南昌二中2015届高三上学期第一次考试英语试题
第Ⅰ卷（三部分，共100分）
第一部分：听力（共两节，满分30分）
第一节（共5 小题；满分7.5 分，每段对话仅读一遍）
1. How many words do Eskimos have for ice probably?
A. Less than 33.
B. Exactly 33.
C. More than 33.
2. Who is the woman?
A. The man’s customer.
B. The man’s s ecretary.
C. The man’s boss.
3. Where are the speakers?
A. In a lab.
B. In a classroom.
C. In an office.
4. When did the man go to Yellowstone National Park?
A. This year.
B. Last year.
C. Three years ago.
5. What does the woman mean?
A. She is busy at the moment.
B. She didn’t go out with Peter last night.
C. She wants the man to hold on for a minute.
第二节（共15 小题；满分22.5 分，每段对话或独白读两遍）
听第6 段材料，回答第6、7题。
6. Where does the conversation take place?
A. At a bus stop.
B. In a newspaper office.
C. In a coffee shop.
7. What are the speakers mainly talking about?
A. A letter.
B. Public transportation.
C. Road construction.
听第7段材料，回答第8、9题。
8. Why did the police officer stop the woman?
A. She broke a traffic rule.
B. Her appearance matched that of a criminal(罪犯).
C. He was looking for someone driving a similar car.
9. What do we know about the thief?
A. He has dark hair.
B. He has blond hair.
C. He is five feet tall.
听第8段材料，回答第10至12题。
10. Who is the woman?
A. A saleswoman.
B. A shoe repairer.
C. A shoe maker.
11. When can the man pick up his shoes?
A. AT 5:00 this afternoon
B. At 2:00 tomorrow afternoon.
C. At 4:30 tomorrow afternoon.
12. What is the man satisfied with?
A. The price.
B. The quick service.
C. The quality.
听第9段材料，回答第13至16题。
13. How long has Michael Wilson been cooking?
A. For the last twenty years.
B. Since he was twenty years old.
C. Since he was a kid.
14. What does Michael Wilson say about making friends?
A. Having something in common helps a lot.
B. Eating together is a great way to get to know others.
C. Language is necessary for making friends.
15. According to Michael Wilson, where would be a good place to eat beef?
A. New York City.
B. Finland.
C. Shanghai.
16. What does Michael Wilson probably use in his dishes?
A. Complicated sauces(调味酱).
B. Expensive spices(香料) from around the world.
C. Local fruits and vegetables.
听第10段材料，回答第17至20题。
17. How tall is the second tallest building in the world?
A. Almost 2800 feet tall.
B. Almost 1800 feet tall.
C. Almost 1000 feet tall.
18. What’s one of the funny things about the Burj Khalifa?
A. Its location.
B. Its shape.
C. Its building materials.
19. What does the speaker say would take all morning?
A. Washing all the windows of the Burj Khalifa.
B. Climbing the stairs to the of the Burj Khalifa.
C. Taking the elevator(电梯) to the top of the Burj Khalifa.
20. What can we learn about the Burj Khalifa?
A. It is surrounded by other tall buildings.
B. It was designed by an American firm.
C. It was based on a famous picture of ants.
第二部分：完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，掌握其大意。然后从21--40各题所给的四个选项中，选出最佳选项
I wished I had known earlier the fact that I was a low achiever because there was a reason beyond my control. Then I 21 have worked so hard in my late twenties and early thirties. But I just didn’t 22 that. I was writing and writing. I was working for no other reason than to hear people praise me.
Most people who 23 university read at least twice as fast as I do. I can never tell my left 24 my right. I avoid dialing a telephone if I can help it, because I sometimes have to try three times before getting the number 25 . I hear that recording “The number you have reached is not 26 ” more than any man on earth.
