope Budget
From McDonald’s to Sonic, fast food had a bad effect on my waistline and my budget. It was nothing to run to a drive-through to pick up a cold drink or a quick bite to eat. It was so easy to use my card for a small purchase. For me, I got a lot of satisfaction from fast food.
One day I sat down and calculated that I was spending a surprising $40 a week on fast food. This was a lot of iced coffee and hamburgers! Instead of reducing my guilty pleasures, I decided to give myself a strong budget to reduce my consumption. Every Monday I placed an envelope with $20 in my purse. That was my fast food budget for the entire week. If there was anything left over at the end of the week, it was mine to save or spend. If I spent all of the money during the week, there were no more fast food stops that week.
The budget made me more mindful of my purchases. Instead of purchasing a large drink from Sonic.
I would purchase a small. It was still satisfying but not nearly as pricey. Instead of eating a whole meal, I would pick the part that I actually wanted. Many days, the thought of hanging onto the money for a special purpose meant more to me than the instant satisfaction of fast food. I never really felt unhappy because it was a conscious choice to spend or save with each purchase.
Envelope budget kept me honest. I had a clear idea how much money was spent each week on fast food purchases. I started to bring my lunches more often to save more money for the week. It was a fun challenge to see how much I could save every week.
Changing the way I spent on fast food not only helped my budget, but improved my weight. In the
first month I was able to get rid of 5 pounds by simply changing the way I approached spending on fast food. Now I am more likely to bring my lunch than to buy it. I am not upset, but empowered to make positive choices to improve my life.
59. According to Paragraph 1, the author .
A. had no time to cook for herself
B. was fond of fast food very much
C. lived with a small amount of money
D. got some benefits from using her card
60. The author set her envelope budget to .
A. buy fast food at a good bargain
B. save money to buy more fast food
C. make fast food spending under control
D. get rid of the habit of eating fast food
61. We can infer from the last paragraph that .
A. envelope budget is good for health
B. the budget means a pressure on life
C. it is unusual to make some changes
D. it is hard to enjoy a healthy lifestyle
62. What is the passage mainly about
A. Why the author became addicted to fast food.
B. Why the author took envelope budget seriously.
C. How fast food controlled the author’s behavior.
D. How envelope budget changed the author’s life.
C
The British love word-play and they’re enthusiastic about defending the use of their language. In recent years, books about the grammar, pronunciation and punctuation(标点)of English have been written by the dozen, and sold extremely well, reflecting people’s love of the English language. People want to defend the “correct”use of their language, but also to preserve its ability to evolve along with society. Lynne Truss’s book Eats, Shoots & Leaves is an excellent example of these two opposite ideas. Its title shows the way that punctuation can change meaning in a sentence. “Eats
shoots and leaves”is a perfectly normal description of a panda’s diet: he eats the shoots and leaves of bamboo trees. But the position of the comma(逗号) turns those nouns into verbs, and makes up a ridiculous little story: the panda eats (his dinner), he shoots (a gun), and he leaves (the building). It’s a silly joke, but it shows how changing something as simple as a comma can change the entire meaning of a sentence.
Published in 2003, Eats, Shoots & Leaves was an unexpectedly huge success. It is easy to assume the typical reader of this kind of book as the humorless type. However, the book has sold thousands and thousands of copies—it must be appealing to a wide range of people. The book’s winning secret is this: it makes some serious points about language and punctuation, but also has a light-hearted dimension, and uses stories and jokes to show its points. It has invited some tough criticism, too, especially from the US. On a broader range, Eats, Shoots & Leaves has opened up a lot of public debate on Truss’s ideas. Whether they agree with her or not, punctuation and grammar has become a popular topic to discuss.
In every generation there will be people who think that the standard of language is in decline, and who are more than happy to write to the newspapers to express their concern and opinions. Truss’s book also appeals to those who think that texting and blogging(博客) is lowering the standard of literacy. Whether the standard of the English language is decreasing, or simply evolving into new forms, the success of Eats, Shoots & Leaves proves that this is a subject that many English speakers find interesting and important.
63. The title of the book Eat, Shoots & Leaves is a joke which shows .
A. a funny feeling
B. a trend in writing
C. a grammatical point
D. a fact about animals
64. The book has been successful because .
A. it presents a new research on English
B. it solves a serious English language problem
C. it shows the British like to teach English to other people
D. it causes concern for proper use of language in a fun way
65. What can be inferred from the passage
A. The English language was better in the past.
B. The English language is being improved by technology.
C. There is often dissatisfaction with the standard of English.
D. There have always been debates on the use of punctuation.
66. What is the best title for the passage
A. The Difference a Comma Made
B. The Problem Punctuation Created
C. Proper Understanding of Silly Jokes
D. Public Debate about Language Standards
D
Role-Playing in Child Development
Playing is a key component in the learning process for virtually all of the children. There are various ways in which children play, but one of the most important is role-playing. This involves a child engaging in an activity during which he or she pretends to be another person.
Experts on child development believe that role-playing can increase the connections in children’s brains that help them learn. Language skills are some of the most important aspects of learning. When children role-play, they must work out steps that need to be taken to complete a task, and create plans to act out a story. These activities enable children to develop their oral language skills. They become able to organize others and to give directions.
Children’s social skills can also be developed. When engaged in group activities, children have different roles. Some are leaders while others are followers. At times, the children will disagree, so they must learn to negotiate and compromise with one another, and they must learn to apologize when they have strong arguments or disagreements as well. Children further learn about cooperation and sharing and, hopefully, begin to understand things from another person’s point of view. Besides helping children learn some kinds of skills, role-playing fosters children’s imaginations and can therefore assume a number of forms. For example, boys may pretend to shave like their fathers or perform various tasks around their homes. Girls, meanwhile, often pretend to be mothers to do some daily tasks, particularly if it involves caring for young babies. Sometimes children may imagine belonging to a group of superheroes or imitate(模仿)real-life situations. They might dress up and assume different roles. Another example is the performing of stories they read in books, which is also very common when they role-play.
