南昌二中2020┄2021学年度上学期第一次考试
高三英语试卷
第一部分听力（共两小节，共30分）
第一节（共5小题，共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。
1. What does the woman mean？
A. It is too late to say that.
B. The man will never win.
C. She asked the man not to give up.
2. How does the woman feel about driving to work？
A. Tired.
B. Good.
C. Bored.
3. What is the woman doing？
A. Asking for a favor.
B. Giving advice.
C. Offering help.
4. When should the man return the book？
A. June 6th
B. June 7th
C. June 9th
5. Where is the man going？
A. To a park.
B. To a party.
C. To a school.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，回答第6、7题。
6. What festival is it the day after tomorrow？
A. Christmas.
B. Halloween.
C. Thanksgiving.
7. Who will the woman have dinner with on Christmas？
A. Sam
B. Paul.
C. Paul’s parents
听第7段材料，回答第8、9题。
8. What did the man buy last week？
A. A bag.
B. A clock.
C. A watch.
9. What does the woman ask for？
A. A check.
B. An alarm
C.A receipt.
听第8段材料，回答第10至12题。
10. How long will the man probably stay in New Zealand？
A. One week.
B. Two weeks.
C. Three weeks.
11. What advice does the woman give to the man？
A. Booking his flight as soon as possible.
B. Going to New Zealand after Christmas.
C. Saving more money for his trip.
12. How does the woman feel in the end？
A. Annoyed.
B. Pleased.
C. Excited.听第9段材料，回答第13至16题。
13. How long is the journey？
A. 5km.
B. 10km.
C. 15km.
14. Why doesn’t the man take exercise often？
A. He isn’t interested in it.
B. He is healthy enough.
C. He has no time for it.
15. What can we learn about the man’s life？
A. He eats a lot and sleeps a little.
B. He eats an unbalanced diet and sleeps late.
C. He eats junk food and sleeps early.
16. What’s the man’s attitude to the woman’s words？
A. Happy.
B. Thankful.
C. Impatient.听第10段材料，回答第17至20题。
17. How many ways are mentioned to help the environment？
A. Two.
B. Three.
C. Four.
18. What can we learn about some laws helping the environment？
A. Helping people to save resources.
B. Being against driving the cars.
C. Helping learn information in school.
19. What can people do on their own to help the environment？
A. Control the population.
B. Work at home.
C. Refuse harmful products.
20. What new resources can we find in the future according to the speaker？
A. Mechanical energy and atomic power.
B. Atomic power and solar energy.
C. Electric energy and solar energy.
第二部分阅读理解（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和D）中，选出最佳选项。
A
Our oldest daughter is having trouble letting go of an old red sofa.
It’s not the sofa she’s having trouble letting go of as much as the memories. It was their first sofa. It has been loaded and unloaded onto moving trucks seven times. Three kids have eaten on it, dripped on it, and jumped on it.
Yet she’s having a hard time letting go and asked if I thought that was strange.“Completely,” I said. “You get it from me.”
When we were ready to get rid of our baby things, I sold our crib （婴儿床）at the neighborhood garage sale. I had pieces of it in the garage and the other pieces of it still in the house. A young woman said she wanted to buy it.
My throat tightened and the tears began to well. She pulled out cash and I cheered up.
But by the time I returned with the other pieces to the crib, I was all sobbing. “Have you consid ered that maybe you’re not ready to sell it？” the woman asked.
“No-o-o-o,” I cried. “It’s fine, really,” I said. “Take it.”
Our attachment to stuff grows in direct relationship to the amount of time it has sat in one place. The longer it sits, the harder it is to get rid of it. You think：“Hey, we’ve hung onto it this long –it must be valuable!” As though yellowing and a layer of dust increase value.
People who find it extremely hard to part with things have been made into entertainment in a television show called Hoarders. If an episode （集）of that isn’t depressing enough for you, producers now offer Extreme Hoarders. Both of which are not to be outdone by Storage Wars, a show about aggressive people who bid on other people’s storage units.
Let the sofa go, I told my daughter. It served its purpose. You can get a new one. Give the kids some crackers （饼干） and juice and it will be like the old one in six weeks.
21. What does the author mean by saying the underlined sentence “You get it from me”？
A. “You can get another sofa from me.”
B. “You can get mental support from me.”
C. “You behave just the same way I do.”
D. “You are asking the right person to help you.”
22. When the writer was selling the crib, _____.
A. she felt relieved that there was someone willing to buy it
B. she showed a strong attachment to the old item
C. she couldn’t decide whether or not to sell it in the end
D. she changed her mind in hopes of keeping it and increasing its value
23. The writer refers to the television shows to _____.
A. prove that it’s depressing to get attached to old stuff
B. explain what contributes to people’s attachment to old stuff
C. show that people in TV shows live the same lives as ordinary people do
D. prove that it’s actually common for people to find it hard to get rid of old stuff
24. Which opinion might the writer agree with according to the article？
A. If you give away old stuff regularly, you are wasteful.
B. If the old stuff has done what it was supposed to, then let it go.
C. Nothing is more valuable than your love for your old stuff.
D. The older your stuff is, the less trouble you have getting rid of it.
B
George Gershwin, born in 1898, was one of America’s greatest composers. He published his first song when he was eighteen years old. During the next twenty years he wrote more than five hundred songs.
Many of Gershwin’s songs were first written for musical plays performed in theatres in New York City. These plays were a popular form of entertainment in the 1920s and 1930s. Many of his songs have remained popular as ever. Over the years they have been sung and played in every possible way—from jazz to country.
In the 1920s there was a debate in the United States about jazz music. Could jazz, some people asked, be considered serious music？In 1924 jazz musician and orchestra leader Paul Whiteman decided to organize a special concert to show that jazz was serious music. Gershwin agreed to compose something for the concert before he realized he had just a few weeks to do
it. And in that short time, he composed a piece for piano and orchestra which he called Rhapsody in Blue. Gershwin himself played the piano at the concert. The audience were thrilled when they heard his music. It made him world-famous and showed that jazz music could be both serious and popular.
In 1928, Gershwin went to Paris. He applied to study composition（作曲）with the well-known musician Nadia Boulanger, but she rejected him. She was afraid that classical study would ruin his jazz-influenced style. While there, Gershwin wrote An American in Paris. When it was first performed, critics（评论家）were divided over the music. Some called it happy and full of life, to others it was silly and boring. But it quickly became popular in Europe and the United States. It still remains one of his most famous works.
George Gershwin died in 1937, just days after doctors learned he had brain cancer. He was only thirty-nine years old. Newspapers all over the world reported his death on their front pages. People mourned the loss of the man and all the music he might have still written.
25. Many of Gershwin’s musical works were.
A. written about New Yorkers
B. composed for Paul Whiteman
C. played mainly in the countryside
D. performed in various ways
26. What did Gershwin do during his stay in Paris？
A. He created one of his best works.
B. He studied with Nadia Boulanger.
C. He argued with French critics.
D. He changed his music style.
27. What do we learn from the last paragraph？
A. Many of Gershwin’s works were lost.
B. The death of Gershwin was widely reported.
C. A concert was held in memory of Gershwin.
D. Brain cancer research started after Gershwin’s death.
28. Which of the following best describes Gershwin？
A. Talented and productive.
B. Serious and boring.
C. Popular and unhappy.
D. Friendly and honest.
C
Guide to Stockholm University Library
Our library offers different types of studying places and provides a good studying environment.