Despite my 27 I view my dyslexia(difficulty in reading) as a gift, not a curse(诅咒). Many dyslexics are good at right brain, namely abstract thought ,and that is 28 my king of creative writing is. I’m starting with 29 and coming up with something that didn’t exist before. That’s my strong point. I 30 my career to Ralph, Salisbury, my writing instructor at the university of Oregon, who looked past my misspellings and gave me 31 and hope. I just carried on and never looked 32 . I’m also very“visual”(视觉的).This means nothing in school, but when I write books or scripts, I’m seeing everything in my imagination. I write 33 . I go like the wind and can 34 up to 15 pages a day. Writing is not the 35 . I have no problem downloading; it is inputting 36 things get messed up.
The real 37 I have for dyslexics is not that they have to 38 with messy input, but that they will quit on themselves before they finish school. Parents have to create victories whenever they can, 39 it is music, sports or the arts. You want your dyslexic child to be able to say, “Yeah, reading is40 . But I have these other things I can do.”
第三部分：阅读理解（共20小题，每小题2分，满分40分）
阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项
A
(NEW YORK) A French tourist highly praised for rescuing a two-year-old girl in Manhattan said he
didn’t think twice before diving into the freezing East River.
Tuesday’s Daily News said 29-year who left the spot quickly after the rescue last Saturday. He lifted the little girl out of the water after she fell off the bank at the South Street Scaport museum. He handed the girl to her father, David Anderson, who had dive in after him.
“I didn’t think at all,” Duret told the Daily News. “It happened very fast. I reacted very fast.”
Duret, an engineer on vacation ,was walking with his girlfriend along the pier(码头)when he saw something falling into the water .He thought it was a doll, but realized it was a child when he approached the river. In an instant, he took off his coat and jumped into the water.
When he reached the girl, she appeared lifeless, he said. Fortunately, when she was out of the water, she opened her eyes.
Anderson said his daughter slipped off the bank when he was adjusting his camera. An ambulance came later for her, said Duret, who was handed dry clothes from cookers. Duret caught a train with his girlfriend shortly after.
The rescue happened on the day before he left for France. Duret said he didn’t realize his tale of heroism he was leaving the next morning.
“I don’t really think I’m a hero,” said Duret. “Anyone would do the same t h ing.”
B
With their weakening bodies, advanced age or increasing pressure of work or study, people have been advised and usually persuaded to have health care products. Do you remember your first time to take a nutritional supplement(营养补充品)? What was your first impression?
Posted by Amy, Dec.23, 2010 8∶05 P．M.
Madeline on Dec.24, 2010 7∶25 P．M.
Years ago, as a young mom with two small children, I struggled to keep up with the demands of a busy life. One day, I woke up feeling so tired that I knew something had to change! A friend gave me some Royal Jelly—an amazing substance(物质)from the beehive(蜂房).I was doubtful, but desperate...so I tried it! In time, I began to experience renewed energy like never before! Now, over two decades later, I travel all round the country, sharing my life-changing experience. I’m grateful for the energy to keep up and love to share this wonderful discovery with others. Blanca on Dec.25, 2010 7∶02 P．M.
Ten years ago, when I was 73, my mind wanted to be busy and useful, but my body didn’t. I became very tired. That’s when my daughter Madeline tried to persuade me to try her special Royal Jelly. It made great difference in her life, so she was sure it could help me too! Hesitating for 2 days, I gave in. She was right! I no longer felt worn out. I had a new, youthful eagerness for life and I’ve been OK—thanks to Royal Jelly!
Lori on Dec.25, 2010 10∶27 P．M.
When my mom Madeline was introduced to Royal Jelly, it affected my life, too! Mom gave me some of her fantastic Royal Jelly. Boy, things did turn around! I had more energy and vitality and was finally able to keep up with high school and, eventually, college activities. Today, I’m a b usy
mom in my mid thirties with two active boys and a new business! I have enough energy to do it all! I’m glad I took my Mom’s advice.