Another beneficial aspect of role-playing is that it can help children deal with certain actions
that may cause them emotional(情感的) pain, such as the fear they face when going to school for the first time or making a visit to the doctor. If children role-play situations like these beforehand, the first that they experience when doing these actions in reality frequently lessons. For this reason, experts encourage parents to allow their children to role-play and even to take part in these activities to help their children master their fears.
Role-playing can benefit children in many ways. There is no activity for which young children are better prepared than fantasy play. Nothing is more dependable and risk-free, and the dangers are only pretend.
67. From the author’s description in Paragraph 4, we learn that children often .
A. involve daily-life activities in groups
B. act out the activities that their parents do
C. perform daily tasks instead of their parents
D. change real-life situation when role-playing
68. The author believes that role-playing may help children .
A. develop a better awareness of grammar
B. receive benefits from their emotional pain
C. improve creativity by using their imaginations
D. understand how to be both leaders and followers
69. The underlined word “master” in Paragraph 5 probably means .
A. ignore
B. confirm
C. overcome
D. predict
70. Which of the following shows the organization of the passage
A. B.
C. D.
I: Introduction P:Point Sp: Sub-point (次要点) C: Conclusion
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。
The Tower and the Glory
A large man jumps onto my shoulders. He is quickly followed by another slightly smaller man who catches my belt and moves up. Another follows. Then I begin to move slowly from on side to another dangerously.
A castell is a human tower built traditionally in festivals in Spain. The activity of making human towers began almost 200 years ago near Tarragona, just south of Barcelona. 71 It has become an annual event in some areas of the country. Usually it is considered a success once all castellers have climbed into their appointed places. On November 16, 2010, castells were declared to be one of the Masterpieces of the Oral and Intangible Heritage of Humanity.
72 It is a formation of several people in which two or more people support a level of higher people, who in turn may support other higher levels of people. Each person is wound into a long narrow piece of cloth worn around the waist to help other people hold tightly when they climb. Typically, the number of the people in each level is one greater than the level immediately above it, resulting in a triangular structure. 73
At first I’d like to go on top to enjoy the glory, but the clu b’s president indicated a little girl who looked as though she had been raised on the top. It was she who had pride of place on top of the tower. For my first try-out I was given the role of second hands. Once I had assumed my position, people began to climb up me to the tower without warning. 74 My hard work must have been appreciated because I was quickly promoted to support the bottoms of the first level of the tower.
My performance in the “hands”section was obviously satisfactory. 75 I was really proud of that, since it was a clear gesture that I had been fully accepted.
A. Building a good human tower takes team work and skills.
B. Within seconds I assisted in the formation of a three- level tower.
C. Each team is famous for its tallest and most complex tower of people.
D. Once a tower is built, try and see if the group can hold it for a count of 30.
E. Since then it’s been popular, with groups competing to build higher structures.
F. Before long I was called forward and given the great honor of the President’s Belt.
G. I hoped to change my position because I knew that this activity required particular skills.第四部分书面表达（共两节，满分35分）
第一节（15分）
假设你是红星中学高三（1）班学生李华，你校将在下周五举办“校园文化节（Campus CultureFestival）”系列活动。请给你班留学生Jim写封邮件，邀请他参加。邮件的内容包括：
1. 介绍你选择的活动内容；
2. 说明参加该活动的理由；
3.询问是否愿意参加该活动。
注意：
1．字数不少于50；
2．邮件的开头和结尾已给出，不计入总词数。
Dear Jim,
____________________________________________________________________________________________ __________________________________________________________________
Yours,
Li Hua 第二节（20分）
假设你是红星中学高三（1）班学生李华，上周末你和同学到公园游览。请根据以下四幅图的先后顺序，以“My Experience in the Park”为题，给校刊“英语角”写一篇英文稿件，介绍游园过程中发生的一件事。
注意：词数不少于60。
提示词：拱桥arch bridge
My Experience in the Park
北京市朝阳区高三年级第一次综合练习
英语学科测试答案
第一部分：听力理解（共三节，30分）
第一节（共5小题；每小题，共分）
1-5 BBCCA
第二节（共10小题；每小题，共15分）
6-10 BAABC 11-15 ACACB
第三节（共5小题；每小题，共分）
每小题分。如出现拼写错误不计分；出现大小写、单复数错误扣分；如每小题超过一个词不计分。
16. Tuesday 17. 25 20. 4
第二部分：知识运用（共两节，45分）
第一节单项填空（共15小题；每小题1分，共15分）
21-25 DABCD 26-30 BCBBA 31-35 DACAD
第二节完形填空（共20小题；每小题分，共30分）
36-40 BDACA 41-45 DBCAD 46-50 BCADB 51-55 CABDC
第三部分：阅读理解（共两节，40分）
第一节（共15小题；每小题2分，共30分）
56-60 BDBBC 61-65 ADCDC 66-70 ABDCA
第二节（共5小题；每小题2分，共10分）
71-75 EADBF
第四部分：书面表达（共两节，35分）
第一节（15分）
Dear Jim,
I’m writing to invite you to the annual Campus Culture Festival to be held next Friday.
This year the festival will provide various activities. As a lover of traditional culture, I’d like to choose kite flying. There will be pictures, poems and proverbs about kites when the time comes. We will also have the chance to learn how to make kites from folk artists. Besides, a competition for kite flying will be held. I’m sure we’ll develop our awareness of traditional culture and practical ability during this activity.
If you are interested in it, please let me know. Hope to meet at the Campus Culture Festival.
Yours,
Li Hua
第二节（20分）
My Experience in the Park
Last weekend my classmates and I went to a nearby park for relaxation.
As we entered the park, we found so many tourists enjoying the beauty of spring. Some were taking photos of colorful flowers. Some were sitting comfortably in the sun chatting. When we came to an arch bridge, we noticed a grandpa struggling to push a wheelchair onto the bridge. A grandma was sitting in it. Seeing this, my classmate and I rushed forward to give them a hand. Two of us tried hard to push the wheelchair, while another classmate walked across the bridge with the grandpa. The elderly couple were very grateful and spoke highly of us. Some tourists standing nearby also praised us with their thumbs up.
