15春考试阅读理解复习题(简化版)
大学英语2阅读理解练习题
According to a Xinhua News Agency report, residents of China’s five largest cities spent
about 643 Yuan (US $80.37) each on sport in 2005, with Beijing topping the survey at about 880
Yuan (US $ 110) per person (The five cities were Beijing, Shanghai, Guangzhou, Wuhan and Chengdu).
1. Which of the following cities is not among the 5 largest cities of China?
B. Tianjin
2. The citizens of which city spent the most money each on sport in 2005?
C. Beijing
3. What are the basic means for people to pursue fitness?
D. fitness classes, private training and sports teams
4. People take exercise not only for their own fitness, but also for___.
C. social responsibilities
5. The elderly care more about their health because____.
D. they don’t want to bring any burden to their children
Wang Yani was born in 1975 in Gongcheng, China. Even when she was a baby, she loved to draw lines everywhere. Seeing this, her father decided to help her. He gave her paint, brushes and paper. She practiced hard and improved very quickly. Soon her lines became flowers, trees and animals. Some of her pictures were shown in an art exhibition in Shanghai at the age of 4.
1. Wang Yani’s pictures were first shown____.
B. in Shanghai
2. She was especially good at drawing ____ before she was eight.
A. monkeys and cats
3. Why did her father take her to zoos and parks?
D. Because he wanted the girl to get ideas for her work.
4. When did Yani have her personal show in Washington D. C.?
D. At the age of 14.
5. Which of the following is true?
A. She had a style of painting with bright colors.
One day in 1965, when I was a library worker at school, a teacher came to me. She had a
student who finished his work before all the others and needed something more difficult for him to
do. “Could you help me in the library?” she asked. I said, “Send him along.”
1. Why did the teacher go to the library to find a job for Bill Gates?
C. Because Bill Gates finished his study quickly and had more free time than the others.
2. What do you know from the passage?
B. Bill Gates did his job without any difficulty.
3. The sentence “He picked up the idea immediately” means that_____.
A. he learned that system quickly
4. What was Bill Gates expected to do in the library?
D. Finding books with wrong cards.
5. How did Bill Gates feel when his family would move to another school area?
C. Worried.
The United States is a large country. From the East Coast to the West Coast it is about 3000
miles wide. The Atlantic Ocean is on the east coast and the Pacific Ocean is on the west coast.
Canada is the country to the north of the United States and Mexico is the country to the south. There are many rivers in the US. The most important ones are the Mississippi River and the
1. It is about 3,000 miles wide____.
A. from the East Coast to the West Coast
2. “The American people are of almost every race in the world,” means_____.
A. the American people include nearly all the races of the world
3. New York is ______.
C. the largest city in the United States
4. How many states in the U.S.?
D. 50
5. The best title for the passage is ____.
B. Knowing the U.S.
How men first learnt to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to express thought and feelings, actions and things, so that they could communicate with each other; and that later they agreed upon certain signs, called letters, which could be combined to present 1. One of the reasons why men invented certain sounds to express thoughts and feelings was that ________.
B. they could communicate with each other
2. What is true about the words?
C. They are simply sounds.
3. Which of the following statements is NOT true?
A. The more we read and learn, the more words mean to us.
4. In expressing their thoughts, great writer are able ____.
A. to have their own style
5. We will make our speech silly if we ______.
C. use words without accuracy
People are so busy these days that many have no time to cook. This is a problem because many families love home cooking! A family meal brings everyone together. In some families, meals are often the only time everyone sees each other at the same time.
1. Why do few people cook now?
A. They have no time.
2. A parent spends an hour making cookies____.
D. often to show her or his love
3. The writer thinks the smell of home cooking _____.
A. makes us happy
4. What’s the main idea of this passage?
A. Family meals are important.
5. Which of the following statements is NOT true according to the passage?
B. It becomes a problem that most families love home cooking.
We are sorry that we had to ask the young man to leave the job. It was not that he was unpopular with the other people in the office. Everyone liked him. Nor was it that he was incapable. He had plenty of abilities. The problem was that so much of his work was
1. From the passage, the young man was asked to leave the job because ____.
C. he was irresponsible（不负责的）
2. In the passage “illegible” refers to_____.
A. difficult or impossible to read
3. We learn from the passage that the author did the following EXCEPT______.
A. misjudging the young man
4. The author felt ____ to tell the young man he had lost the job.
D. uncomfortable
5. ____ will take the young man’s place next week.