Zones
The library is divided into different zones. The upper floor is a quiet zone with over a thousand places for silent reading, and places where you can sit and work with your own computer. The reading places consist mostly of tables and chairs. The ground floor is the zone where you can talk. Here you can find sofas and armchairs for group work.
Computers
You can use your own computer to connect to the wi-fi specially prepared for notebook computers; you can also use library computers, which contain the most commonly used applications, such as Microsoft Office. They are situated in the area known as the Experimental
Field on the ground floor.
Group-study Places
If you want to discuss freely without disturbing others, you can book a study room or sit at
a table on the ground floor. Some study rooms are for 2-3 people and others can hold up to 6-
8 people. All rooms are marked on the library maps.
There are 40 group-study rooms that must be booked via the website. To book, you need an active University account and a valid University card. You can use a room three hours per day, nine hours at most per week.
Storage of Study Material
The library has lockers for students to store course literature. When you have obtained at least 40 credits, you may rent a locker and pay 400 SEK for a year’s rental period.
Rules to be Followed
Mobile phone conversations are not permitted anywhere in the library. Keep your phone on silent as if you were in a lecture and exit the library if you need to receive calls.
Please note that food and fruit are forbidden in the library, but you are allowed to have drinks and sweets with you.
29. Library computers on the ground floor .
A. help students with their field experiments
B. contain software essential for schoolwork
C. are for those who want to access the wi-fi
D. are mostly used for filling out application forms
30. A student can rent a locker in the library if he .
A. can afford the rental fee
B. attends certain courses
C. has nowhere to put his books
D. has earned the required credits
31.What should NOT be brought into the library？
A. Mobile phones.
B. Orange juice.
C. Candy.
D. Sandwiches.
D
Last night’s meteor（流星）shower left many people in the community dissatisfied and demanding answers. According to Gabe Rothschild, Emerald Valley’s mayor, people gathered in the suburbs of the city, carrying heavy telescopes, expecting to watch the brightly burning meteors passing through the sky. What they found instead was a sky so brightened by the city’s lights that it darkened the light of the meteors passing overhead.
“My family was so frustrated, ”admitted town resident Duane Cosby. “We wanted to make this an unforgettable family outing, but it turned out to be a huge disappointment.”
Astronomers—scientists who study stars and planets—have been complaining about this problem for decades. They say that light pollution prevents them from seeing objects in the sky that they could see quite easily in the past. They call on people and the government to take measures to fight against it.
There is yet a population besides professional and amateur star observers that suffers even more from light pollution. This population consists of birds, bats, frogs, snakes, etc. For example, outdoor lighting severely affects migrating birds. According to the International Dark-Sky
Association.“100 million birds a year throughout North America die in crashes with lighted buildings and towers.”
Countless more animal casualties（伤亡）result from the use of artificial lighting. Clearly, people enjoy the benefits of lighting their evenings, but some scientists think it can be harmful for humans, too. T hey worry that exposure to light while sleeping can increase a person’s chances of getting cancer.
Emerald Valley is only one community that is becoming aware of the negative effects of light pollution. For years, Flagstaff, Arizona, has enforced lighting regulations in its city in order to assist astronomers at the Lowell Observatory. Similar efforts have been made worldwide, and a movement is underway to remind us to turn off lights when we are not using them, so that other creatures can share the night.
32. It happened last night that .
A. the city’s lights affected the meteor watching
B. the meteors flew past before being noticed
C. the city light show attracted many people
D. the meteor watching ended up a social outing
33. What do the astronomers complain about？
A. Meteor showers occur less often than before.
B. Their observation equipment is in poor repair.
C. Light pollution has remained unsolved for years.
D. Their eyesight is falling due to artificial lighting.
34. What is the author concerned about according to Paragraph 4？
A. Birds may take other migration paths.
B. Animals’ living habits may change suddenly.
C. Varieties of animals will become sharply reduced.
D. Animals’ survival is threatened by outdoor lighting.
35. What message does the author most want to give us？
A. Saving wildlife is saving ourselves.
B. Great efforts should be made to save energy.
C. Human activities should be environmentally friendly.
D. New equipment should be introduced for space study.
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。
How to Improve Eyesight Naturally
Eyes are important for everybody. You must take care and try everything in your hand to keep them in good condition. Here are some of the tips to improve your eyesight naturally.
36
Strain is known to be a factor in many health conditions and eyestrain is no exception. Try meditation, yoga or other methods of stress relief to improve your vision and overall health.
Try palming.
Sit upright in a comfortable chair. 37 Cup your hands so that there is no pressure on your eyes. Let your fingers rest across your forehead. There should be no light entering your
eyes. Palming should be done for a period of 5 to 10 minutes to start. Palming should be relaxing. It may help to do palming in a darkened room.
Avoid sugar as much as possible.
38 It will unpleasantly affect your eyesight, which affects the eyes by producing a larger amount of insulin （胰岛素）in the blood. Therefore you shouldn’t be having much fruit juice or something that contains a lot of sugar.
Exercise your eyes.
The only exercise most eyes get is that daily rubbing we give them when we're tired or suffering from eyestrain. But eye exercises are actually good for your eyes and can improve your vision. 39 Blink as fast as you can for a few seconds then close your eyes tightly, open and repeat. Do this exercise 3 to 4 times daily.
Eat healthy.
You probably hear that statement all the time but eating the right foods are necessary to good health. 40 Foods that are high in fiber, vitamin C, D and beta carotene as well as other vitamins and minerals can help improve your vision. Here are a few foods that can be beneficial to good vision：carrots, eggs, blueberries, spinach, kale, grapes, and fresh garlic.
A. Reduce eyestrain.
B. Keep your eyes moist.
C. Sugar is your eye’s worst enemy.
D. Give your eyes a workout with the following exercise.
E. You may not be aware that your diet affects your vision but it does.
F. Close eyes and cover them with the palms of your hands.
G. Be sure to get plenty of sleep so your eyes don’t strain to stay open during the day.
第三部分英语知识运用（共两节，满分45分）
第一节完形填空（共20小题；每题1.5分，满分30分）
阅读下面短文，从短文后各题所给的四个选项（A, B, C和D）中，选出可以填入空白处的最佳选项。
At a gathering, we were all telling stories of our most embarrassing moments. It came around to Frank. Frank began to tell us of his childhood. "I 41 in San Pedro. My Dad was a fisherman, and he loved the sea. He had his own boat, but it was 42 making a living on the sea. He worked hard and would stay out until he caught enough to 43 the family." He looked at us and said, "I 44 you could have met my Dad. He was a big man, and he was strong from pulling the nets and fighting the seas for the 45 . When you got close to him, he 46 like the ocean. He would wear his old coat and his overalls. No matter how much my mother 47 them, they would still smell of the sea and of fish." Frank's voice dropped a bit. "When the weather was bad he would 48 me to school. He had this old truck that was older than he was 49 he would drive toward the school, I would shrink down into the seat hoping to disappear. He would 50 right in front of the school gate, and it seemed like everybody 51 be standing around and watching. Then he would 52 over and give me a big kiss on the cheek and tell me to be a good boy. It was so 53 for me. I was twelve years old, and my Dad would lean over and kiss me goodbye!" He 54 and then went on, "I remember the day when I said 'No' ” It was the first time I had ever talked to him that 55 , and he had this surprised look on his face.