We enjoyed the natural beauty of spring today, and most importantly, we were happy that we could be of help to others.
2018年河北省普通高等学校对口招生考试 英语 第一部分英语知识运用（共分三节，满分40分） 第一节语音知识：从A、B、C、D四个选项中找出其划线部分与所给单词划线部分读音相同的选项。（共5分, 每小题1分） 1. open A. lonely B. cost C. doctor D. shop 2. smile A. trip B. him C. hide D. rich 3. how A. low B. power C. tomorrow D. bowl 4. laugh A. sight B. cough C. eight D. night 5. nose A. groups B. gas C. house D. praise 第二节词汇与语法知识：从A、B、C、D四个选项中选出可以填入空白处地最佳选项。 （共25分, 每小题1分） 6. Jack _______ be a nurse, for he works in a bookstore. A. needn’t B. must C. can’t D. should 7. —I’m afraid I can’t return the storybook to you before Sunday. —_______. A. Don’t be afraid B. Be careful C. Not at all D. Take your time 8. We won’t go for a walk if it _______ tomorrow. A. rain B. rains C. will rain D. rained 9. Is he the student _______ brother works in a foreign company? A. who B. that C. whose D. of whom 10. You should do your work a bit _______next time. A. care B. more carefully C. more careful D. careful 11. It’s reported that a new hospital _______ next month. A. set up B. has been set up C. will be set up D. will set up 12. I’ll send you a massage _______ I arrive in Shijiazhuang. A. as soon as B. as far as C. as well as D. as much as 13. I have never been abroad, _______ he. A. neither has B. nor had C. so has D. so had 14. We would had dropped by if we _______ time. A. have had B. had had C. had D. have 15. Our city is becoming more and more beautiful. It’s no longer_______. A. what it used to be B. what it used to being C. what it was used to be D. what it was used to being 16. The Spring Festival is on _______first day of ______ year on the lunar calendar. A. /; a B. /; the C. the; / D. the; a 17. —How is the weather today? —It’s fine _______rather cold. A. with B. but C. or D. for
北京市朝阳区2018年初中英语一模试题(Word版含答案)2018.4
北京市朝阳区2018 年初中毕业考试 知识运用(共40 分) 一、单项填空(共24 分,每小题2 分) 从下列各题所给的A、B、C、D 四个选项 中,选择可以填入空白处的最佳选项。 1. My father is a teacher. works in No. 5 Middle School. A. I B. He C. She D. You 2. We usually have the first class 8:00 in the morning. A. at B. in C. on D. for 3. —Excuse me, is the bank, please? — It's next to the supermarket. A. which B. when C. where D. what
didn’t rain D. isn’t raining 11.The trees here two years ago . A. plant B. planted C. are planted D. were planted 12. —Do you know ? —Tomorrow morning . A. when will they come to visit us B. when did they come to visit us C. when they will come to visit us D. when they came to visit us 二、完形填空(共16 分,每小题2 分)
北京市朝阳区高三年级第一次综合练习 数学试卷（理工类） （考试时间120分钟 满分150分） 本试卷分为选择题（共40分）和非选择题（共110分）两部分 第一部分（选择题 共40分） 注意事项：考生务必将答案答在答题卡上，在试卷上答无效。 一、选择题：本大题共8小题，每小题5分，共40分．在每小题给出的四个选项中，选出 符合题目要求的一项. 1. 复数 10i 12i =- A. 42i -+ B. 42i - C. 24i - D. 24i + 2. 已知平面向量,a b 满足()=3a a +b ?，且2,1==a b ，则向量a 与b 的夹角为 A. 6π B. 3π C. 32π D. 6 5π 3.已知数列{}n a 的前n 项和为n S ，且21()n n S a n N * =-∈，则5a = A. 16- B. 16 C. 31 D. 32 4. 已知平面α，直线,,a b l ，且,a b αα??，则“l a ⊥且l b ⊥”是“l α⊥”的 A ．充分不必要条件 B ．必要不充分条件 C ．充分必要条件 D ．既不充分也不必要条件 5. 有10件不同的电子产品，其中有2件产品运行不稳定.技术人员对它们进行一一测试， 直到2件不稳定的产品全部找出后测试结束，则恰好3次就结束测试的方法种数是（ ） A. 16 B. 24 C. 32 D. 48 6.已知函数()f x 是定义在R 上的偶函数，且对任意的x ∈R ，都有(2)()f x f x +=.当 01x ≤≤时，2()f x x =.若直线y x a =+与函数()y f x =的图象在[0,2]内恰有两个 不同的公共点，则实数a 的值是 A.0 B. 0或12- C. 14-或12- D. 0或1 4 - 7. 某工厂生产的A 种产品进入某商场销售，商场为吸引厂家第一年免收管理费，因此第一 年A 种产品定价为每件70元，年销售量为11.8万件. 从第二年开始，商场对A 种产品 征收销售额的%x 的管理费（即销售100元要征收x 元），于是该产品定价每件比第一年 增加了 70% 1% x x ?-元，预计年销售量减少x 万件，要使第二年商场在A 种产品经营中收取的 管理费不少于14万元，则x 的取值范围是 A. 2 B. 6.5 C. 8.8 D. 10 8.已知点集{} 22(,)48160A x y x y x y =+--+≤，
