题目
题型：不详难度：来源：
For many years, scientists couldn"t figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What"s more, living things have energy and can reproduce, while the chemicals on the Earth 4 billion years ago were lifeless.
After years of study, scientists figured out that living things, including human bodies, are basically made of amino acids and nucleotide bases. These are molecules with millions of hydrogen, carbon, nitrogen, and oxygen atoms. How could such complicated molecules have been formed in the primitive soup? Scientists were stumped.
Then, in 1953, two scientists named Harold Urey and Stanley L. Miller did a very simple experiment to find out what had happened on the Primitive Earth. They set up some tubes and bottles in a closed loop, and put in some of the same gases that were present in the atmosphere 4 billion years ago: water vapor, ammonia, carbon dioxide, methane, and hydrogen.
Then they shot an electric spark through the gases to simulate bolts of lightning on the ancient Earth, circulated the gases through some water, sent them back for more sparks, and so on. After seven days, the water that the gases had been bubbling through had turned brown. Some new chemicals were dissolved in it. When Miller and Urey analyzed the liquid, they found that it contained amino acids-the very kind of molecules found in all living things.
61. When did scientists come to realize how the atoms and molecules on the Earth combined to make living thing?
A. 4 billion years ago. B.1953. C. After seven days.D. Many years later.
62. Scientists figured out that human bodies are basically made of .
A.amino acids
B.molecules
C. hydrogen, carbon, nitrogen and oxygen atoms
D. water vapor, ammonia, carbon dioxide, methane and hydrogen
63. Harold Urey and Stanley L.Miller did their experiment in order to .
A. find out what had happened on the Earth 4 billion years ago
B.simulate bolts of lightning on the ancient Earth
C. dissolve some new chemicals
D.analyze a liquid
64. At the end of the last paragraph, the underlined word "it" refers to .
A. a closed loop B. an electric spark C.water D. the liquid
65. According to the writer, living things on the Earth include .
A. atoms and molecules B.chemicals
C. plants, fish, dinosaurs and human beings D.the primitive soup
答案
61---65 BBADC
解析
核心考点
试题【For many years, scientists couldn"t figure out how atoms and molecules on the Ea】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
No one took any notice of me before school. I stood in the center of the playground, expecting someone to say “hello”, but no one spoke to me. When a teacher called my name and told me where my classroom was, one or two boys looked at me but that was all the curiosity my arrival aroused.
My teacher was called Mr Jones. There were 42 boys in the class, so I didn’t stand out there, either, until the first lesson of the afternoon. Mr Jones was very fond of Charles Dickens and he had decided to read aloud to us from David Copperfield, but first he asked several boys if they knew Dickens’ birthplace, but no one guessed right. A boy called Brian, the biggest in the class, said: “Timbuktu”, and Mr Jones went red in the face. Then he asked me. I said: “Portsmouth”, and everyone stared at me because Mr Jones said I was right. This didn’t make me very popular, of course.
“He thinks he’s clever,” I heard Brian say.
After that, we went out to the playground to play football. I was in Brian’s team, and he obviously had Dickens in mind because he told me to go in goal. No one ever wanted to be the goalkeeper.
“He’s big enough and useless enough,” Brian said when someone asked him why he had chosen me.
I suppose Mr Jones remembered Dickens, too, because when the game was nearly over, Brian pushed one of the players on the other team, and he gave them a penalty. As the boy kicked the ball hard along the ground to my right, I threw myself down instinctively and saved it. All my team crowded round me. My bare knees were grazed and bleeding. Brian took out a handkerchief and offered it to me.
“Do you want to join my gang (team)?” he said.
At the end of the day, I was no longer a stranger.
51．The writer prepared to answer all of the following questions EXCEPT “________”.
A. How old are you? B. where are you from?
C. Do you want to join my gang? D. When did you come back to London?
52．We can learn from the passage that ________.
A. boys were usually unfriendly to new students
B. the writer was not greeted as he expected
C. Brian praised the writer for his cleverness
D. the writer was glad to be a goalkeeper
53．The underlined part “I didn’t stand out” in paragraph 3 means that the writer was not ________.