I said, 'Dad, I'm too 56 for a goodbye kiss. ' My Dad looked at me for the longest time, and his eyes started to tear up. I had never seen him 57 . He turned and looked out the windshield（挡风玻璃）. 'You're right,' he said. 'You are
a big boy....a man. I won't kiss you anymore.'” Frank got a sad look on his face, and the tears began to 58 in his eyes, as he spoke. "It wasn't long after that when my Dad went to sea and never came back.” Tears were running down Frank’s cheeks. He spoke again. "Guys, you don't know what I would 59 to have my Dad give me just one more kiss on the cheek....to feel his rough old face....to smell the ocean on him....to feel his arm around my neck. I wish I had been a man then. If I had been a 60 , I would never have told my Dad I was too old for a goodbye kiss."
41. A. kept up B. grew up C. came up D. started up
42. A. hard B. absurd C. easy D. necessary
43. A. remove B. reach C. feed D. urge
44. A. prefer B. request C. suggest D. wish
45. A. fish B. favorite C. benefit D. glory
46. A. sounded B. looked C. smelled D. felt
47. A. processed B. washed C. handled D. managed
48. A. drive B. limit C. adapt D. devote
49. A. Before B. After C. Since D. As
50. A. back up B. pick up C. pull up D. speed up
51. A. could B. would C. should D. might
52. A. lean B. hold C. run D. watch
53. A. frightening B. challenging C. embarrassing D. entertaining
54. A. recovered B. paused C. requested D. admitted
55. A. day B. time C. aspect D. way
56. A. old B. delighted C. anxious D. proud
57. A. sigh B. shout C. cry D. yell[
58. A. break down B. hold back C. well up D. start off
59. A. demand B. give C. rush D. infer
60. A. boy B. seaman C. backbone D. man
第二节语法填空：（每小题1.5分，共15分）
阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
If you’re a fan of The Hunger Games, you shouldn’t miss another trilogy called Divergent. The second book, by US author Veronica Roth, 61.______ （publish）in It has spent 105 weeks on the USA Today best-selling books list and 62.______ （current） ranks No 1.
The trilogy’s story begins in a futuristic Chicago 63.______ people are divided into five distinct groups. Each group is characterized by certain traits –Abnegation （the selfless）, Dauntless （the brave）, Erudite （the intelligent）, Amity （the peaceful） and Candor （the honest）. Every child, at 16, takes a test 64.______ （see） which of the five factions he or she belongs to. But Beatrice Prior, born in Abnegation, is qualified 65.______ three, meaning she is a Divergent. And she is told not to tell 66.______ if she wants to stay alive.
So the decision is between staying with her family or being true to herself. Beatrice ends up 67.______ （choose） the Dauntless. After joining her new group, Beatrice renames herself Tris and tries to prove her 68.______ （brave） with amazing things like jumping off a moving train onto a rooftop. While undergoing these extreme physical tests, Tris must also determine who her real friends are.
The story of the trilogy “explores a more common adolescent anxiety –the painful realization 69.______ coming into one’s own sometimes means leaving family behind, both ideologically 70.______ physically”, commented The New York Times.
第四部分写作（共两节，满分35分）
第一节短文改错（共10小题；每小题1分，满分10分）
Dear editor,
I’m sorry to occupy your precious time, and I really want to tell you anything about the problem of some people keeping too many pets nowadays. I take the problem more and more seriously for the following reason. First of all, as it is known to people, pets make loud noise that trouble residents a lot. What’s more, it is widely accepted that animal waste pollutes the environment, where makes people quite uncomfortable. Many owners like taking their pets to public place where they may frighten children or even bite people. The mostly important is that pets can spread some diseases and this has attracted much attention. T ake all these factors into consideration, I sincerely hope that I can get help from you and expect the media do something for this.
Yours truly,
Wang Lin
第二节书面表达（25分）
假如你叫李华，你和父母在英国旅游期间于1月28日至30日入住Forest Hotel酒店，但对其提供的服务不满意，请发电子邮件给酒店的管理者进行投诉，要求其道歉并改进服务质量。1. 搬运工送到房间的皮箱破损；2. 卫生间漏水；3. 楼下酒吧有噪音，并持续到很晚，影响休息。
注意：1. 文章必须包括所有要点。可适当增加细节，以使文章连贯。
2. 词数100，文章开头结尾已给出，不计入总词数
3. 参考词汇：搬运工porter n; 皮箱suitcase n; 漏水leak vi.
Dear Manager,
My name is Li Hua. I stayed at your hotel__________________________Yours sincerely,
Li Hua
南昌二中2020┄2021学年度上学期第一次考试
高三英语试卷参考答案
听力：
1~5 CBBCB 6~10 CABCC 11~15 AABCB 16~20 CBACB
阅读理解：
21-24 CBDB 25-28 DABA 29-31 BDD 32-35 ACDC
七选五
36-40 AFCDE
完形填空
41-45 BACDA 46-50 CBADC 51-55 BACBD 56-60 ACCBD
语法填空：
61. was published 62. currently 63. where/in which 64. to see 65. for 66. anyone/others 67. choosing 68. bravery 69. that 70. and
短文改错：
71. and→but
72. anything →something
73. reason→ reasons
74. 去掉it
75. trouble→troubles
76. where→which
77. place→places
78. mostly→most
79. T ake→Taking
80. do→to do
书面表达
Dear Manager,
My name is Li Hua. I stayed at your hotel, Forest Hotel, during my visit to the UK from Jan 28 to 30 with my parents. However, the service in your hotel left much to be desired. I’m writing this email to express my opinion.
First, we found our suitcases broken after they were carried to our room by one of your porters. Second, water was leaking out of the toilet in the bathroom. Third, the noise from the bar downstairs went on so late into the night each night that we couldn’t get good rest.
For the above reasons, I have to say that the service in your hotel is of poor quality. Therefore, I would like to receive a written apology from you. Meanwhile, I hope you can improve your service in the future so that none of the above happens again.
Yours sincerely,
LI HUA
听力原文
（Text 1）
M：There is no way for me to win this competition.
W：Never say never.
（Text 2）
M:I hear you drive very far to work every day.
W：Yes. I live about sixty miles away, but it doesn’t seem that far. The road isn’t bad, and there’s not much traffic.
（Text 3）
W：If you’re going to read there, please turn on the light.
M:I can see, Mom.
W：But you’ll ruin your eyes that way. Now please go and switch on the light, or move to a brighter spot.
（Text 4）
M:Is there any chance that I could borrow your new book？
W：When will you return it？
M：Today is Monday, June 6th.How about Thursday afternoon？
W：Yes, I guess that would be all right.