北京市朝阳区九年级综合练习（一） 数 学 试 卷 2013.5 学校 姓名 准考证号 一、选择题（本题共32分，每小题4分） 下面各题均有四个选项，其中只有一个．．是符合题意的． 1.-3的倒数是 A ．13 B ．1 3 - C ． 3 D ．-3 2．“厉行勤俭节约，反对铺张浪费”势在必行．最新统计数据显示，中国每年浪费食物总量折合为粮食大约是200000000人一年的口粮．将200000000用科学记数法表示为 A ．8210? B ．9210? C ．90.210? D ．72010? 3． 若一个正多边形的一个外角是72°，则这个正多边形的边数是 A ．10 B ．9 C ．8 D ．5 4．如图，AB ∥CD ，E 是AB 上一点，EF 平分∠BEC 交CD 于点F ，若∠BEF =70°，则∠C 的度数是 A ．70° B ．55° C ．45° D ．40° 5．掷一枚质地均匀的正方体骰子，骰子的六个面上分别刻有1到6的点数，掷得面朝上 的点数大于4的概率为 A ．61 B ．31 C ．41 D ．2 1 6．把方程2630x x ++=化成()2 x n m +=的形式，正确的结果为 A ．()2 36x += B ．()2 36x -= C ．()2 312x += D ．()2 633x +=
7．某校春季运动会上，小刚和其他16名同学参加了百米预赛，成绩各不相同，小刚已经知道了自己的成绩，如果只取前8名参加决赛，他想知道自己能否进入决赛，还需要知道所有参加预赛同学成绩的 A . 平均数 B . 众数 C . 中位数 D . 方差 8．如图，将一张三角形纸片ABC 折叠，使点A 落在BC 边上，折痕EF ∥BC ，得到△EFG ；再继续将纸片沿△BEG 的对称轴EM 折叠，依照上述做法，再将△CFG 折叠，最终得到矩形EMNF ，折叠后的△EMG 和△FNG 的面积分别为1和2，则△ABC 的面积为 A . 6 B . 9 C . 12 D . 18 二、填空题（本题共16分，每小题4分） 9．在函数1 2 y x =+中，自变量x 的取值范围是 ． 10．分解因式：3m m -= . 11．如图，AB 为⊙O 的弦，半径OC ⊥AB 于点D ，AB =32， ∠B =30°，则△AOC 的周长为 . 12. 在平面直角坐标系xOy 中，动点P 从原点O 出发，每次向上平移1个单位长度或向右 平移2个单位长度，在上一次平移的基础上进行下一次平移．例如第1次平移后可能到达的点是（0，1）、（2，0），第2次平移后可能到达的点是（0，2）、（2，1）、（4，0），第3次平移后可能到达的点是（0，3）、（2，2）、（4，1）、（6，0），依此类推……．我们记第1次平移后可能到达的所有点的横、纵坐标之和为l 1，l 1=3；第2次平移后可能到达的所有点的横、纵坐标之和为l 2，l 2=9；第3次平移后可能到达的所有点的横、纵坐标之和为l 3，l 3=18；按照这样的规律，l 4= ； l n = (用含n 的式子表示，n 是正整数)．
2018北京市朝阳区高三（一模）生物本部分共20小题，每小题6分，共120分。在每小题列出的四个选项中，选出最符合题目要求的一项。 1.以下实验选材不能．．达到实验目的的是 A.利用鸡红细胞进行DNA的粗提取 B.利用蛙红细胞观察细胞有丝分裂 C.利用猪红细胞制备纯净的细胞膜 D.利用羊红细胞进行细胞吸水失水实验 2.单细胞浮游植物杜氏盐藻是最耐盐的光合生物之一。研究发现，K+浓度对杜氏盐藻的生长繁殖具有重要作用。下列说法合理的是 A.每天需定时对杜氏盐藻逐个计数以绘制生长曲线 B.4mmol/L的K+对杜氏盐藻生长繁殖具有抑制作用 C.杜氏盐藻的高耐盐性是其与环境共同进化的结果 D.若将K+替换成Na+，则得到的实验结果也一定相同 3.荧光定量PCR技术可定量检测样本中某种DNA含量。其原理是：在PCR反应体系中每加入一对引物的同 时加入一个与某条模板链互补的荧光探针，当Taq酶催化子链延伸至探针处，会水解探针，使荧光监测系统 接收到荧光信号，即每扩增一次，就有一个荧光分子生成。相关叙述错误．．的是 A.引物与探针均具特异性，与模板结合时遵循碱基互补配对原则 B.Taq酶可以催化子链沿着3’→5’方向延伸，需dNTP作为原料 C.反应最终的荧光强度与起始状态模板DNA含量呈正相关 D.若用cDNA作模板，上述技术也可检测某基因的转录水平 4.下丘脑的CRH神经元兴奋后可分泌促肾上腺皮质激素释放激素CRH(一种含41个氨基酸的神经肽)，促进垂体分泌促肾上腺皮质激素，进而促进肾上腺皮质分泌肾上腺皮质激素。研究发现下丘脑-垂体-肾上腺轴的功能紊乱，可使CRH神经元过度兴奋，导致CRH分泌增多，为抑郁症的成因之一。下列叙述错误．．的是 A.正常状态下，兴奋在神经元之间以电信号的形式进行单向传递 B.CRH的合成、加工需要多种细胞器协调配合，分泌方式为胞吐 C.健康人血液中肾上腺皮质激素增多时会增强对下丘脑的抑制
北京市朝阳区九年级综合练习（一） 语文试题 一、积累运用。（共20分） （一）古诗文积累（共8分） 5月，朝阳区开展了“书香浸润人生”的诵读展示活动。同学们在吟、诵、品、尚的过程中，提高了人文素养，增强了民族自豪感。作为活动的一员，请你完成下列任务。 1. 下列诗句中描写战斗生活场面的一项是（2分） A. 天下英雄谁敌手？曹刘。 B. 马作的卢飞快，弓如霹雳弦惊。 C. 会挽雕弓如满月，西北望，射天狼。 D. 浊酒一杯家万里，燕然未勒归无计。 2. 下列诗句书写有误的一项是（2分） A. 但愿人长久，千里共婵娟。 B. 采菊东篱下，悠然见南山。 C. 无可奈何花落去，似曾相识雁归来。 D. 沉舟侧畔千帆过，病树前头万木春。 3. 春光烂漫时节，海棠花溪游人如织。溪岸边，花树下，小径旁，处处绿草如茵；西府、贴梗、八棱、垂丝... ...各色海棠，千姿百态，争奇斗妍，令人应接不暇。如果你也欣赏到了这种迷人的景致，会联想到哪联古诗？请简要说出这种情景为什么会让你联想到所写的古诗。（4分） 答： （二）名著阅读（共12分） 4. 阅读连环画，完成第（1）—（4）题。（共8分）