A. noticeable B. welcome C. important D. outstanding
54．The writer was offered a handkerchief because ________.
A. he threw himself down and saved the goal B. he pushed a player on the other team
C. he was beginning to be accepted D. he was no longer a new comer
But in many other homes, this china-and-silver elegance has given way to a stoneware (粗陶) and stainless informality, with dresses assuming an equally casual-Friday look. For hosts and guests, the change means greater simplicity and comfort. For makers of fine china in Britain, it spells economic hard times.
Last week Royal Doulton, the largest employer in Stoke-on-Trent, announced that it is eliminating 1,000 jobs－one-fifth of its total workforce. That brings to more than 4,000 the number of positions lost in 18 months in the pottery (陶瓷) region. Wedgwood and other pottery factories made cuts earlier.
Although a strong pound and weak markets in Asia play a role in the downsizing, the layoffs in Stoke have their roots in earthshaking social shifts. A spokesman for Royal Doulton admitted that the company “has been somewhat slow in catching up with the trend” toward casual dining. Families eat together less often, he explained, and more people eat alone, either because they are single or they eat in front of television.
Even dinner parties, if they happen at all, have gone casual. In a time of long work hours and demanding family schedules, busy hosts insist, rightly, that it’s better to share a takeout pizza on paper plates in the family room than to wait for the perfect moment or a “real” dinner party. Too often, the perfect moment never comes. Iron a fine-patterned tablecloth? Forget it. Polish the silver? Who has time?
Yet the loss of formality has its down side. The fine points of etiquette (礼节) that children might once have learned at the table by observation or instruction from parents and grandparents (“Chew with your mouth closed.” “Keep your elbows off the table.”) must be picked up elsewhere. Some companies now offer etiquette seminars for employees who may be able professionally but inexperienced socially.
67．Why do people tend to follow the trend to casual dining?
A. Family members need more time to relax.
B. Busy schedules leave people no time for formality.
C. People prefer to live a comfortable life.
D. Young people won’t follow the etiquette of the older generation
68．It can be learned from the passage that Royal Doulton is ________.
A. a seller of stainless steel tableware B. a dealer in stoneware
C. a pottery chain store D. a producer of fine china
69．The main cause of the layoffs in the pottery industry is ________.
A. the increased value of the pound
B. the worsening economy in Asia
C. the change in people’s way of life
D. the fierce competition at home and abroad
70．Formal table manners, though less popular than before in current social life, ________.
A. are still a must on certain occasions B. are certain to return sooner or later
C. are still being taught by parents at home D. can help improve personal relationships
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，并在答题卡上将该项涂黑
It was in New York City to advise large banks on the secret to success in business. Once I started a 36 with my taxi driver, Tony. He had studied be an oceanic biologist, but couldn"t get a 37 job in that field. “I like driving a taxi,” he said. “38 I hope to do much better than just get by.”
Like many people, Tony thought that being self-reliant meant 39 asking for help. But we need to develop relationship in order to 40 our goals.
Tony liked chatting with his customers, yet he didn’t want 41 to them. I advised him to give it a 42 . And he did. Not only did his customers take his taxi more often, but they 43 him to their friends. Soon he had a long list of regulars and 44 buy his own car, then a second. He had to 45 a friend to help with the overflow.
We each contain 46 Of greatness. Life is all about finding that seed and nurturing it to its 47 growth. And I know it’s 48 , because I am living proof.
I’m the son of a steelworker. My dad would come home, his hands 49 and dirty, and say, “I don’t want this for you, Keith. You need a great 50 .”
And bravely, he went to the CEO（总裁）of his company to ask for his advise. The CEO admired his 51 and helped get me a scholarship at one of the best schools in the country. I 52 to Yale University and Harvard Business School. 53 I was the youngest chief marketing officer in the Fortune 500. I learned 54 a young age that the secret to success 55 the power of relationship.