（Text 5）
第I卷（选择题） 一、单选题 1.科学家在利用无土栽培法培养一些名贵花卉时，培养液中添加了多种必需的化学元素,其配方如下表： 其中植物根细胞吸收量最少的离子是 A．Ca２+ B.Ｈ2PO3— C. SO42— D．Ｚn2+ 2.关于细胞中元素的叙述,错误的是 A.番茄和水稻根系吸Si元素的量有差异 B.在人体活细胞中氢原子的数目最多 C.地壳和活细胞中含量最多的元素都是氧元素，由此看出生物界和非生物界具有统一性 D.在人体细胞干重中C元素含量最多,是因为细胞中含有大量的有机化合物 ３。用含32P的磷酸盐培养液培养动物细胞,一段时间后，细胞的结构以及化合物中具有放射性的是 ①脱氧核糖 ②细胞核 ③DＮＡ ④核糖 ⑤RNA Ａ．①③ B.①③⑤ C.②③⑤Ｄ.②③④⑤ ４.对下面柱形图的相关含义叙述中，不正确的是A.若Y表示细胞中有机物的含量，ａ、ｂ、c、d表示四种不同的物质,则b最有可能是蛋白质 B.若Y表示组成活细胞的元素含量,则a、b、c、d依次是N、O、H、Ｃ Ｃ．若Y表示一段时间后不同离子在培养液中所占原来的比例，则该培养液中培养的植物,其根细胞膜上ａ离子的载体少于c离子的载体 D．若Y表示细胞液的浓度,ａ、b、c、ｄ表示不同细胞，则在0。３ｇ／ｍL蔗糖溶液中，发生质壁分离的可能性大小为b 江西省南昌市南昌二中2020-2021学年九年级 （上）期中考试物理试题 学校_________ 班级__________ 姓名__________ 学号__________ 一、填空题 1. 物理学的发展离不开广大物理学家不懈的探索和无私的奉献，为了纪念杰出的物理学家，人们将物理学家______的名字命名为电阻的单位，以物理学家 ______的名字命名为内能的单位。 2. 将丝绸摩擦过的玻璃棒去接触不带电的验电器的金属球，就有一部分 ______(选填“正电荷从玻璃棒移到金属铂’或‘电子从金属箔移动到玻璃棒”)上，两箔片就张开，如图所示，则两箔片带上的是______(填“正”或“负”) 电荷。 3. 如图所示是汽油机工作时的各种冲程示意图，其中表示为内能转化为机械能的冲程是图______，若它的飞轮转速为1800r/min，则该汽油机每秒对外做功 ______次。 4. 青少年在安静地思考问题的时候，心脏推动血液流动的功率约为，则 你在考试的内，心脏做功约为________J，相当于一个体重的人 登高_______m。 5. 新冠肺炎疫情中，每天要对市区环境进行消杀杀菌。一辆正在喷洒消毒液的汽车匀速行驶在水平街道上，汽车的总动能将逐渐_________，机械能将 __________。（均选填“变大”“变小”或“不变”） 6. 把图钉帽在课桌上来回摩擦几下后，图钉帽热得烫手，这是用______的方法改变了物体的内能；把瓶装水放在冰箱里，一会儿变凉了，这是用______的方法改变了物体的内能． 7. 如图甲所示的电路中，当闭合开关后，两个电压表指针偏转均如图乙所示， 则电灯L 1和L 2 两端的电压分别为_______V和 _________V． 8. 如图所示，小强在30s内用滑轮组将物体A沿水平方向匀速移动6m，已知物体A重800N，它受到的摩擦力为60N，小强所用的拉力为25N，则A的重力 做功______J，此滑轮组的机械效率为______。 9. 某段金属丝两端电压为6V时，通过的电流为0.3A；当该金属丝两端电压降为4V时，通过它的电流为_____A；当该金属丝两端电压降为0V时，它的电阻为_____Ω． 10. 两个电阻R1=6Ω，R2=4Ω，串联起来接入电路，通过它们的电流之比 I 1 ∶I2=_________，若把R1、R2并联接入电路，则此时通过它们的电流之比 I 1 '∶I2'=_________。 二、单选题 11. 下列说法正确的是（） A．做功越多，功率越大B．做功越快，功率越大 C．功率越大的机械越省力D．功率越大的机械效率越高 12. 如图所示是一个两面光滑的斜面，∠α小于∠β，同一个物体分别在AC 和BC受拉力匀速运动到C点，所需的拉力分别为F A和F B所做的功分别为W A和 江西省南昌二中、临川一中2017届高三下学期期中联考英语试卷 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. 1．Where are the speakers going? A．To New York B．To Canada C．To Mexico 2．Why can’t Tim take Jenny’s shift? A．He has a soccer game. B．He is on vacation. C．He has to go to a funeral. 3．What does the woman mean? A．There is a bomb in the refrigerator. B．They will probably run out of food. C．More than enough food has been prepared. 4．What subject does the woman think less difficult? A．Literature B．History C．Mathematics 5．What did the woman study in college? A．Business B．Art C．Spanish 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,各个小题将给出5秒钟的作答时间.每段对话或独白读两遍. 听下面一段对话,回答第6-7题. 6．What happened to Miguel last weekend? A．He lost his textbook. B．He took care of his grandma. C．His house was burned to the ground. 7．Why will Miguel be late to Ms. Perry’s office? A．He has to buy his lunch. B．He had to do his homework. C．He has to make food for his grandma. 听下面一段对话,回答第8-10题. 8．What does the man do for his job? A．He cleans houses. B．He does paperwork. C．He sells houses. 9．When does the conversation take place? A．On Thursday B．On the weekend. C．On Friday 10．Why does the woman recommend the man her friend? A．She is moving. B．She enjoyed working with him. C．Her friend is moving to Springfield. 听下面一段对话,回答第11-13题. 11．How old is Sam? A．He’s in college.B．He’s in high school.C．He’s still a young kid. 江西省南昌二中2020届高三高考数学（文科）校测试题（一）一、单选题 (★★★) 1. 已知全集，集合，则（） A．B．C．D． (★★★) 2. 若复数，为虚数单位，则 A．B．C．D． (★★★) 3. 已知实数，则“ ”是“ ”的 A．充分不必要条件B．必要不充分条件 C．