45. From the text, we learn that ____________.
A．Madeline was more than willing to take Royal Jelly at the very beginning
B．Royal Jelly is a product that can help renew a person’s energy and vitality
C．Amy has benefited from Royal Jelly so she posted a topic about the product
D．Lori was grateful because Royal Jelly helped him improve his schoolwork
46. Which of the following is TRUE of Blanca?
A. She replied to the topic on Christmas Eve.
B. She tried Royal Jelly without hesitation.
C. She was the second one to reply to the topic.
D. She’s now supposed to be in her seventies.
47. The underlined word “vitality” probably refers to the state of feeling ___.
A. impressive
B. energetic
C. relaxed
D. exhausted
48. What’s the relationship between the Royal Jelly takers?
A．Lori and Blanca are Madeline’s grandchildren.
B．Blanca is Lori and Madeline’s great grandmother.
C．They have no blood relationship but friendship.
D．Madeline is Blanca’s daughter and Lori’s mother.
49. Where can we most probably read this text?
A．In a health club. B．On an Internet page.
C．In a book review. D．In a health report.
C
From good reading we can get pleasure, companionship, experience, and instruction. A good book may absorb our attention so completely that for the time being we forget our surroundings and even our identity. Reading good books is one of the greatest pleasures in life. It increases our contentment when we are cheerful, and lessens our troubles when we are sad. Whatever may be our main purpose in reading, our contact with good books should never fail to give us enjoyment and satisfaction.
With a good book in our hands we need never be lonely. Whether the characters in it are taken from real life or are purely imaginary, they may become our companions and friends. In the pages of books we can walk with the wise and the good of all lands and all times. The people we meet in books may delight us either because they resemble (相像) human friends whom we hold dear or because they present unfamiliar types whom we are glad to welcome as new acquaintances(熟人). Our human friends sometimes may bore us, but the friends we make in books need never weary us with their company. By turning the page we can dismiss them without any fear of hurting their feelings. While human friends desert us, good books are always ready to give us friendship, sympathy, and encouragement.
Of all the gifts from reading books, the most valuable one is experience. Few of us can travel far from home or have a wide range of experiences, but all of us can lead varied lives through the pages of books. Whether we wish to escape from the seemingly dull realities of daily routines or whether we long to visit some far-off place, a book will help us when nothing else can. To travel by book we need no bank account to pay our way; no airship or ocean liner or stream-lined train to transport us; no passport to enter the land of our heart's desire. Through books we may get the thrill of hazardous adventure without danger. We can climb high mountains, brave the perils (危险) of an Antarctic winter, or cross the scorching sands of the desert, all without hardship. In books we may visit the studios of Hollywood; we may mix with the merry crowds of the Paris boulevards; we may join the picturesque peasants in an Alpine village or the kindly natives on a South Sea island. Indeed, through books the whole world is ours for the asking. The
possibilities of our literary experiences are almost unlimited. The beauties of nature, the enjoyment of music, the treasures of art, the triumphs of architecture, the marvels of engineering, are all open to the wonder and enjoyment of those who read.
50. Why do we sometimes forget our surroundings and even our identity while reading?
A. No one is trying to disturb you there.
B. All is so quiet and calm around you.
C. The book you read is so fascinating.
D. Our life is just far from satisfactory.
51. What makes people like their acquaintances in books even more?
A. They are just like our human friends.
B. They are unfamiliar types we like.
C. They will never ever abandon us.
D. They will never hurt our feelings.
52. The word “hazardous” means ______.
A. “unexpected”
B. “dangerous”
C. “imaginary”
D. “unusual”
53. “... the whole world is ours for the asking” me ans that we can____________.
A. experience the whole world just by reading
B. get anywhere in the world only by asking
C. make a trip around the world free of charge
D. actually possess everything in this world
54. What is the most suitable title for this passage?
A. Reading and traveling
B. Experiencing the world
C. Traveling with books
D. Gifts from reading
D
There is no denying that for more than a generation college education has been accepted without the slightest doubt. All high school graduates ought to go, says conventional wisdom and statistical evidence, because college will help them earn more money, become “better” people, and learn to be more responsi ble citizens than those who don’t go.