36．A．report B．conversation C．suggestion D．speech
37．A．hard B．correct C．suitable D．dull
38．A．And B．Since C．Because D．Though
39．A．never B．always C．ever D．sometimes
40．A．find B．fail C．miss D．achieve
41．A．please B．excite C．bother D．worry
42．A．try B．drive C．talk D．hand
43．A．suggested B．recommended C．mentioned D．told
44．A．was able to B．could C．ought to D．might
45．A．make B．let C．hire D．order
46．A．plants B．seeds C．origins D．members
47．A．empty B．full C．huge D．tiny
48．A．enough B．necessary C．strange D．possible
49．A．scratched B．wounded C．injured D．fixed
50．A．work B．career C．education D．university
51．A．honesty B．feeling C．expression D．courage
52．A．went on B．got off C．set out D．kept up
53．A．So B．Meanwhile C．Soon D．Once
54．A．of B．in C．under D．at
55．A．leads to B．lies in C．relies on D．sticks to
I didn’t understand what he meant until my first party. Whether they were friends or strangers, teenagers or elders, girls or guys, everyone I met gave me a big hug.
However, as time went on, I began to understand America’s hugging culture. When a friend broke up with me, I was sad. When I told my best American friend about it, she said nothing but put her arms around me. Then warmth of the hug was a greater comfort than anything she could have said to me.
One winter day I was walking along the street, shivering（颤抖）. It was then I saw two women, each holding a paper board, on which there were two words：FREE HUGS. Their were red because of the freezing weather and they were jumping up and down to keep themselves warm. “Hi, girl! Do you want a hug?” One of them asked me. I went up and opened my arms. The hug was short but warm and it took some of the coldness of the day away.
After that I became a big hugger myself. One time my host father and I were traveling to another town. When we reached a restaurant where my friend Cindy worked, he stopped the car.
“What’ wrong?” I asked.” “Alice, why don’t you go inside and give Cindy a hug?” He suggested. I went into the restaurant, ran straight up to Cindy, and gave her a hug before she realized what was going on. “That was a big surprise! And you got my day sweetie! ” She told me later.
A hug is a way to communicate love and care. Do you want a hug? My arms are wide open.
56．The point of the first three paragraphs is to explain .
A．how body language is more important than actual words
B．why hugging is so important in American culture
C．how expressing, feelings can be difficult for Chinese
D．how the author’s attitude toward hugging culture changed
57．We can infer from the passage that the host father .
A．seldom has has time to spend with the author
B．often shares his experience with the author
C．warns the author of the possible danger
D．teachers the author to show her care for her friends
58．According the passage, a hug can make us feel
A．comforted, loved and cared for B．happy, understood and amazed
C．excited, wise and surprised D．cared for, wise and happy
阅读下面短文，掌握其大意，然后从36—55各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
For much of our life, my mother and I hated each other. I spent most of my childhood 36 with her – or trying to avoid her, as well as her bitterness, unhappiness and endless smoking. I learned how to defend myself with 37 designed to hurt her. In turn, she vowed I would have a 38 who would feel the way about me that I felt about her.
Many years later when my husband and I decided to have a child, I was 39 to have a girl. I couldn’t 40 the though of a daughter who might not love me – or who would want to 41 me. As soon as I became pregnant, I was convinced I was having a boy. In the delivery room, on my doctor putting my baby into my arms, I couldn’t wait to tell my mother I had a 42 , while “he” was a girl. At that moment, I couldn’t imagine wanting anyone but her.
43 I couldn’t forget my mother’s teasing vow, even after she died and I saw her in a more 44 light. As my daughter got older, whenever we argued, I worried we were 45 the same awful path that my mother and I had gone down.
Last summer, my daughter 46 18, the same age when my mother threw me out of her apartment for 47 . However, I was with her, planning for her first year at college. When my husband and I dropped her off at her school in New York, I finally 48 to her my biggest fear that we would end up like me and my mother. “That will never happen.” she 49 me, kissing me goodbye. Six weeks later, my husband and I returned to the campus. I 50 myself arguing with my daughter about her messy room, not using the library and her mistake of choosing the room near the bathroom. I couldn’t stop myself. And then 51 came: “You’re just like your mother,” my daughter screamed. “I hate you.” And then she 52 .