充要条件D．既不充分也不必要条件 (★★★) 4. 若函数的图象的一条对称轴为，则的最小值为（） A．B．C．D． (★★★) 5. 已知数列为等比数列，是它的前项和，若，且与的等差中项为，则（）． A．B．C．D． (★) 6. 已知向量，，且，则（） A．B．C．D． (★★) 7. 我国明朝数学家程大位著的《算法统筹》里有一道闻名世界的题目：“一百馒头一百僧，大僧三个更无争，小僧三人分一个，大小和尚各几丁？”以下程序框图反映了对此题的一个求解算法，则输出的的值为（） A．20B．25C．30D．75 (★★★) 8. 已知某样本的容量为50，平均数为70，方差为75．现发现在收集这些数据时，其中的两个数据记录有误，一个错将80记录为60，另一个错将70记录为90．在对错误的数据进行更正后，重新求得样本的平均数为，方差为，则（） A．B． C．D． (★★★) 9. 下列图象可以作为函数的图象的有（） A．1个B．2个C．3个D．4个 (★★★) 10. 已知 P， A， B， C是半径为2的球面上的点， O为球心，，，则三棱锥体积的最大值是( ) A．B．1C．D． (★★★)11. 已知，分别是双曲线的左，右焦点，动点在双曲线的左支上，点为圆上一动点，则的最小值为（） A．7B．8C．D． (★★★) 12. 若函数有最大值，则实数的取值范围是（） A．B． C．，D． 二、填空题 (★★) 13. 函数的图象在处的切线与直线互相垂直 ,则_____. (★★★) 14. 如图在平行四边形中，，，为边的中点，，若，则___________. (★★★)15. 如图，在一个底面边长为 cm的正六棱柱容器内有一个半径为 cm的铁球，现向容器内注水，使得铁球完全浸入水中，若将铁球从容器中取出，则水面下降 ______ cm. (★★★) 16. 在数列中，，，是数列的前 项和，则为___________. 三、解答题 【最新】江西南昌二中高三上三模地理试卷学校:___________姓名：___________班级：___________考号：___________ 一、单选题 某学校地理兴趣小组做了如下实验：做两个相同规格的玻璃箱（如下图），甲底部放一层土，中午同时把两个玻璃箱放在日光下，十五分钟后，同时测玻璃箱里的气温，结果发现底部放土的比没有放土的足足高了3℃。据此回答下列各题。 1．该实验主要目的是测试（） A．大气的温室效应 B．大气的热力运动 C．一天中最高气温出现的时刻 D．大气主要的直接热源 2．甲箱温度比乙箱温度高的原因是（） A．太阳辐射强弱差异 B．地面辐射强弱差异 C．大气吸热强弱差异 D．大气辐射强弱差异 读“某年11月7日(立冬)我国大陆部分各地季节状况图”，回答下面小题。 3．形成图中我国各地在同一天出现有三种季节的主要原因是( ) A．海陆热力性质差异B．地形地貌地区差异 C．各地纬度差异大D．各地经度差异大 4．立冬日，南部沿海地区仍处在夏季的主要原因是( ) A．位于低纬，太阳高度小B．南岭阻挡弱冷空气南下 C．临海比热容大，气温高D．刚好有台风登陆，气温高 5．此时由西南到长江以南地区形成大范围降雨，其形成原因最可能是( ) A．受副热带高压控制B．锋面在附近活动 C．山地抬升偏北风D．受台风登陆影响 下图表示我国地理“四极”特征变化趋势图,据此回答下列各题。 6．下列因素对“四极”形成影响不大的是( ) A．纬度位置B．海陆位置C．地形起伏D．洋流 7．影响图中甲地区农业发展的直接限制性因素是( ) A．光照弱B．气温低 C．降水少D．冻土分布广 下面是一幅世界地图的一段纬线，P点以东是海洋，Q点以西是海洋，S和T 之间为某一海域。 判断下列各题。 8．S～T之间的海域是( ) A．波斯湾B．墨西哥湾C．红海D．莫桑比克海峡9．实际观测表明，P海岸降水明显多于T海岸，其主要影响因素是( ) A．洋流B．地形C．季风D．气压带、风带 2019年江西省名校临川一中·南昌二中第二次联合考试 英语 第一部分听力（共两节，满分30分） 该部分分为第一、第二两节。注意：回答听力部分时，请先将答案标在试卷上。听力部分结束前，你将有两分钟的时间将你的答案转涂到答题卡上。 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。 1. What will the man do this weekend? A. Meet his professor. B. See a movie. C. Do a project. 2. How much will the man pay? A. $50. B. $100. C. $200. 3. Where will the speakers go? A. To a Thai restaurant. B. To an Italian restaurant. C. To a Mexican restaurant. 4. What does the man mean? A. The film is terrible. B. The film can be seen online. C. The film is worth the money. 5. Where does the conversation probably take place? A. At home. B. At a hospital. C. At a drug store. 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，回答第6、7题。 6. Why does the woman call the man? A. To change the address. B. To check on a delivery. C. To order a pair of shoes. 7. When will the shoes arrive? A. On March 10th. B. On March 7th. C. On March 5th. 江西省南昌二中2014届高三高考模拟考试 文综试题 一、单项选择题 A．①浙江、②海南、③青海、④河南B．①青海、②浙江、③海南、④河南C．①海南、②浙江、③青海、④河南D．①浙江、②青海、③河南、④海南2．下列关于各省的说法不正确的 A．①省份人口年增长率大主要是外来人口迁入造成 B．②省份第三产业比重最高，说明经济发展水平最高 C．③省份目前经济发展水平最低 D．四个省份中①省份老龄化程度最重 下图是塔里木盆地南缘绿洲附近的约特干古城遗址某处地层剖面图，完成3—4题。 3．约特干古城遗址的文化层被埋藏在地下的原因有 ①板块张裂地层下陷②河流带来的泥沙沉积 ③周围风沙的沉积④冰川带来的冰碛物堆积 A．①② B．①③ C．②③D．③④ 4．据该地层剖面图，可推知约特干古城遗址自然环境变化的特点是 A．1000年以来气候稳定不变 B．2000年以来沉积速度加快 C．6000年以来湿润期大于干旱期D．距今8000年开始出现绿洲 浙江省山地丘陵广布，适宜茶树的生长，但春季易受霜冻天气影响。为此，当地茶园引进了“防霜冻风扇”（如图4）。当夜晚温度降到4℃时，风扇会自动打开，从而减轻霜冻对茶树的伤害。图5“为茶园某时气温垂直分布示意图”，据此回答5—6题。 5．“防霜冻风扇”最适宜的安装高度为 A．9-10米B．7-8米C．6-7米D．4米以下 6．关于风扇的作用原理正确的是 ①风扇可以把高处的暖空气往下吹到茶树上 ②风扇吹出的热风可以使茶树免受霜冻影响 ③风扇的转动可以增强近地面对流运动程度 ④风扇转动可带动空气流动，阻止上层冷空气下压 A．①③B．②④C．