C The world’s first plastic magnet (磁性) to work at room temperature has passed - 高中英语试题 - 超级试练试题库

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C
The world’s first plastic magnet (磁性) to work at room temperature has passed the elementary test of magnetism. Its creators at the University of Durham in the UK have used it to pick iron filings (铁屑) from a laboratory bench.
In 2001, chemists from the University of Nebraska-Lincoln claimed to have created the world’s first plastic magnet, but it only worked below 10 Kelvin (开氏温度). Other researchers have made plastic magnets, but generally they only function at extremely low temperatures, or their magnetism at room temperature is too weak to be business use.
So the Durham team can claim to have made the first plastic magnet that could be used in everyday products. One of the most likely applications is in the magnetic coating of computer hard discs, which could lead to a new generation of high-capacity discs.
Jerry Torrance, a material scientist who is an adviser to some of the world’s largest electronics and engineering companies, including IBM, describes the work as “a great scientific breakthrough”. However, he says that practical applications are probably still a long way off.
At first the new polymer (聚合物) showed little sign of magnetism, and after three months the researchers had reached the point where they felt that trying to induce (诱发) magnetism in this polymer was a waste of time. “Just as we were about to give up and try a different way, we decided to check the samples for a last time,” says Sean Giblin.
It was a fortunate decision, because over the months the original polymer had developed magnetic characteristics. Further groups of polymer proved its magnetism and ruled out the possibility that the magnetism had been caused by pollution. In addition, X-ray diffraction data (衍射数据) showed an increase in the straight line of the polymer chains over three months, which probably accounts for the increase in magnetism.
Although the polymer’s magnetism is weak compared with metal magnets, the researchers are confident that they can improve it. And in addition to computer hard discs, the team thinks that plastic magnets could have important medical applications because organic magnetic materials are less likely to be rejected by the body.
64. The plastic magnets made by the chemists from University of Nebraska-Lincoln and other researchers couldn’t be used in everyday products because        .
A. they didn’t pass the elementary test of magnetism
B. they couldn’t pick up iron filings from a laboratory bench
C. they wouldn’t work at room temperature
D. they could only be used at high temperature
65. The increase in magnetism over the months is probably caused by        .
A. checking the samples             B. a wise decision
C. pollution
D. the increase in the straight line of the polymer chains
66. The plastic magnets could be used        .
A. to compare with the metal magnets
B. to coat computer hard discs
C. to produce medicine
D. to lower the temperature
67. What would be the best title for the passage?
A. The Birth of Practical Plastic Magnet
B. The World’s First Plastic Magnet
C. A Fortunate Decision
D. The Applications of Plastic Magnets

答案

小题1:C
小题2:D
小题3:B
小题4:A

解析

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试题【 C The world’s first plastic magnet (磁性) to work at room temperature has passed 】；主要考察你对题材分类等知识点的理解。[详细]

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四．阅读理解。（40分）
（A）
Overhead bridges are found in many parts of. Beijing, especially in places where   traffic is very heavy and crossing the road is dangerous.
The purpose of these bridges is to enable pedestrians to cross roads safely. Over-   head bridges are used in very much the same way as zebra crossings. They are more ef-                                                       ficient although less convenient because people have to climb up a long flight of steps.   This is inconvenient especially to older people. When pedestrians use an overhead   bridge, they do not hold up traffic. However, when they cross a busy road using a ze-   bra crossing, traffic is held up, this is why the government has built many overhead   bridges to help pedestrians and to keep traffic moving at the same time.
The government of Beijing has spent a large amount of money in building these   bridges. For their own safety, pedestrians should be encouraged to use them instead of   risking their lives by dashing across the road. Old people, however, may find it a little   difficult to climb up and down the steps, but it is still much safer than walking across   the road with all the danger of moving traffic.
Overhead bridges serve a very useful purpose. Pedestrians, both old and young, should make it a habit to use them. This will prevent unnecessary accidents and loss of life.
1. What is the advantage （优点）of overhead bridges mentioned in this passage?
A. Taller trucks can pass under them.
B. Pedestrians can climb up and have a view of the city.
C. They are safer for pedestrians and can keep traffic moving at the same fame.
D. They are easier and more convenient for the pedestrians.
2. Which of the following statements is true according to the passage?
A. Overhead bridges are found in every part of Beijing.
B.Overhead bridges are only found in center of Beijing.                            C.Overhead bridges are found in many parts of big cities in China.                   D. Overhead bridges are found in places where traffic is heavy.
3.Theunderlined words a zebra crossing probably mean _______.
A. a safe place across a road for pedestrians to walk across the road.
B. A wild animal from Africa that looks like a horse with broad dark brown and white stripes on its body
C. A safe place across a road for zebra to walk across the road
D. A safe place across a road for children to play a game.
4. What is the writer"s attitude（态度） towards overhead bridge?
A. It is inconvenient for older people to walk across the road.
B. It is much safer for pedestrians thought climbing up and down the steps may be a little difficult.
C. An overhead bridge is more beautiful than a zebra crossing.
D. To build overhead bridges is the business of the government.