（1）结合连环画的内容，推断A处的人物是________。（2分）（2）阅读第9副画，简要写出当年曹操厚待“将军”的事例。（2分）答：_________
（3）从连环画的内容来看。曹操是在_______战败之后落荒而逃的。（只填序号）（2分） A.官渡之战 B.夷陵之战 C.赤壁之战 D.徐州之战 （4）“批评”是一种传统的读书方法，是用简洁的语言在文中空白处写上点评或注解的内容，表达自己的阅读时的体会和思考。毛宗岗对曹操的“三笑一哭”批注道：“宜哭反笑，宜笑反哭，奸雄哭笑，与众不同。”请你结合对《三国演义》中曹操的了解，谈谈如此批注的依据（2分）答：_________ 5. 阅读《红岩》，完成第（1）-(2)题。（4分） （1）在白公馆，面对徐鹏飞给出的选择，成岗朗诵了《我的“自白书”》。结合诗歌内容，可以推断成岗朗诵时候的情绪是（2分） A.恬淡闲适 B.慷慨激昂 C.寂寞伤感 D.轻松欢快 我的“白皮书” 任脚下响着沉重的铁镣， 任你把皮鞭举得高高， 我不需要什么“自白”， 哪怕胸口对着带血的刺刀！ 人，不能低下高贵的头， 只有怕死鬼才乞求“自由”。 毒刑拷打算得了什么？ 死亡也无法叫我开口！ 对着死亡我放声大笑， 魔鬼的宫殿在笑声中动摇。 这就是我———一个共产党员的“自白” 高唱凯歌埋葬蒋家王朝！ （2）请结合上面的诗歌或《红岩》的内容，说说你做出以上推断的理由。（2分） 答：_________ 二、文言文阅读。（共10分） 【甲】 嗟夫！予尝求古仁人之心，或异二者之为，何哉？不以物喜，不以己悲；居庙堂之高则忧其
2020 年北京市海淀区高三期末英语试卷 第一部分：听力理解（共三节，30 分） 第一节（共 5 小题；每小题 1.5 分，共 7.5 分） 听下面 5 段对话，每段对话有一道小题，从每题所给的 A、B、C 三个选项中选出最佳选项，听完每段对话后，你将有 10 秒钟的时间来回答有关小题和阅读下一小题。每段对话你将听一遍。 1. How will the speakers go to London? A. By air. B. By ship. C. By coach. 2. What is the woman’s brother? A. A project manager. B. A wildlife photographer. C. A government official. 3. Where will the man go? A. To the butcher’s. B. To the baker’s. C. To the grocer’s. 4. What does the woman suggest the man do? A. Go to bed. B. Watch a match. C. See the dentist. 5. How much will the man pay? A.$10. B.$18. C.$20. 第二节（共10 小题；每小题 1.5 分，共15 分） 听下面4 段对话或独白。每段对话或独白后有几道小题，从每题所给的A、B、C 三个选项中选出最佳选项。听每段对话或独白前，你将有5 秒钟的时间阅读每小题。听完后，每小题将给出 5 秒钟的作答时间。每段对话或独白你将听两遍。
2019北京朝阳高三一模 理综物理 13.一个铀核( )发生裂变，核反应方程是 → +3X ，并出现质量亏损则 A.X 是电子，裂变过程放出能量 B. X 是中子，裂变过程放出能量 C.X 是电子，裂变过程吸收能量 D. X 是中子，裂变过程吸收能量 14.下列说法正确的是 A.液体分子的无规则运动称为布朗运动 B.物体温度升高，其中每个分子热运动的动能均增大 C.气体对容器的压强是大量气体分子对器壁的碰撞引起的 D.气体对外做功，内能一定减少 15.如图为速度选择器示意图， 、 为其两个极板。某带电粒子以速度 从 射入，恰能沿虚线从 射出。不计粒子重力，下列说法正确的是 A.极板 的电势一定高于极板 的电势 B.该粒子一定带正电 C.该粒子以速度2 、从 射入，仍能沿虚线从 射出 D.该粒子以速度 从 射入，也能沿虚线从 射出 16.一列简谐横波某时刻的波形如图所示，P 为介质中的一个质点，波沿x 轴的正方向传播。下列说法正确的是 A.质点P 此时刻的速度沿y 轴的负方向 B.质点P 此时刻的加速度沿y 轴的正方向 C.再过半个周期时，质点p 的位移为负值 D.经过一个周期，质点P 通过的路程为2a 17.如图所示，一理想变压器的原线圈接正弦交流电源，副线圈接有电阻R 和小灯泡。电流表和电压表均可视为理想电表。闭合开关S ，下列说法正确的是 A.电流表A 1的示数减小 B.电流表A 2的示数减小 C.电压表V 1的示数减小 D.电压表V 2的示数减小 18.如图所示，A,B 是两个带异号电荷的小球，其质量相等，所带电荷量分别为q 1、q 2， A 球用绝 缘细线悬挂于0点，A 、B 球用绝缘细线相连，两细线长度相等，整个装置处于水平匀强电场中， 平衡时，两细线张紧，且B 球恰好处于O 点正下方，则可以判定，A 、B 两球所带电荷量的关系为 A. q 1=-q 2 B. q 1=-2q 2 C. 2q 1=-q 2 D. q1=-3q 2
北京市朝阳区九年级综合练习（一） 数学试卷 2019.5 学校 班级 姓名 考号 考 生 须 知 1．本试卷共8页，共三道大题，28道小题，满分100分。考试时间120分钟。 2．在试卷和答题卡上认真填写学校名称、姓名和准考证号。 3．试题答案一律填涂或书写在答题卡上，在试卷上作答无效。 4．在答题卡上，选择题、作图题用2B 铅笔作答，其他试题用黑色字迹签字笔作答。 5．考试结束，请将本试卷、答题卡和草稿纸一并交回。 一、选择题（本题共16分，每小题2分） 下面1-8题均有四个选项，其中符合题意的选项只有．．一个． 1．下面是一些北京著名建筑物的简笔画，其中不是．．轴对称图形的是 （A ） （B ） （C ） （D ） 2．实数m ，n 在数轴上对应的点的位置如图所示，若0mn <，且m n <，则原点可能是 （A ）点A （B ）点B （C ）点C （D ）点D 3．下列几何体中，其三视图的三个视图完全相同的是 （A ） （B ） （C ） （D ） 4．电影《流浪地球》中，人类计划带着地球一起逃到距地球4光年的半人马星座比邻星．已知光年是天文学中的距离单位，1光年大约是95000亿千米，则4光年约为 （A ）9.5×104亿千米 （B ）95×104亿千米 （C ）3.8×105亿千米 （D ）3.8×104亿千米 5．把不等式组14, 112 x x -≤?? ?+