②③D．①④ 地表常流性河道频率指的是以一直线截取某一地区，求取被直线切割的河道数与该直线长度之比。下图表示我国年降水量、年径流曲线与河道频率的南北地带变化。读下图，回答7—9题。 7．图中三条曲线分别表示 A．①河道频率②径流量③年降水量B．①河道频率②年降水量③径流量 C．①径流量②河道频率③年降水量D．①年降水量②径流量③河道频率8．图中常年性河道频率最大的地区是 A．江南丘陵B．长江中下游地区C．东北平原D．内蒙古高原9．下列有关河道频率南北地带变化的叙述正确的是 A．水系密度的空间分异与径流量的变化趋势呈反相关 B．华北平原地表物质渗透性强，径流量偏小，故河道频率偏小 C．东北河道频率高于华北的主要原因是年降水量显著增多 D．湛江以北石灰岩地区大量地表水转为地下水，使地表常流性河道频率达到最大值图6中，圆O1、圆O2、圆O3分别为某日三个时刻的80°等太阳高度线（太阳直射点的纬度变化忽略不计），其中，n为纬线，此时北京昼长夜短。读图6，完成10—11题。 一、选择题（1－24题,每小题１分；25－３０题,每小题２分，共36分。每题均只有一个正确选项） 1.若呼吸底物全为葡萄糖,下列关于人体呼吸作用的叙述，正确的是 Ａ．８００ｍ慢跑过程中O２吸收量大约等于CO２释放量 B.马拉松比赛时消耗等量葡萄糖放出的能量比步行时多 C．环境温度从0℃升到37℃，人体呼吸作用相关酶的活性逐渐上升 Ｄ.包扎伤口应选用透气性好的“创可贴"，主要目的是保证伤口处细胞的有氧呼吸 2.当酵母菌以葡萄糖为呼吸底物时,下列叙述正确的是 A.如果检测有ＣO２释放量，则说明酵母菌进行有氧呼吸 B．如果测得CO２释放量：O2吸收量等于１：1,则说明酵母菌只进行有氧呼吸 C.如果测得呼吸作用的过程中没有产生水，则产物中也不会有CO２ D．检测酒精可用重铬酸钾，溶液的颜色由灰绿色变为橙色 3．光合作用是生物界中重要的物质与能量代谢，下列有关叙述正确的是 A.给绿色植物提供含有Ｈ２18Ｏ的水,含1８Ｏ的物质只有释放出来的O２ B.根据光合作用释放的O2量,可以推算出光合作用中有机物的积累量 C.停止光照,暗反应很快会停止，而停止供应ＣO2则光反应不受影响 D．生产生活中,温室大棚普遍采用红色的塑料薄膜来提高作物产量 4．某科研小组为探究酵母菌的细胞呼吸方式，进行了如图所示实验(假设细胞呼吸产生的热量不会使瓶中的气压升高),开始时溴麝香草酚蓝水溶液的颜色基本不变，反应一段时间后溶液颜色由蓝变绿再逐渐变黄。下列有关分析正确的是 A.溴麝香草酚蓝水溶液颜色由蓝变绿再变黄说明酵母菌在不断地产生CO２ B.溴麝香草酚蓝水溶液的颜色一开始不变是因为酵母菌只进行了有氧呼吸 2017-2018学年江西省南昌二中高二（上）期末数学试卷（理科） 一、选择题（本大题共12小题，每小题5分，共60分．每小题只有一个选项 符合题意．） 1．（5分）证明不等式“”最适合的方法是（）A．综合法B．分析法C．反证法D．数学归纳法2．（5分）命题“?x∈R，?a∈R，使得n＞|x﹣1|﹣|x﹣2|”的否定形式是（）A．?x∈R，?a∈R，使得n≤|x﹣1|﹣|x﹣2| B．?x∈R，?a∈R，使得n≤|x﹣1|﹣|x﹣2| C．?x∈R，?a∈R，使得n≤|x﹣1|﹣|x﹣2| D．?x∈R，?a∈R，使得n≤|x﹣1|﹣|x﹣2| 3．（5分）在复平面内，复数对应的点位于（）A．第一象限B．第二象限C．第三象限D．第四象限4．（5分）经过点（2，﹣4）且与双曲线有同渐近线的双曲线方程是（）A．B． C．D． 5．（5分）已知函数f（x）的导函数为f′（x），且满足f（x）=lnx+x2f′（1），则f′（1）=（） A．﹣1B．e C．﹣e D．1 6．（5分）设x，y，z都是正数，则三个数（）A．都大于2B．至少有一个不小于2 C．至少有一个大于2D．至少有一个不大于2 7．（5分）若关于x的不等式|x﹣2|+|x+a|＞4的解集为R，则实数a的取值范围为（） A．（﹣∞，﹣6）∪（2，+∞）B．（﹣6，2） C．（﹣∞，﹣6）∪（﹣2，+∞）D．（﹣6，﹣2） 8．（5分）在下列结论中，正确的结论为（） ①“p且q”为真是“p或q”为真的充分不必要条件 ②“p且q”为假是“p或q”为真的充分不必要条件 ③“p或q”为真是“￢p”为假的必要不充分条件 ④“￢p”为真是“p且q”为假的必要不充分条件． A．①②B．①③C．②④D．③④ 9．（5分）若不等式|2x﹣3|+|2x﹣5|＜4的解集为（a，b），则曲线与直线y=x﹣3及直线x=a，x=b所围成的封闭图形的面积为（） A．B．ln3C．D．ln3+2 10．（5分）已知函数f（x）=x3﹣3x，若过点M（3，t）可作曲线y=f（x）的三条切线，则实数t的取值范围是（） A．（﹣9，﹣8）B．（﹣18，18）C．（﹣18，6）D．（﹣6，6）11．（5分）若关于x的不等式k|x|﹣|x﹣2|＞0恰好有4个整数解，则实数k 的取值范围是（） A．B．C．D． 12．（5分）已知函数f（x）是定义在（0，+∞）的可导函数，f'（x）为其导函数，当x＞0且x≠1时，，若曲线y=f（x）在x=1处的切线的斜率为﹣1，则f（1）=（） A．B．0C．D．1 二、填空题（本大题共4小题，每小题5分，共20分） 13．（5分）已知a，b∈R，i是虚数单位，若a+2i=1﹣bi，则复数z=a+bi的模|z|=． 14．（5分）已知函数，则=． 15．（5分）在平面直角坐标系中，△ABC的顶点A、B分别是离心率为e的圆锥曲线的焦点，顶点C在该曲线上．一同学已正确地推得：当m＞n 绝密★启用前 江西省名校（临川一中、南昌二中） 2019届高三年级下学期第二次联考 英语试题 （解析版） 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.满分150分.考试时间为120分钟. 2本试卷分试题卷和答题卷，第Ⅰ卷（选择题）的答案应填在答题卷卷首相应的空格内，做在第Ⅰ卷的无效. 3答题前,考生务必将自己的姓名、准考证号填涂在答题卡相应的位置。 第Ⅰ卷（选择题,共100分） 第一部分听力 (共两节,满分30分) 第一节 (共5小题；每小题l.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 transportation did the man take? A. The bus. B. The taxi. C. The subway. 2. Why doesn't the man wear his yellow shirt? A. It's missing. B. He doesn't like it. C. Two buttons are off it. 3. What is Cindy's bad behavior in class? A. Sending text messages. B. Arguing with Mr. Jackson. C. Talking with her classmates. 4. What are the speakers mainly talking about? A. Details of the report. 2020届江西省南昌二中高三高考校测（一）数学（文）试题 一、单选题 1．已知全集U =R ，集合{|01},{1,0,1}A x R x B =∈<=-，则( )U A B =（ ） A ．{}1- B ．{1} C ．{1,0}- D ．{0,1} 【答案】C 【解析】根据补集的运算，求得{|0U x A x =≤或1}x >，再结合交集的运算，即可求 解. 