But college has never been able to work its magic for everyone. And now that close to half our high school graduates are attending, those who don’t fit the pattern are becoming more numerous, and more obvious. College graduates are selling shoes and driving taxis; college students interfere with each other’s experiments and write false letters of recommendation in the fierce competition so as to get admitted into graduate schools. Others find no stimulation (激励) in their studies, and consequently have to drop out, which is often encouraged by college administrators.
Some observers say the fault is with the young people themselves--they are spoiled and they are expecting too much. But that’s a condemnation（谴责）of the students as a whole, and doesn’t explain all campus unhappiness. Others blame the state of the world, and they are partly right. We have been told that young people have to go to college because our economy can’t absorb an army of untrained eighteen-year-olds. But disappointed graduates are learning that it can no longer absorb an army of trained twenty-two-year-olds, either.
Some campus watchers have openly begun to suggest that college may not be the best, the proper, the only place for every young person after the completion of high school. We may have been looking at all those surveys and statistics upside down, it seems, and through the rosy(玫瑰般的) glow of our own remembered college experiences. Perhaps college doesn’t make people intelligent,ambitious, happy,liberal, or quick to learn things—maybe it is just the other way around, and intelligent, ambitious, happy, liberal, quick-learning people are merely the ones who have been attracted to college in the first place. And perhaps all those successful college graduates would have been successful whether they had gone to college or not. This is heresy (异端邪说) to those of us who have been brought up to believe that if a little schooling is good, more has to be much better. But contrary evidence is beginning to come up.
55. According to the first paragraph, ___________________.
A. people now no longer challenge college education.
B. people still have a low opinion of college education.
C. the author thinks youngsters should all go to college.
D. people have great expectations for college education.
56. More young people drop out of college because _________.
A. they are no longer motivated in their studies.
B. they can start selling shoes and driving taxis.
C. they compete for admission to graduate schools.
D. college administrators encourage them to do so.
57. Who does the author think is to blame for campus unhappiness?
A. young students who are all spoiled and expecting too much.
B. our society that can’t offer enough jobs to college graduates.
C. our society that has not enough jobs for high school graduates.
D. young people as well as our society are to blame for all this.
第四部分语法和词汇知识（共5小题,满分5分）
61. Such plants, particularly___ to collectors, motivated them to explore on a large scale.
A. appealed
B. attracted
C. appealing
D. attaching
62.These citizenship ceremonies on Australian Day are intended to encourage ____, respect and
promote friendship among people of different cultural and social backgrounds.
A. reservation
B. endurance
C. tolerance
D. expedition
63. There were restrictions _____ the weight of luggage. As a result we decided to travel _____.
A. on, light
B. in, light
C. to, lightly
D. with, lightly
64. He has a great interest in tennis and ______ it twice a week over the past year.
A. plays
B. played
C. had played
D. has been playing
65. It was ___ he won third place ___ he realized body was merely an instrument of the spirit.
A. since ,when
B. not until, that
C. only when, before
D. not until, when
第Ⅱ卷(共50分)
第一节阅读表达(共5小题；满分10分)
Statuses(身份) are part of human inventions that help us get along with one another and determi ne where we “fit” in society. As we go about our daily routines, we mentally attempt to place people in terms of their statuses. For example, we must judge whether the person in the library is a reader or a librarian, whether the telephone caller is a friend or a salesman, and so on.
The statuses we take often vary with the people we meet and change throughout life. Most of us can quickly adjust our statuses that various situations or occasions require. Most of social interaction(互动) consists of identifying and selecting among appropriate statuses and allowing other people to take their statuses in relation to us. This means that we fit our actions to those of other people based on a constant mental process of judgment. Although some of us find the task more difficult than others, most of us perform it rather effortlessly.
A status has been compared to ready-made clothes. Within certain limits, the buyer can
choose style and fabric (衣料). But an American is not free to choose the costume of a Chinese peasant or that of a Hindu prince. We must choose from among the clothing presented by our society. Furthermore, our choice is limited to a size that will fit, as well as by our pocketbook(钱包). Having made a choice within these limits we can make certain changes, but apart from minor adjustments, we tend to be limited to what the stores have on their racks(衣架). Statues too come ready made, and the range of choice among them is limited.