I finally heard the words I had always dreaded. But maybe that was because I 53 them. I had always worried the bond I shared with my daughter would 54 . later that evening, we picked my daughter up to a restaurant. We ate 55 . But when we separated, I hugged her. The next morning, she called telling she loved me. There wasn’t anything to be afraid of anymore. There was just a relationship we should work on with each other.
36．A．sharing B．playing C．communicating D．fighting
37．A．actions B．activities C．words D．weapons
38．A．husband B．friend C．child D．daughter
39．A．afraid B．unlucky C．uncertain D．willing
40．A．have B．bear C．hold D．afford
41．A．love B．escape from C．obey D．keep from
42．A．daughter B．son C．baby D．life
43．A．Furthermore B．But C．And D．Or
44．A．bright B．annoying C．understanding D．unfriendly
45．A．on B．in C．at D．along
46．A． became B．grew C．went D．turned
47．A．good B．nothing C．my good D．all
48．A．presented B．told C．admitted D．informed
49．A．promised B．pardoned C．referred D．reflected
50．A．wanted B．asked C．forced D．found
51．A．it B．she C．they D．that
52．A．walked away B．looked away C．gave away D．stormed away
53．A．deserved B．demanded C．equaled D．appreciated
54．A．tear B．break C．crash D．last
55．A．in vain B．in general C．in silence D．in brief
最新试题
- 1如图3-2-6所示，一氢气球被一细绳拉住漂浮在空中，试分析细绳所受弹力及施力物体.图3-2-6
- 2I"m _____ at tennis, but Joy even does _____ in it than me.
- 3有人对秋瑾（《感时》）其一作了如下四点注解，你以为是否对，为什么?忍把光阴付逝波，这般身世奈愁何?楚囚相对无聊极，樽酒悲
- 4 设实数x，y满足方程组，则 .
- 5Tom found out his parents weren’t well, so he went back to _
- 6某校对去年毕业的350名学生的毕业去向进行跟踪调查，并绘制出扇形统计图（如图所示），则该校去年毕业生在家待业人数有
- 7莫言的作品将魔幻现实主义与民间故事相融合、历史与当代社会相融合，用魔幻的手法反映现实，核心是“真实”。这种写作手法反映了
- 8漂白粉具有消毒***菌作用，其有效成分为Ca（ClO）2，工业制漂白粉是用氯气与石灰乳反应，化学方程式表示为：2Cl2+2C
- 9读我国某自然灾害发育分布图，回答下列各题。小题1:该自然灾害最可能是A．干旱B．寒潮C．沙尘暴D．滑坡小题2:关于该自然
- 10—Are there any maps on the wall? —_______ [ ]A. There ar
热门考点
- 1（32分）开展节能减排工作关系经济社会的可持续发展，关系广大人民群众的切身利益。需要从现在做起，从每个人身边的小事做起。
- 2（1）“世袭制”代替“禅让制”开始了“公天下”的历史。错误：_____________改正：_____________（
- 3Hiking by oneself can be fun and good for health. It may als
- 4（13分）读下面两幅区域图，完成下列问题。（1）比较甲、乙两个地形区气候特征差异并说明原因。（4分）（2）分析说明乙地种
- 5冬天青蛙要冬眠（ ）A．生物能适应环境B．青蛙不适应寒冷环境C．生物能影响环境D．生物要休息
- 6寒假期间，同学们纷纷参加课题研究。在学生上交的研究报告中，有的讨论传统饮食，有的讨论传统服饰，有的研究古典诗歌，有的研究
- 7学生们正在教室内上课，为了减小校园外汽车的噪声干扰，下列措施可行的是（ ）A．老师讲课的声音大一些B．在教室周围植树C
- 8【题文】 若集合，且，则集合可能是（ ）A． B． C． D．
- 9甲队有32人，乙队有28人，现在从乙队抽调x人到甲队，使甲队人数是乙队人数的2倍．依题意，列出的方程是(
- 10下图是某同学学习了“细胞分裂与分化”后绘制的过程示意图．请据图分析回答问题：（1）图中A→D代表的是______过程；如