B. a person recommended by an employment agency
The market is a concept. If you are growing potatoes for sale you are producing for the market. You might sell some to your neighbor and some to the manager of the local supermarket. In either case, you are producing for the market. Your efforts are being directed by the market. If people stop buying potatoes, you will stop producing them.
1. All of the following acts are producing for the market EXCEPT_____.
C. buying food in the supermarket
2. You are buying from the market when you ____.
D. dine at a restaurant
3. The word “real” in the second sentence of the last paragraph most probably means_____.
D. concrete
4. What message will you probably get when nobody buys your potatoes?
A. The message about what you should not produce.
5. Which of the following would be the best title for the passage?
B. What is the Market
It looks like a mobile phone, but the service is much cheaper. It acts like a mobile phone, but only in your own city. Beyond the city walls, it is useless.
1. Why is Little Smart so popular in China?
B. The service is much cheaper.
2. What is the cost of the service of Little Smart?
A. About 0.1 yuan per minute to use.
3. Why are users not satisfied with Little Smart?
D. The quality of its service is bad.
4. What does the word “handset” in the last paragraph mean?
B. telephone
5. What can we learn from the passage?
C. Scientists are trying to make Little Smart more user-friendly.
Driving a car at high speed along a highway seems to be fun. You need only to follow the bright traffic signs beside the highways and it will take you to where you wish.
But to a London taxi driver, driving is not an easy job. A taxi driver has to have not only
1. To be a London taxi driver is not easy because _____.
D. both B and C
2. The London taxi drivers____.
A. work hard because no one would give them money for doing nothing
3. The author of the passage says that___.
B. the more runs the taxi driver makes, the more he gets
4. London taxi driver_____.
C. pay the fares for the poor children to the sea for a day once every year
5. “Underprivileged Children” in the last paragraph of the passage mean children____.
A. of low income families
One of the favorite foods in the United States is the hamburger, a kind of flat round bread with fine-cut beef in between. The favorite place to buy a hamburger is a fast food restaurant. At fast food restaurants, people order their food, wait a few minutes to get it over the corner, and carry it to their tables themselves. People also take their food out of the restaurant and eat it in
1. Which of the following is NOT true according to the passage?
C. Fast food is usually expensive
2. Fast food restaurants are popular because they____________
B. are fast
3. According to the writer , Americans people____________
C. do not want to spend too much time preparing their food
4. According to the passage, the favorite restaurants in the U.S are_______.
B. the fast food restaurants
5. The best title for the passage would be ____________.
A. Fast Food Restaurants in the U.S.
No one knows who made the first ice cream. Some people think that water ices and milk ices may have been made by the Chinese between three thousand and four thousand years ago. In time, the dish reached India. The Indians, in turn, may have passed on the secret to the Arabs and the Persians. The Persians called their dish Sharbat, from which our word sherbet（冰冻果子露）comes.
1. This passage is mainly about ____.
D. the history of ice cream
2. Marco Polo’s remark shows that he traveled in ____.
A. China
3. Ice cream was unknown in France until _____.
A. 1533
4. Ice cream was introduced to England by ______.
C. King Charles I
5. What will be probably discussed in the paragraphs following this passage?
D. Development of ice cream in America or other countries.
In the eighteenth century young ladies in Italy knew history and geography little.
Once the French officer in Rome was giving a ball to which many important people were invited. The Italian Minister（大臣）came very late. A young lady, who knew him, saw him enter
1. Why was the Minister late?
D. The head left his letters in the hotel.
2. Where did the head leave his letters?
A. In the hotel.
3. Why did the young lady shout?
A. She wanted to tell the surprising news.
4. Her shouting showed she was______.
B. lack of knowledge
5. The best title for the passage is ______.
C. An Ignorant Italian Woman
My aunt Edith was a widow（寡妇）of 50, working as a secretary, when doctors discovered what was then thought to be a very serious heart disease.
Aunt Edith doesn’t accept defeat easily. She began studying medical reports in the library and found an article in a magazine about a well-known heart surgeon, Dr. Michael DeBakey, of Houston, Texas. He had saved the life of someone with the same disease. The article said his fees
1. Aunt Edith_____when she knew she had a very serious heart disease.
B. didn’t lose hope
2. From the story we can see _____.
C. Dr. Michael DeBakey was experienced in dealing with Aunt Edith’s disease
3. In Aunt Edith’s letter to the doctor, ______.
A. she showed she was warm, humorous and enjoying living
4. When Aunt Edith mailed her letter, _____.
D. she didn’t expect the doctor would give her a reply
5. Michael DeBakey mainly told Aunt Edith in the letter that_____.
A. he was going to operate on her for free
A dolphin(海豚)is always well-known as a clever and friendly animal. Recently another amazing discovery made by the British marine(海洋的)biologist Alexis shows that dolphins, to our surprise, keep in touch with each other by calling each other's names among themselves something like human beings.