66. What is the function of statuses ? (not more than 15 words)
___________________________________________________.
67. What do we do as the situation changes? (not more than 5 words) ________________.
68. In Paragraph 2 which word do you think can replace“identifying”? (1 word) _____
69.Besides society what are the other two factors (因素)that limit our choice of statuses?
_____________________________ (not more than 3 words)
70. What is the main idea of Paragraph 3? (not more than 7 words)
___________________________________________
第二节语法填空(满分10分,每空不超过3个单词)
“Equal pay for equal work” is a phrase by the American women who feel they are __71_(fair) treated by society. They think it is not right for women to be paid less than men for the __72__ amount of work. Some people say men have more duties than women. A married man has to earn money to support his family and make important __73__ (decide), so it is right for them to be paid more. Some are even against married women _74__(work)at all. When wives go out to work, they say, the home and children are given no attention __75_. If women are encouraged by equal pay to take up jobs, they will __76__(able) to do the things that they are best at doing: making a nice home and bringing __77__ children. Women who disagree say that they want to escape from the limited place which society wishes them to fill and have __78_ freedom to choose between a job and home life, __79_ a mixture of the two. In fact women have the right __80__ to equal pay but also to equal chances.
第三节书面表达(满分25分，注意含卷面5分)
假设你是二中高三（8）中学的学生王军，班里从外地转来一名同学李华，他一时无法融入新的班集体，感到很苦恼。请根据下列要点用英语给他写封信：
☆帮他分析原因☆给他提出建议☆陈述你帮助他的具体打算
注意：词数130左右
Dear Li Hua,
I’m very glad to become your classmate. I know you are worried about your study and don’t know how to adapt yourself to the new environment. _________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________ Best regards,
Yours,
Wang Jun
南昌二中2014-2015学年度上学期第一次考试
高三英卷参考答案
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 2019年普通高等学校招生全国统一考试（全国卷I） 英语 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和试卷指定位置上。 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。 3．考试结束后，将本试卷和答题卡一并交回。 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。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. Where does this conversation take place? A. In a classroom. B. In a hospital. C. In a museum. 2. What does Jack want to do? A. Take fitness classes. B. Buy a pair of gym shoes. C. Change his work schedule. 3. What are the speakers talking about? A. What to drink. B. Where to meet. C. When to leave. 4. What is the relationship between the speakers? A. Colleagues. B. Classmates. C. Strangers. 5. Why is Emily mentioned in the conversation? A. She might want a ticket. B. She is looking for the man. C. She has an extra ticket. 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 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. 湖北省武汉二中2009届高三3月测试题 英语 第一部分听力（略） 第二部分英语知识运用（共二节，满分40分） 第一节：多项选择（共10小题，每小题1分，共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。 21. Once you acquire the of always doing a little more than expected, your workmates will trust you with greater responsibilities. A. personality B. reputation C. character D. achievement 22. The programmes on New Year’s Eve have to to many different types of interest and taste among the public. A. satisfy B. cater C. apply D. attract 23. It is difficult for a teacher to give attention to children in a large class. We should reform the situation in order to meet each child’s needs. A. private B. personal C. individual D. single 24. It is rather that we still do not know how many species there are in the world today. A. misleading B. embarrassing C. boring D. demanding 25. It me that the murderer has escaped from prison. A. occurs B. indicates C. astonishes D. publishes 26. On her first day at school, the young teacher was deeply by the naughty boys. A. defended