【详解】 由题意，全集U =R ，集合{|01}A x R x =∈<≤， 可得 {|0U x A x =≤或1}x >， 又由集合{1,0,1}B =-，所以( ){1,0}U A B ?=-. 故选：C. 【点睛】 本题考查集合的补集与交集概念及运算，其中解答中熟记集合的交集、补集的概念和运算方法是解答的关键，着重考查了运算与求解能力. 2．若复数2i z =-，i 为虚数单位，则(1)(1)z z +-= A ．24i + B ．24i -+ C ．24i -- D ．4- 【答案】B 【解析】()()11z z +-=2 2 11(2)1(34)24z i i i -=--=--=-+ ,选B. , 3．已知实数.a b ，则“2ab ≥”是“224a b +≥”的 A ．充分不必要条件 B ．必要不充分条件 C ．充要条件 D ．既不充分也不必要条件 【答案】A 【解析】本题考查充分必要条件的判断、不等式等知识． 充分性：由均值不等式 ；必要性：取 ，显然得不到 2ab ≥．故“2ab ≥”是“224a b +≥”的充分不必要条件，选A ． 4．若函数()()sin 0x f x x ωωω=>的图象的一条对称轴为3 x π =，则ω的 最小值为（ ） A ． 32 B ．2 C ． 52 D ．3 【答案】C 【解析】由对称轴为3x π =可知3f π?? ??? 为最大值或最小值，即可求解. 【详解】 ∵()12sin 2sin 23f x x x x πωωω??? ?==- ? ? ????? ， 且函数()f x 的图象的一条对称轴为3 x π =， ∴当3 x π = 时，()2sin 333f x f ππ πω????==- ? ????? 取最大值或最小值， ∴ ,3 3 2 k k π π π ωπ- = +∈Z ， ∴5 3,2 k k ω= +∈Z ， ∵0>ω， ∴ω的最小值为52 . 故选：C. 【点睛】 本题主要考查了正弦型函数的图象与性质，属于中档题. 5．已知数列}{ n a 为等比数列，n S 是它的前n 项和，若2312a a a ?=，且4a 与72a 的等差中项为5 4 ，则5S =（ ）． A ．35 B ．33 C ．31 D ．29 【答案】C 【解析】试题分析：由题意得，设等比数列的公比为q ，则2 231112a a a q a q a =?=，所 以42a =， 又3 474452224a a a a q +=+=?，解得11,162 q a ==，所以 江西省南昌市第二中学2014-2015学年高一上学期期中考试化学试题 1.“纳米材料”是粒子直径为1~100nm的材料，纳米碳就是其中一种，若将纳米碳均匀地分散到蒸馏水中，所形成的物质（） ①是溶液②是胶体③能产生丁达尔效应④能透过滤纸⑤不能透过滤纸 ⑥静置后会析出黑色沉淀 A.①④⑤ B.②③④ C.②③⑤ D.①③④⑥ 2.在体积相同的两个密闭容器中分别充满NO2、N2O4气体，当这两个容器内温度和气体密度相等时，下列说法正确的是（） A.两种气体的压强相等 B.两种气体N原子为12 C.两种气体的分子数目相等 D.两种气体的氧原子数目相等 3．设阿伏加德常数为N A，则下列说法正确的是（） A.常温常压下，11.2 LCH4中含有的氢原子数为2N A B.2.7 g铝与足量的盐酸反应，失去的电子数为0.3N A C.含有N A个氦原子的氦气在标准状况下的体积约为11.2L D.1 L 0.1 mol/L MgCl2溶液中含Cl-数为0.1N A 4．在25℃时,在一刚性容器内部有一个不漏气且可滑动的活塞将容器分隔成左右两室。 左室充入氮气,右室充入氢气与氧气的混和气体,活塞恰好停留在离左端的1/5处(图1),然后引燃氢、氧混和气体,反应完毕后恢复至原温度,活塞恰好停在中间(图2),如果忽 略水蒸气体积,则反应前氢气与氧气的体积比可能是 5.下列说法正确的是（） A.还原剂失去电子变成还原产物 B.氧化剂被氧化成还原产物 C.氧化剂是得到电子，发生还原反应的物质 D.还原剂是化合价下降得到电子被氧化的物质 6．能用H＋＋OH－＝H2O表示的化学反应是( ) A.氢氧化镁和稀盐酸反应 B.Ba(OH)2溶液滴入稀硫酸中 C.澄清石灰水和稀硝酸反应 D.二氧化碳通入澄清石灰水中 7.下列反应的离子方程式错误的是（） A.碳酸钙和稀盐酸反应： CaCO3＋2H＋===Ca2＋＋CO2↑＋H2O xx学校xx学年xx学期xx试卷 姓名:_____________ 年级:____________ 学号:______________ 题型选择题填空题简答题xx题xx题xx题总分 得分 一、xx题 （每空xx 分，共xx分） 试题1: 中子星是恒星演化过程的一种可能结果，它的密度很大。现有一中子星，观测到它的自转周期为T＝1/30s。向该中子星的最小密度应是多少才能维持该星体的稳定，不致因自转而瓦解。计等时星体可视为均匀球体。（引力常数G＝6.67×10－11m3/kg·s2） 试题2: 如图所示，在盛水的圆柱型容器内竖直地浮着一块圆柱型的木块，木块的体积为V，高为h，其密度为水密度ρ的二分之一，横截面积为容器横截面积的二分之一，在水面静止时，水高为2h，现用力缓慢地将木块压到容器底部，若水不会从容器中溢出，求压力所做的功。 试题3: 光滑水平面上放有如图所示的用绝缘材料料成的“┙”型滑板，（平面部分足够长），质量为4m，距滑板的A壁为L1距离的B处放有一质量为m，电量为+q的大小不计的小物体，物体与板面的摩擦不计，整个装置处于场强为E的匀强电场中，初始时刻，滑板与物体都静止，试求： （1）释放小物体，第一次与滑板A壁碰前物体的速度v1多大？ （2）若物体与A壁碰后相对水平面的速度大小为碰前的3/5，则物体在第二次跟A壁碰撞之前瞬时，滑板的速度v和物体的速度v2分别为多大？（均指对地速度） （3）物体从开始运动到第二次碰撞前，电场力做功为多大？（碰撞时间可忽略） 评卷人得分 试题4: 为了证实玻尔关于原子存在分立能态的假设，历史上曾经有过著名的夫兰克—赫兹实验，其实验装置的原理示意图如图所示.由电子枪A射出的电子，射进一个容器B中，其中有氦气.电子在O点与氦原子发生碰撞后，进入速度选择器C，然后进入检测装置D.速度选择器C由两个同心的圆弧形电极P1和P2组成，当两极间加以电压U时，只允许具有确定能量的电子通过，并进入检测装置D.由检测装置测出电子产生的电流I，改变电压U，同时测出I的数值，即可确定碰撞后进入速度选择器的电子的能量分布. 我们合理简化问题，设电子与原子碰撞前原子是静止的，原子质量比电子质量大很多，碰撞后，原子虽然稍微被碰动，但忽略这一能量损失，设原子未动（即忽略电子与原子碰撞过程中，原子得到的机械能）.实验表明，在一定条件下，有些电子与原子碰撞后没有动能损失,电子只改变运动方向.有些电子与原子碰撞时要损失动能，所损失的动能被原子吸收，使原子自身体系能量增大， (1)设速度选择器两极间的电压为U（V）时，允许通过的电子的动能为E k（eV），导出E k（eV）与U（V）的函数关系（设通过选择器的电子的轨道半径r=20.0 cm，电极P1和P2之间隔d=1.00 cm,两极间场强大小处处相同），要说明为什么有些电子不能进入到接收器. (2)当电子枪射出的电子动能E k=50.0 eV时，改变电压U（V），测出电流I（A），得出下图所示的I—U图线，图线表明，当电压U为5.00 V、2.88 V、2.72 V、2.64 V时，电流出现峰值，定性分析论述I—U图线的物理意义. (3)根据上述实验结果求出氦原子三个激发态的能级E n（eV），设其基态E1=0. 试题5: 曾经流行过一种向自行车车头灯供电的小型交流发电机，图1为其结构示意图。