1. Alexis's new discovery about dolphins is that they are________.
D. able to call each other by name
2. Which is true to the passage?
A. Each dolphin has a special sound signal as his name.
3. _________ is thought to be a step from animals' calls to language.
B. Imitating others' cries
4. In which ways is a dolphin like a human being?
D. Both B and C
5. The main idea of the text is ________.
A. a new discovery about the dolphin
Jean-Michael Lourdis was a promising young pianist. But when the young man played, it seemed to him, as if his hands were iron. He worried so much about his playing that he became oversensitive (过度敏感的) to the comments of his playing. Unfortunately, in those days, a critic(批评家) was not considered a critic, unless he found something wrong. This attitude of the critics would often leave the young man ready to give up his dream and return home.
1. According to the passage, Jean-Michael Lourdis _________.
B. cared too much about what the critics had said
2. A critic in those days usually _________.
A. found fault with musicians' performances
3. The young musician was painful because __________.
C. some of the comments were so unkind
4. The comments mentioned all EXCEPT __________.
D. wonderful
5. Jean Sibelius came to visit the young musician because __________.
C. he wanted to tell the young man his performance was great
Have you eaten too much over the holiday s? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails (指甲) against a part of your body) and twitching (moving suddenly and quickly when you don't want to) is an important way of burning up calories(热量).
1. Based on the passage, the word “fidgeting” means which of the following?
D. Moving one's body nervously
2. Why do some people get fat and other people stay slim according to the passage?
C. Those who burn up more calories than others will be thinner.
3. What was found in the scientific experiment?
A. The energy burned up by fat people when they fidget was more than that burned up by thin people when they fidget.
4. To be thin in a pleasant way is to be_____.
C. slim
5. A fidget habit is thought to be ____by scientists.
A. a way to lose fat
If you have been joining in chat room conversations, or trading email with web pals (网友),you have become one of the millions who write in a special, short form of English.
Throughout the world, every night children and their elders are “talking” online, many of them all talking at the same time.
1. When people are on-line, they talk by ______.
D. making use of an especially short form of English
2. The Internet makes many people in the world ______.
A. talking at the same time
3. The sentence "There's neither time nor space for explanations" means that______.
C. People on-line have to express themselves in a simple way
4. If you get 19/M/HK as an answer to your A/S/L, it means______.
B. you are talking to a boy 19 years old and he lives in Hong Kong
5. Which of the following is a way to save on-line time?
A. People seldom use capital letters or punctuation marks.
The Great Wall of China is the longest wall in the world. It is more than 6000 kilometers long, about 7 meters high, 5 to 6 meters wide. It is known to be the only one of the structures built by men on Earth that can be seen from the moon.
The Potala（布达拉宫）in Tibet, China, is the world’s highest palace. It is over 3 kilometers above the sea level.
1. The Great Wall of China is the longest wall in the world because it is _____.
A. over six thousand kilometers long
2. The biggest burial place that men ever built is in ______.
B. Egypt
3. The Sears Tower is about ____, so it is the tallest office building in the world.
C. four hundred and forty-three meters high
4. The only one of the objects built by men on the earth that can been seen from the moon is _____.
B. the Great Wall
5. The Potala is in _____.
D. China
People have been talking about health for a long time because people know the importance of it. People's understanding of health also becomes deeper with the progress in scientific research. Recently the term "health" has come to have a wider meaning than it used to. It no longer means just the absence of illness. Today, health means the well-being of your body, your mind and your relationship with other people. This new concept of health is closely related to another
1. ______leads to people's deeper understanding of health.
B. Progress in scientific research
2. According to the passage, to people of today, health means______.
D. overall satisfaction with life
3. The emphasis of health has shifted nowadays because_____.
A. people enjoy better conditions of living and they can live longer
4. We can infer from the passage______.
B. the overall quality of people's lives improved greatly in the 20th century
5. This passage is mainly about____.
A. different understandings of the term "health"
The first true piece of sports equipment that man invented was the ball.
In an cient Egypt, as ever, where pitching stone was a favorite children’s game. But a badly thrown rock could hurt a child. Looking for something less dangerous to throw, the Egyptians（埃及人）made what was probably the first ball.