6．如果3a b -=，那么代数式2()b a a a a b -?+的值为 （A ）3- （B ）3 （C ）3 （D ）23 7．今年是我国建国70周年，回顾过去展望未来，创新是引领发展的第一动力．北京科技创新能力不断增强，下面的统计图反映了2010—2018年北京市每万人发明专利申请数与授权数的情况． 2010—2018年北京市每万人发明专利申请数与授权数统计图 [以上数据摘自北京市统计局官网] 根据统计图提供的信息，下列推断合理的是 （A ）2010—2018年，北京市每万人发明专利授权数逐年增长 （B ）2010—2018年，北京市每万人发明专利授权数的平均数超过10件 （C ）2010年申请后得到授权的比例最低 （D ）2018年申请后得到授权的比例最高 8．下表是某班同学随机投掷一枚硬币的试验结果． 抛掷次数n 50 100 150 200 250 300 350 400 450 500 “正面向上”次数m 22 52 71 95 116 138 160 187 214 238 “正面向上”频率 n m 0.44 0.52 0.47 0.48 0.46 0.46 0.46 0.47 0.48 0.48 下面有三个推断： ①表中没有出现“正面向上”的频率是0.5的情况，所以不能估计“正面向上”的概率是0.5； ②这些次试验投掷次数的最大值是500，此时“正面向上”的频率是0.48，所以“正面向上”的概率是0.48； ③投掷硬币“正面向上”的概率应该是确定的，但是大量重复试验反映的规律并非在每一次试验中都发生； 其中合理的是 （A ）①② （B ）①③ （C ）③ （D ）②③
北京市海淀区2014届高三第二学期期末练习 英语试题 第二部分：英语知识运用（共两节, 满分45分） 第一节：单项填空（共15小题，每小题1分，满分15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，并在答题卡上将该项涂黑。 21．—Have you told Mr．Smith about the meeting? —Not yet．I ______ him in a minute． A．called B．call C．will call D．have called 22．Students ______ to do some voluntary work every year． A．were encouraged B．are encouraged C．encourage D．encouraged 23．The manager refused to accept ______ of the three suggestions．A．neither B．either C．some D．any 24．I got to the lecture hall very early, ______ to get a good seat．A．hoping B．hoped C．to hope D．hope
25．Online shopping ______ more and more popular in recent years．A．becomes B．became C．is becoming D．was becoming 26．During the final match, all the audience shouted ______ excitement．A．at B．for C．by D．with 27．We are not allowed ______ drinks into the computer lab． A．taking B．to take C．taken D．take 28．—Why is Tom absent today? —No idea．He ______ be ill at home． A．might B．can C．must D．should 29．Although ______ by the opposite team, the players were not discouraged but practiced harder． A．beating B．beaten C．having beaten D．being beaten 30．Air pollution has caused millions of deaths every year, ______ has become a great concern． A．when B．what C．which D．that 31．We ______ for over 2 hours．Are you sure this is the right way?
北京市朝阳区高三年级第一次综合练习 文科综合测试地理试题2017.3 第一部分（选择题，满分140分） 本部分共35小题，每小题4分，共140分。在每小题列出的四个选项中，选出最符合题目要求的一项。 元宵节和端午节是中国的两个传统节日，吃元宵、赏花灯，以及吃粽子、赛龙舟分别是这两个节日的民间习俗。元宵和粽子都是以稻米为原料制成的节令食品。图1 为我国双季稻主要适宜种植区分布图。 回答第1、2题。 1. 对北京而言 A. 端午节后即进入多雨季节 B. 元宵节时的昼长比广州长 C. 元宵节的日出时刻比端午节早 D. 端午节的正午太阳高度比元宵节大 2. 据图可知 A. 双季稻种植的主要影响因素是饮食习惯 B. M界线西段折向西南主要受海拔影响 C. N界线内种植双季稻的优势条件是光照充足 D. 对双季稻生长影响最大的自然灾害是寒潮 图2为局部地区某时刻海平面气压分布图。读图，回答第3、4题。 3. 在图中天气系统影响下，最有可能出现的景 象是 A. 北风卷地白草折 B. 映日荷花别样红 C. 万条垂下绿丝绦 D. 黄梅时节家家雨 4. 此时 A. 最强高压中心位于西伯利亚 B. 渤海海域可能发布海浪预警 C. 京津地区即将迎来大幅降温 D. 陕西北部天气不利于污染物扩散 泰国苏梅岛（9°N。100°E）面积约247平方千米。北京的地理老师小王和他的朋友小李春节期间到苏梅岛旅游。图3为小王手绘的苏梅岛地图以及二人的对话。据此，回答第5、6题。
5. 苏梅岛 A. 属于热带雨林气候 B. 11月至次年4月是当地的旅游旺季 C. 盛产柑橘、葡萄等水果 D. 手绘地图的比例尺约为1:30000 6. 图中 A. 西侧为沙质海岸，东侧为礁石海岸 B. 东侧受地形影响，公路离海较远 C. 酒店区的优势区位因素是旅游资源 D. 影响码头选址的主要因素是市场 光伏发电是将光能直接转变为电能的一种技术，其关键原料是太阳能电池，图4为光伏设备生产流程图。回答第7、8题。 7. 目前，下列省区中最适宜布局太阳能光伏设备生产基地的是 A. 江苏 B. 青海 C. 新疆 D. 贵州 8. 一个国家的光伏发电 A. 成本比矿物能源发电成本低 B. 可有效减少本国大气碳排放 C. 所占比例取决于其太阳能资源的丰富程度 D. 可根据本解决区域能源短缺及环境污染问题 图5为某国等降水量线和自然带分布图。读图，回答第9、10题。