图中N、S是一对固定的磁极，abcd为固定在转轴上的矩形线框，转轴过bc边中点、与ab边平行，它的一端有一半径r0＝1.0cm的摩擦小轮，小轮与自行车车轮的边缘相接触，如图2所示。当车轮转动时，因摩擦而带动小轮转动，从而使线框在磁极间转动。设线框由N＝800匝导线圈组成，每匝线圈的面积S＝20cm2，磁极间的磁场可视作匀强磁场，磁感强度B＝0.010T，自行车车轮的半径R1＝35cm，小齿轮的半径R2＝4.cm，大齿轮的半径R3＝10.0cm（见图 2）。现从静止开始使大齿轮加速转动，问大齿轮的角速度为多大才能使发电机输出电压的有效值U＝3.2V？（假定摩擦小轮与自行车轮之间无相对滑动） 高考物理模拟试卷 题号一二三四总分 得分 一、单选题（本大题共5小题，共30.0分） 1.电子是我们高中物理中常见的一种微观粒子，下列有关电子说法正确的是（ ） A. 汤姆孙研究阴极射线时发现了电子，并准确测出了电子的电荷量 B. 光电效应实验中，逸出的光电子来源于金属中自由电子 C. 卢瑟福的原子核式结构模型认为核外电子的轨道半径是量子化的 D. 元素发生α衰变时，能够产生电子，并伴随着γ射线产生 2.电风扇的挡位变换器电路如图所示，把它视为一个可调压的理 想变压器，总匝数为2400匝的原线圈输入电压u=220 sin100πt（V），挡位1、2、3、4对应的线圈匝数分别为240匝、600 匝、1200匝、2400匝。电动机M的内阻r=8Ω，额定电压为U=220V ，额定功率P=110W．下列判断正确的是（ ） A. 该交变电源的频率为100Hz B. 当选择3挡位后，电动机两端电压的最大值为110V C. 当挡位由3变为2后，原线圈的电流变大 D. 当选择挡位4后，电动机的输出功率为108W 3.南方气温偏低，经常存在冰冻现象。某校方同学和阳同学（ 校服材质一样）先后从倾斜坡面的同一位置由静止滑下，最 终两人停在水平冰面上，如图所示（两人均可视为质点，且不 计人经过B点时的能量损失）。根据上述信息，不能确定方、阳两人（ ） A. 经过B点时速度大小相等 B. 最终两人停在水平冰面上同一位置 C. 损失的机械能相等 D. 运动的时间相等 4.2019年4月10日晚9时许，全球多地天文学家同步公布如图 所示的首张黑洞照片，黑洞是一种密度极大的天体，从黑洞发 出的光子都无法挣脱引力而射出。若某“黑洞”的半径约为 135km，逃逸速度可近似认为是真空中的光速。已知万有引力 常量G=6.67×10-11N?m2/kg2，真空中光速c=3×108m/s，地球的质 理论分析表明，天体的第二宇宙速度（逃逸 量大约为6.0×1024kg， 速度）是其第一宇宙速度的倍，这个关系对于天体普遍适用。根据以上数据，估算此“黑洞”质量约为地球质量的多少倍（ ） A. 1.5×104 B. 1.5×105 C. 1.5×106 D. 1.5×107 5.如图，竖直平面内存在半径为R的圆形匀强磁场区域 ，以圆心O为坐标原点建立图示直角坐标系，现有， ，三种粒子，以速度v0从a点与x轴正方向 成30°斜向下射入磁场，以速度从b点沿y轴负 绝密★启用前 江西省南昌市第二中学 2020届高三毕业班下学期高考模拟检测(三) 理综-物理试题 14.如图所示，涉及物理学史上的四个重大发现，其中说法正确的是 A.库仑利用图甲实验精确测出了元电荷e 的值 B.法拉第利用图乙实验，发现了电流周围存在磁场 C.伽利略根据图丙理想斜面实验，提出了力不是维持物体运动的原因 D.牛顿利用图丁实验，总结出：自由落体运动是匀变速直线运动 15.如图所示的电路由一小型发电机供电，该发电机内的矩形线圈面积为S=0.2m2、匝数为N=100 匝、电阻为r=2.5Ω，线圈所处的空间是磁感应强度为 B= 2 2πT的匀强磁场,线圈每秒钟绕垂直于磁场的轴匀 速转动10圈。已知与变压器原、副线圈相连的定值 电阻阻值分别为R1=5Ω,R2=20Ω,变压器为理想变压 器,两电表均为理想电表,R1和R2消耗的功率相等。则 A.通过原线圈的电流方向每秒钟改变10次 B.原、副线圈的匝数之比为2:1 C.电压表的示数为160V D.发电机输出的总功率为2560W 16. 2019年中国女排成功卫冕世界杯.如图所示,某次训练中,一运动员将排球从A点水平击出, 球击中D点；另一运动员将该排球从位于A点正下方且与D等高的B点斜向上击出,最高点为C,球也击中D点,A、C高度相同．不计空气阻力．下列说法 正确的有 A.两过程中,排球的初速度大小可能相等 B.两过程中,排球的飞行时间相等 C.后一个过程中,击中D点时重力做功的瞬时功率较大 D.后一个过程中,排球击中D 点时的速度较大 17.如图所示,在y >0的区域内存在方向垂直于纸面向里的匀强磁场 B 1在y <0的区域内存在方向垂 直于纸面向外的匀强磁场B 2,磁场B 2的磁感应强度大小是磁场 B 1的2倍,一带负电的粒子(重力不计)从y 轴上P (0,h )点以某一速 度沿x 轴正方向射入磁场B 1,若第一次经过x 轴时的横坐标为 3h ,则粒子第三次经过x 轴时的横坐标为 A. 33h B 732 h C. 43h D. 93h 18.宇航员飞到一个被稠密气体包围的某恒星上进行科学探索。他站在该恒星表面,从静止释放 一个质量为m 的物体,由于气体阻力,其加速度a 随下落位移x 变化的关系图象如图所示。 已知该星球半径为R ,万有引力常量为G 。下列说法正确的是 A.该恒星的平均密度为G R a 430 B.该恒星的第一宇宙速度为R a 0 C.卫星在距该恒星表面高h 处的圆轨道上运行的周期为03)(4a h R R +π D.从释放到速度刚达最大的过程中,物体克服阻力做功2 00x ma 19.如图所示是氢原子的能级示意图,一群处于 n=3 能级的氢原子在自发跃迁时会辐射一些光子, 用这些光子照射逸出功 2.25eV 的钾,普朗克常量 h=6.63×10-34J·s 。 则以下说法正确的是 A.波长为 60nm 的伦琴射线能使处于基态的氢原子电离 B.金属钾表面所发出的光电子的最大初动能为 9.84eV C.这群氢原子能发出三种不同频率的光 D.氢原子辐射光子后其核外电子动能变小 20.如图甲所示,绝缘水平面上存在方向水平向右的匀强电场,一带电物块以一定的初速度从O 点开始向右运动。取O 点为电势零点,该物块的 电势能与动能之和E 总、电势能E P 随它离开O 2019届湘赣?十四校高三联考第一次考试 英语试卷 长郡中学；衡阳八中；永州市四中；岳阳县一中；湘潭县一中；湘西州民中；九江市一中 石门ー中；县ー中；益阳市ー中；桃源县一中；株洲市二中；麓山国际：江西南昌二中 总分：150分时量：120分钟 考试时间：2019年3月8日8：00～10：00 注意事项 1．答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。 2．回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上，写在本试卷上无效。 第一部分听力（共两节，满分30分） 做题时，先将答案标在试卷上。录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。第一节（共5小題；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。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。 例题:How much is the shirt? 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