B. Throwing stones was dangerous.
2. The first balls were made of _____.
A. grass or leaves held together by vines
3. For the Egyptians, ball games were _____.
D. educational
4. Ball games invented by the Egyptians _____.
C. have their own set of rules
5. What is the best title for the passage?
C. The First Ball Games
Passage 22
Bob was happy. He was at a new school, and the other students were friendly. “Hi, Bob!” they said. But some students said, “Hi, Peter!” Bob didn't understand. He asked another student, “Why do some students call me Peter?”
1. Bob was _______ at a new school.
B. happy
2. Some students thought _______.
C. Bob was Peter
3. Bob saw Peter _______.
A. in Peter's house
4. John knew the story from_______.
A. the newspaper
5. Bob, Peter and John were_______.
C. brothers
Passage 23
Look at the instructions on the bottle of the medicine and then choose the right answers.
John is twelve years old. He had a bad cold and coughed day and night. He went to see a doctor. The doctor gave him some cough medicine.
1. John should take ____ a day.
B. 3 teaspoonfuls
2. The medicine should be kept in _______.
A. a fridge
3. John should ____ before he takes it.
A. shake the medicine well
4. When people are ____ years old, they cannot take this medicine.
C. two
5. John will ____ the medicine when it is left after Dec.1st, 2003.
A. throw away
Passage 24
Mrs. Jones was still cleaning the house when her husband came back from work. She was wearing dirty, old clothes and no stockings, her hair was not tidy, she had dust on her face, and she looked dirty and tired. Her husband looked at her and said, “Is this what I come home to after a hard day's work？”
1. What was Mrs. Jones doing, when her husband came back from work?
C. Cleaning the house.
2. Mrs. Jones was Mrs. Smith’s_______.
D. neighbor
3. Mr. Jones was ______ when he saw his wife after a hard day’s work.
B. angry
4. What was Mrs. Smith doing when her husband came home from work?
A. Waiting for her husband in her best dress.
5. Mr. Smith shouted at his wife because ______.
B. he thought that she was going out in her beautiful dress
Passage 25
Sixty-year-old grandmother, Fiona McFee, is going to stop working next year and she decided to realize a childhood dream and sail around the coast of Scotland in a small boat. Although the inside of the boat is very cosy, it has no running water or electricity. Fiona says she can live without these things but she plans to take her small CD player, her hot water bottle and a bag of books to make sure life isn’t too uncomf ortable.
1. The underlined word cosy in the first paragraph means ____ .
C. comfortable
2. When Fiona McFee said “---I just hope it loves me”, what she meant was ____
C. I hope it will bring me a safe sailing as a return for my love of it.
3. The reason why she would like to have the sail is that ____.
D. she wants to be still active when she gets old
4. What kind of person would you say the old woman is?
D. Someone who is open, honest and brave .
5. The best title for this passage is ____ .
A. Life Begins at Sixty
Passage 26
William Henry Harrison, the ninth President of the United States, was born in a small town. As a boy, he was quiet and shy. In fact, he was so quiet that everyone thought he was stupid.
Because of that, the people of the town liked to play jokes on him.
1. William Henry Harrison was born_____.
D. in a small town
2. People thought he was stupid because ______.
B. he was so quiet
3. Whenever people played tricks on him, he was asked to_____.
C. choose between a nickel and a dime
4. His mother took him aside and asked why _____.
A. he always chose the nickel instead of the dime
5. We can infer from the story that William Henry Harrison was ______.
D. clever
Passage 27
When we can see well, we do not think about our eyes often. It is only when we can not see perfectly that we come to see how important our eyes are.
People who are nearsighted（近视）can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing and reading, become nearsighted. Then they have to wear glasses in order to see distant things clearly.
1. We don't know that our eyes are of great importance until______.
B. we can't see clearly
2. According to the passage, a______ is more likely to be nearsighted.
A. teacher
3. A nearsighted person usually _____.
B. wears glasses
4. People who are farsighted ______.
A. cannot do a lot of close work without glasses
5. Eyes are very important to us because _____.
C. we cannot see anything without them
Passages 28
A pretty, well—dressed young lady stopped a taxi in a big square, and a said to the driver, "Do you see that young man at the other side of the square?"
"Yes," said the taxi driver. The young man was standing outside a restaurant and looking impatiently (不耐烦地) at his watch every few seconds.