B. offered C. offended D. frightened 27. In this warm weather the ice will soon . A. spoil B. melt C. dissolve D. fail 28. She wants to find a job in the kindergarten because she working with children. A. adores B. admires C. dreams D. avoids 29. He was charged with a shotgun without a licence. A. possessing B. launching C. locating D. prohibiting 30. The young actress is very about her success; she says it’s as much the result of good luck as of her own abilities. A. crazy B. modest C. particular D. confident 第二节完形填空(共20小题，每小题 1.5分，满分30分) 阅读下面短文，掌握其大意，然后从31—50 各题后给的A，B，C，D四个选项中，选 出最佳选项，并在答题卡上将该项涂黑。 It was a bright spring afternoon when Freda told me she wouldn’t need me any more. I had just finished my four-hour work－31 up and down the stairs of her three-storey home cleaning the floor and washing the dishes. She was 32 jeans and a sweater, sitting at the 34 was going table I had just 33 , a pile of papers spread around her. Her husband’s to be reduced by thirty percent, and they were trying to live as if it had 35 happened. I felt sorry for her, but I also felt a sense of 36 . 37 an unexpected relationship I had been cleaning Freda’s house for five years and had with the family. It was not just 38 I had become an expert at scraping (刮掉) dirt stuck to their wooden floor, 39 that I had learned exactly how to place toys on the girls’ beds. It wa 【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. 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. 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） 姓名： ____________考号： __________班级： _________得分： 高考英语周考英语答题卡 1[ A ][ B ] 2[ A ][ B ] 3[ A ][ B ] 4[ A ][ B ] 5[ A ][ B ] 26[ A ][ B ] 27[ A ][ B ] 28[ A ][ B ] 29[ A ][ B ] 30[ A ][ B ] 41[ A ][ B ] 42[ A ][ B ] 43[ A ][ B ] 44[ A ][ B ] 45[ A ][ B ] [ C ] 6 [A][ B ][ C ]11[ A ][ B ][ C ]16[ A ][ B ][ C ]21[ A ][ B ][ C ][ D ] [ C ]7 [A][ B ][ C ]12[ A ][ B ][ C ]17[ A ][ B ][ C ]22[ A ][ B ][ C ][ D ] [ C ]8 [A][ B ][ C ]13[ A ][ B ][ C ]18[ A ][ B ][ C ]23[ A ][ B ][ C ][ D ] [ C ]9 [A][ B ][ C ]14[ A ][ B ][ C ]19[ A ][ B ][ C ]24[ A ][ B ][ C ][ D ] [ C ]10 [A][ B ][ C ]15[ A ][ B ][ C ]20[ A ][ B ][ C ]25[ A ][ B ][ C ][ D ] [ C ][ D ]31[ A ][ B ][ C ][ D ]36[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]32[ A ][ B ][ C ][ D ]37[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]33[ A ][ B ][ C ][ D ]38[ A ][ B ][ C ][ D ][ E ][ F ][ G] [ C ][ D ]34[ A ][ B ][ C ][ D ]39[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]35[ A ][ B ][ C ][ D ]40[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]46[ A ][ B ][ C ][ D ]51[ A ][ B ][ C ][ D ]56[ A ][ B ][ C ][ D ] [ C ][ D ]47[ A ][ B ][ C ][ D ]52[ A ][ B ][ C ][ D ]57[ A ][ B ][ C ][ D ] [ C ][ D ]48[ A ][ B ][ C ][ D ]53[ A ][ B ][ C ][ D ]58[ A ][ B ][ C ][ D ] [ C ][ D ]49[ A ][ B ][ C ][ D ]54[ A ][ B ][ C ][ D ]59[ A ][ B ][ C ][ D ] [ C ][ D ]50[ A ][ B ][ C ][ D ]55[ A ][ B ][ C ][ D ]60[ A ][ B ][ C ][ D ] 第二节：语法填空（15 分） 61.____________ 62. _____________ 63. ______________ 64. ________________ 65. ____________ 66._____________ 67. _____________68. _______________69. ________________ 70. ___________ 第一节：短文改错（10 分） As we all know, life is very much beautiful and precious; therefore we should admire but value it. We should make our life richly and meaningful by working hard. Only in that way can we carry out our duties in life. Furthermore, we should be braver enough to meet the challenges and manage to overcome the difficulties and sadness we meet in your life. By doing so, we can make greater progress in our field and enjoy our success and pleasure earning by ourselves. All in all, not only should we learn to enjoy the beauty of life now, but also we should learn how protect and fight against a more beautiful life in the future. 第 1页（共 2 页） 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完整word版,2019年全国I卷英语高考真题
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