河北衡水2018-2019学年高三年级第三次质检考试 英语试题 本试卷分为第I卷（选择题）和第II卷（非选择题）两部分。共10页。考试结束后，本试卷自己留存，只交答题卡。 第一部分听力(共两节，满分30分) 第一节(共5小题：每小题1.5分，满分7.5分) 听下面5段对话。每段对话后有一个小题，从题中所给的A. B.C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 例:How much is the shirt? A.￡19.15. B.￡9.18. C.￡9.15. 答案是C。 1. What does the man want to do? A. Take photos. B. Buy a camera. C. Help the woman. 2. What are the speakers talking about? A. A noisy night. B. Their life in town. C. A place of living. 3. Where is the man now? A. On his way. B. In a restaurant. C. At home. 4. What will Celia do? A. Find a player. B. Watch a game. C. Play basketball. 5. What day is it when the conversation takes place? A. Saturday. B. Sunday. C. Monday. 第二节（共15小题：每小题1.5分，满分22.5分） 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 听第6段材料，回答6、7题。 6. What is Sarah going to do? A. Buy John a gift. B. Give John a surprise. C. Invite John to France. 7. What does the man think of Sarah’s plan? A. Funny. B. Exciting. C. Strange. 听第7段材料，回答第8、9题。 8. Why does Diana say sorry to Peter? A. She has to give up her travel plan. B. She wants to visit another city. C. She needs to put off her test. 9. What does Diana want Peter to do? A. Help her with her study. B. Take a book to her friend. C. Teach a geography lesson. 听第8段材料，回答第10至12题。 10. Why does the man call the woman? A. To tell her about her new job. B. To ask about her job program. C. To plan a meeting with her. 11. Who needs a new flat? A. Alex. B. Andrea. C. Miranda. 12. Where is the woman now?
2018北京市朝阳区初三综合练习（一） 地 理（选用） 2018. 5 学校 _____________ 班级 _______________ 姓名 _______________ 考号 _______________ 考生须知 1. 本试卷共12页，45题。在试卷和答题卡上认真填写学校、班级、姓名、考号。 2. 试题答案一律填涂或书写在答题卡上,在试卷上作答无效。 3. 在答题卡上，选择题用2B 铅笔作答，其他试题用黑色字迹签字笔作答。 4. 考试结束，请将本试卷、答题卡一并交回。 第I 卷单项选择题（共40道题,40分） 1. 麦哲伦环球航行和地球的卫星照片，共同证明了 A .地球的大小 B .地球的形状 C .地球的海陆分布 D .地表的海拔差异 4月4日至5日，全国大范围出现4月飘雪的景象，北京部分地区有中到大雪。读 图1、2,回答2~4题。 2. 此时，太阳直射点位于 A .①段 B .②段 C .③段 D .④段 3. 能反映此时节气的诗句是 A .清明时节雨纷纷 B 望河大暑对风眠 C .蒹葭苍苍，白露为霜 D .冬至阳生春又来 4. 图2中，表示此时北京天气状况的符号是 图2 2017年7月8日，在第41届世界遗产大会上，福建“鼓浪屿：历史国际社区”正式通过世界遗产大会的终审，成功列入世界文化遗产名录。读图3、4,回答5 ~7题。 5.图4照片拍摄的位置，最可能位于图3的 A ① B .② C .③ D ④ 6. 游览鼓浪屿应选择 A .厦门市景点分布图 B .厦门市交通图 C .鼓浪屿等髙线图 D .鼓浪屿导游图 7. 关于鼓浪屿申遗的描述，正确的是 A .申遗的主要目的是增加财政收人 B .申遗的主要目的是进行有效保护 C .申遗成功后，应大力兴办工业企业 D .申遗成功后，应将本地居民迁出岛外 读图5 ,回答8、9题。 8. 图5表示的地形类型是 A .平原 B .高原 C .盆地 D .山地 9. 图5中
2018年北京市海淀区高三(上)期末 英语 单选 1He is going to pay a visit to university which is located in west of USA. ? A.an; 不填B.a; theC.a; 不填D.the; the 2In addition to a healthy diet, you also need regular exercise weight. ? A.losingB.having lostC.loseD.to lose 3---I have an appointment with Jane. ---Wait a moment. She with her editor about her new book. ? A.is discussingB.will discussC.had discussedD.was discussing 4 you are 18 years old, hopefully you can become more independent. ? A.WhetherB.UnlessC.In caseD.Now that 5Hearing the news, I felt a great load off my mind and everything got easier. ? A.having takenB.takenC.to be takenD.taking 6She had a feeling that she already knew this conversation was going to lead. ? A.whereB.whenC.whyD.how 7---I guess Bob and Amy won't come to the party. ---They just called saying that they . ? A.had been held upB.were holding upC.have been held upD.would hold up 8Chongyang Festival, is also known as the Double Ninth Festival, falls on the ninth day of the ninth month of the Chinese lunar calendar. ? A.whenB.whichC.thatD.who 9---Has the interviewee arrived? ---No. He may have got lost. It easy to find