1. How did the young woman get to the square?
D. The story doesn't tell us.
2. Why did the lady stop the taxi?
C. Because she wanted to go to the restaurant in it.
3. The young man at the other side of the square_______.
A. had probably been waiting for a long time
4. The young lady was_______.
A. clever at making excuse
5. Had she tried not to be late?
B. No, she was just pretending that she had tried.
Passage 29
They are in close contact（接触）with nature. They make friends with trees and stones. They breathe fresh air. They fight with strong winds. They listen to the song of birds.
This contact with nature is good for health. There are many diseases that are common in the city, but are not found in the country. For example, nearsightedness is almost unknown to country people.
1. What can’t country people often enjoy?
A. Musical concerts.
2. What is probably more expensive in the country than in the city?
B. Beer
3. What is NOT true of country life?
A. The traffic accident rate is very high in the country.
4. Which of the following statements is true according to the passage?
D. The prices of farm products are lower in the country than in the city.
5. Which of the following would be the best title for the passage?
C. Country Life
Passage 30
Young people and older people do not always agree. They sometimes have different ideas about life, work and play. But in one special program in New York State, adults and teenagers live together in peace. Each summer 200 teenagers and 50 adults live together for eight weeks as members of a special work group. Everyone works several hours each day. The aim is not just to keep busy bu
1. What is the passage mainly about?
D. How adults and teenagers live together in a special group.
2. When and where was the special program offered?
C. Every summer in New York State.
3. What will people do when someone breaks a rule?
B. Have a group discussion about it
4. Which of the following is NOT stated directly in the passage as a purpose of the program?
C. To find a way to solve the generation gap.
5. What do the teenagers NOT do when they are free?
C. They build houses.
春年级计应班考试复习题含答案
电子表格考试练习题及答案 第1章 练习题 1．选择题 (1)关闭当前工作簿但不退出Excel，不能实现这一操作的是_____。 A．双击该工作簿窗口的控制菜单图标 B．在“文件”菜单中选“关闭”命令 C．在“文件”菜单中选“退出”命令 D．单击该工作簿窗口的关闭按钮 (2)下面的操作不能选定整个工作表的是_____。 A．用鼠标单击工作表左上角的“全选”按钮 B．用快捷键Ctrl+A C．在单元格名称框中输入A：IV，然后回车 D．选取“编辑”菜单中的“全选”命令 (3)用模板建立工作簿的正确操作是_____。 A．单击“常用”工具栏的“新建”按钮，弹出“新建工作簿”任务窗格，打开“模板”对话框，再进行设置 B．选择“文件”菜单中的“新建”命令，弹出“新建工作簿”任务窗格，打开“模板”对话框，再进行设置 C．打开一个已有的工作簿 D．在“另存为”对话框的“保存类型”列表框中选择“模板”类型 (4)不能选定一个连续的单元格区域的操作是_____。 