this place. ? A.isn'tB.wasn'tC.won't beD.hasn't been 10 she got on the stage, I hadn't realized she had such a talent in dancing. ? A.SinceB.AsC.UntilD.Once 11If the weather better last weekend, we would have gone to the beach. ? A.wasB.has beenC.wereD.had been 12The immersed tunnel of Hongkong-Zhuhai-Macau Bridge is 6.7 kilometres long, it the world's longest and deepest, undersea tunnel. ? A.to makeB.makeC.makingD.having made 13---How was the weather during your trip in England? ---Strangely fine! It much. ? A.doesn't rainB.didn't rainC.hasn't rainedD.hadn't rained 14We have work to do, but if you need a rest, we start tomorrow. ? A.mustB.canC.shouldD.need
3 北京市朝阳区九年级综合练习（一） 数学试卷 学校 班级 姓名 考号 考 生 须 知 1．本试卷共 8 页，共三道大题， 28 道小题，满分 100 分。考试时间 120 分钟。 2．在试卷和答题卡上认真填写学校名称、姓名和考号。 3．试题答案一律填涂或书写在答题卡上，在试卷上作答无效。 4．在答题卡上，选择题、 作图题用 2B 铅笔作答，其他试题用黑色字迹签字笔作答。 5．考试结束，请将本试卷、答题卡和草稿纸一并交回。 、选择题（本题共 16 分，每小题 2分） 下面 1-8 题均有四个选项，其中符合题意的选项只有 ．．一个． 1．自 2020年 1 月 23日起，我国仅用 10 天左右就完成了总建筑面积约为 113 800 平方米的 雷神山医院和火神山医院的建设，彰显了“中国速度” ．将 113 800 用科学记数法表示应 54 A )1.138 105 ( B ) 11.38 104 C )1.138 104 (D ) 0.1138 106 2．右图是某几何体的三视图，该几何体是 （ A ） 圆锥 （ B ）球 （ C ）长方体 （ D ） 圆柱 d 在数轴上的对应点的位置如图所示，这四个数中，相反数最大的是 4.一个不透明的袋中装有 8 个黄球， m 个红球， n 个白球，每个球除颜色外都相同．任意摸 出一个球，是黄球的概率与不是黄球的概率相同，下列 m 与 n 的关系一定正确的是 2020.5 3．实数 a ， b ，c ， A )a （B ）b （C ）c （D ）d 5. 如果a 3 1，那么代数式（1 a 11） 2 a 的值为 a 2 1 A ） B ） C ）
2018北京市朝阳区高三（一模） 地理 注意事项： 1.本试卷分第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分。答题前，考生务必将自己的姓名、考生号填写在答题卡上。 2. 回答第Ⅰ卷时，选出每小题的答案后，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。写在试卷上无效。 3. 回答第Ⅱ卷时，将答案填写在答题卡上，写在试卷上无效。 4. 考试结束，将本试卷和答题卡一并交回。 第Ⅰ卷 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。 北京时间2017年9月15日19时55分卡西尼号土星探测器发出的最后信号被地球接收。土星的黄赤交角为26.73°，图1为土星照片。据此完成第1-2题。 1.土星 A. 与地球和木星相邻 B. 光环为无数小卫星发射光线所致 C. 表面温度较地球高 D. 出现极昼的最低纬度较地球低 2. 最后信号 A. 被地球接收时，旧金山(37°48′N,122°25′W)所在时区的时间为15日3时55分 B. 被地球接收时，孟买(18°56′N,72°49′E)已进入黑夜 C. 被地球接收后的一周内，珀斯(31°52′S,1l5°53′E)正午的日影变长 D. 被地球接收后的一周内，北京升旗时间越来越早 2018 年1月7 日撒哈拉沙漠边缘的艾因塞弗拉镇降下了38 年来的第三场雪,该地前两次降雪分别在2016年和2017 年。专家认为，该地近年来出现的降雪与北极地区海冰融化加快致使欧洲寒潮增强有关。图2为相关地区多年1月等压线形势示意图,图3为艾因塞弗拉镇所在地区地形图。读图,完成第3-4题。
2019北京市朝阳区初三一模 化学 2019.5 学校班级姓名考号 考 生 须 知 1．本试卷共6页，共24道小题，满分45分。 2．在试卷和答题卡上准确填写学校名称、班级、姓名和考号。 3．试题答案一律填涂或书写在答题卡上，在试卷上作答无效。 4．在答题卡上，选择题用2B铅笔作答，其他试题用黑色字迹签字笔作答。 第一部分选择题（共12分） （每小题只有一个选项符合题意。每小题1分） 1．1滴水中大约有1.67×1021个水分子，说明 A．分子很小 B．分子可分 C．分子在运动 D．分子间有间隔 2．去除粗盐中难溶性杂质的实验步骤中，均用到的一种仪器是 A．烧杯 B．量筒 C．玻璃棒 D．漏斗 3．下列人体所必需的元素中，缺乏会引起骨质疏松的是 A．铁 B．锌 C．碘 D．钙 4．配制一定溶质质量分数的氯化钠溶液，下列操作不正确的是 5．下列物质属于纯净物的是 A．蒸馏水 B．豆浆 C．牛奶 D．雪碧 6．下列符号能表示2个氯分子的是 A．Cl2 B．2Cl2 C．2Cl D．2Cl- 7．木炭在氧气中燃烧并检验生成物的实验如下图，下列说法不正确的是 A．燃烧发白光 B．该反应放热
C．生成一种无色气体 D．烧杯中的物质是水 8．下列物质的用途和性质，对应关系不正确的是 A．铁锅炒菜——导热性 B．二氧化碳制碳酸饮料——与水反应 C．盐酸除铁锈——与金属反应 D．熟石灰改良酸性土壤——与酸反应 9．用数轴表示某些化学知识直观、简明、易记。下列用数轴表示的化学知识，不正确的是A．生活中常见物质的pH： B．地壳中部分元素的含量： C．空气中部分成分的含量： D．部分金属的活动性顺序： 10．下图是某反应的微观示意图。下列说法不正确的是 A．甲中氢、硫元素的质量比为1:16 B．反应后硫元素的化合价为+4 C．参加反应的甲、乙分子个数比为1:2 D．反应后分子总数减少 依据溶解度曲线和实验回答11~12题。 R是硝酸钾或氯化铵中的一种，硝酸钾和氯化铵的溶解度曲线如图1所示。某化学小组进行了如图2所示实验。 11．①中溶液的质量为 A．210 g B．160 g C．150 g D．60 g 12．关于图2中烧杯内的物质，下列说法正确的是 A．①、②中，溶液的溶质质量分数相等 B．使③中的固体溶解，可采用降温的方法