A．将鼠标对准单元格区域左上角的单元格，拖动鼠标至单元格区域右下角的单元格B．单击单元格区域左上角的单元格，按住Shift键，单击区域右下角单元格 C．单击单元格区域左上角的单元格，按住Ctrl键，单击区域右下角单元格 D．在名称框中输入单元格区域的引用地址，按回车键 (5)给Excel文件加上读写权限，进行加密设置，应采用的操作是_____。 A．在“另存为”对话框中，打开“保存选项”对话框设置 B．通过“工具”菜单，打开“选项”对话框进行设置 C．通过“工具”菜单的“保护”命令进行设置 D．通过“属性”对话框进行设置 2．填空题 (1)启动Excel后产生的第1个空白工作簿的名称为_book1。 (2)工作表中第5列的列标是___E__。 (3)要选中多个不连续的单元格区域，应选中一个区域后，按住_Ctrl____键，再选取其他区域。 (4)选择“帮助”菜单中的“Microsoft Excel帮助”命令或按Fl键，打开_EXCEL 帮助____任务窗格。 (5)打开文件时，要在“打开”对话框中能够预览文件，需要在__ 属性___对话框的__摘要___选项卡中进行设置。
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《计算机网络》期末考试试卷
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9．用数字信道传输数字信号需要进行(9)处理。 A)调制B)编码C)解调D)变换 10．现代电话采用(10)通信方式。 A)单向通信B)半双工C)单工D)全双工 11.数据远程有线通信常用的传输介质是(11)。 A)光纤B)半导体C)CPU D)内存 12.局域网中常用的传输介质是(12)。 A)超短波B)粗轴电缆C)双绞线D)细轴电缆 13．波特率是指(13)。 A)单位时间传输帧个数B)单位时间传输码元个数 C)单位时间传输包个数D)单位时间传输bit数 14．下面描述信道带宽的量是(14) A)信号电流B)信号电压C)波特率D)比特率 15．下面(15)不属于常用的信号调制方法。 A)调幅B)调流C)调相D)调频 16．多路复用技术是指(16)。 A)一线多信道B)多线单信道C)多线多信道D)一线一信道17．波分多路复用技术所用的传输介质是(17)。 A)双绞线B)同轴电缆C)光纤D)微波 18.频分多路复用技术的传输介质应当(18)。 A)传输效率高B)频带宽C)切换容易D)有多条线 19.分组交换比报文交换优越的地方是(19) A)串行传输B)顺序传输C)切换传输D)并行传输20．数据报是(20)服务。 A)面向无连接B)面向连接的C)有连接有确认D)A),C)共有 21.在奇校验中，如果被校验数据中“1”的个数为偶数个，校验位应为(21)。
高三语文高考模拟考试试题
高三语文模拟试题 一、现代文阅读（35分） （一）论述类文本阅读（本题共3小题，9分） 阅读下面的文字，完成1-3题。 西辽河流域、长江中下游地区及海岱地区这些新石器文化核心区衰落，中原核心区稳步崛起，中原中心趋势形成，这是中国史前文化格局改变的历程。旧大陆西部即我们传统上所说的中亚和西亚传来的农作物（大麦、小麦）和绵羊、山羊、黄牛和马等家畜，显然对中国史前文化格局的改变起了作用。同时，伴随着冶金技术的东传，青铜铸造技术在中原地区扎根、发芽、开花和结果，标志着青铜时代全球化的形成。然而，西来的新作物与家畜，对于中原地区的产业仅为补充，未起到多大的作用。青铜时代的全球化对于中原的崛起作用有限。因此可以说，青铜时代的全球化不是中国史前文化格局彻底改变的根本动因。 造成中国新石器时代传统核心区域文化衰落以及中国史前文化格局彻底改变的根本原因，是以长江流域为代表的史前商品经济基础与以黄河中游地区（后来的中原）为代表的小农经济基础之间长期博弈。最终，黄河中游地区由于其经济基础和上层建筑总体和谐并充分适应东亚地区的生存环境，战胜了长江流域的商品经济，导致中国史前文化格局的改变。 以专营农牧两侧的中间商贸为经济基础的半月带社会政体或文化中心，是长江中下游地区传统商品经济文明中心衰落后兴起的，半月形地带的兴起得益于其农牧交错带的经济地理区位。 随着夏商周三代东亚文明中心的形成，半月带文化与文明衰落，半月带的功能从欧亚东西双方贸易的媒介，转变为在中原和欧亚草原之间的“保护膜”，如同
带有瓣膜的细胞壁，总体上起到阻隔东西方自由交流的作用。正如英国学者杰西卡·罗森夫人所认为的那样，东西双方只是透过半月带即她所谓的“中国弧”进行“接触”，并非“交流和融合”，中原仅仅是有选择地接受西方的文化因素与技术。中原透过半月带这一“保护膜”向西方输出的恐怕主要也只有丝绸和粟了。 考古资料表明，中原夏商周三代许多先进的发明和政治策略，都被视为国家机密——核心“秘密武器”而被禁止西传，比如发达的天文历法知识体系、完备的圭表测量技术，以及天下观、礼乐制度观念、玉礼器制度观念等等，从而进一步加大了东西方文化的差异。与此相反的是，中原许多政治发明和技术，却对朝鲜半岛、东南亚地区开放，影响极为深远。显然，先秦时期中原政权始终将东亚大陆视为自己安全的腹地和大后方，而将欧亚草原高地视为外方。 先秦时期中原政权的这种亲疏观念，使得以旧大陆西部为策源地的“青铜时代的全球化”停留在浅表的金属、作物、家畜三类技术层面，并主要将青铜、牛羊、小麦引入“祀与戎”领域，这不仅加深了青铜时代东西双方的异质化，还进而使先秦时期的中原成为坚挺的东亚文明核心。 (摘编自何驽《中国史前文化格局与青铜时代全球化》) 1．下列关于原文内容的理解和分析，正确的一项是（3分） A．中国史前文化格局的改变表现为西辽河流域、长江中下游地区等新石器文化核心区的衰落。 B．在长江中下游地区传统商品经济文明中心衰落后，半月带的兴起，与半月带独特的经济地理区位优势有关。 C．西来的新作物与家畜对中原地区的影响有限，中国史前文化格局的改变与西来文化、文明无关。
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