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(B)
The Hawaiian Islands are situated（位于） about two thousand miles away from North   America, right in the middle of the Pacific Ocean. Despite the distance the Islands actually make up the fiftieth state of the United States. The Islands were all formed by volcano（火山） eruption and on the largest of the islands, Hawai, or the Big Island, there are still two active volcanoes, the Mauna Loa and the Kilauea, which still erupt every few years.
On the Hawaiian islands the natives have a particularly strange way of indicating(指明) directions. They don"t use the north, south, east and west system common to the rest of the world. They use the mauka and makai system. Mauka means "mountain".The mountains in Hawaii are always at the center of the islands, as these are volcanic is lands. Makai means "the sea". The islands are small and the system is simple. Wherever you want to visit, it can always be described in terms of where it lies in relation to the mountains and the sea. A typical conversation(谈话) between a native Hawaiian and a visitor might go as follows.
VISITOR： Excuse me! Could you tell me where the Sheraton Hotel is?            HAWAIIAN; Well ... Let me see ! From here it"s two blocks mauka,and then one
block makai. You can"t miss it!
1. This article would be most likely to appear in which of the following?
A. A novel                          B. A collection of stories
C. A travel book                   D. a women"s magazine
2. Choose the most suitable title for the article.
A. The Big Island                    B. Giving Directions in Hawaii
C. Volcanoes                        D. The Hawaiian Islands
3. In Hawaii the mountains are in the center of the islands because_____
A. of the weather                    B. of die geological conditions
C. the islands were created by volcanic eruptions
D. of the islands" location in the pacific
4. To find your way in Hawaii, you must _______.
A. refer to geographical directions      B. refer to well - known establishments
C. refer to the location of the mountains and the sea
D. refer to the earth and the sea

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(C)
The Romans built great "aqueducts" to carry fresh water from the mountains to the cities. Many of these aqueducts are still standing today. The Romans also built great pipes under the ground to carry away the sewage. In Rome, one of these sewage pipes (sewers) is still used today; it is 2,000 years old. The Roman Emperors even set up a government health service. They built the first great public hospitals in Europe, and they paid doctors to look after poor people.
Then the Roman Empire fell to pieces, these civilized methods of treatment disappeared from most of Europe, for more than a thousand years. People went back to the old ways. They lived in dirty conditions which helped to cause diseases（疾病）; and they asked God to cure the disease. They shut mentally sick people in prisons. Or they burnt them alive because they were supposed to have magic powers.
But the work of the Greek and Roman doctors was not lost. Over a thousand years
ago, they Arabs moved into many of the Mediterranean countries. They took big parts of the old Roman lands. They translated the Greek and Roman medical books into Arabic. Arab doctors themselves make many new discoveries.
When civilization(文明) at last came back to Europe, men once again translated the Greek and Roman works on medicine into Latin. Slowly－very slowly －European doctors discovered again the things that the Greeks and Romans had known so long ago. Slowly, they began to make new discoveries. They found out more about the way the body works--the way our blood goes round our bodies, the way our nerves（神经） send messages from our brains to our muscles, the way these muscles move our bodies.
1.     The word "aqueduct" probably means _______.                                 A. something which was built long ago
B. something invented by a Roman Emperor
C. a big pipe under the ground
D. something built to supply clean water for the citizens
2. Which of the following is true?
A. The sewage pipes built by the Roman are no longer in use now.                  B. Sewage pipes in Arabia were built by the Romans.                           C. A sewage pipe still being used today in Rome was built 2,000 .years ago.          D. The ancient Romans got their drinking water from underground pipes.
3. Which of the following is NOT true?
A. A government health service was set up in ancient Rome.
B. The first public hospital in Europe was built in Rome.
C. m ancient Rome doctors were paid by the government.
D. Those who were mentally sick were all burnt alive in the Roman Empire.
4. In this article, "civilized methods of treatment" refers to _______.
A. advanced forms of health care
B. the way they burnt the bodies of the dead
C. imprisonment of the mentally sick
D. what was called magic power"s

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(E)
Messages can be sent across the land by means of the electric telegraph; but you cannot put up a line of telegraph posts across the sea. Messages can be sent across the
ocean by radio or by cable(电缆). The cable lies on the sea bottom and it has to have very good insulation. If any part of it is weak, the water will get through and stop all signals .
The first cable under the sea was between England and France. It was laid（放置） in 1851. In 1851 engineers tried to lay a cable across the Atlantic Ocean, but they met a
lot of difficulties. Halfway across the Atlantic the cable broke, and the ship that was laying it had to return.
Kelvin advised that another cable ought to be laid. It was made ready, and put on board a big ship. Kelvin and his friends traveled with it and after many days of hard work, they reached America without breaking the cable. Kelvin himself sent the first
message by cable from America to Britain. Unfortunately only 732 messages were sent through this cable before it broke.
The next cable was laid in 1866, and this time there were no problems. The ship
that laid it was the Great Eastern, one of the strongest ships that have ever been built.
It was driven by powerful engines and also by sails .
1. The undersea cable must be made strong enough to prevent _____.
A.. fishes from eating it     B. enemy stealing it
C.water getting through it    D. others cutting it
2. The first cable across the Atlantic _______.
A. was the first undersea cable
B. was only laid half- way
C. broke after only 732 messages were sent
D. never broke
3. The undersea cable Kelvin and his Mends laid was between_____.
A. England and France    B. America and England
C. American and France   D. England and Britain
4. The cable that Kelvin and his friends laid went through __
A. the Pacific Ocean      B. the Indian Ocean
C. the Atlantic Ocean     D. the Arctic Ocean
5. This passage mainly tells us _______.
A. how Kelvin laid the cable
B. how the scientists discovered the cable
C. the history of the cable in the world
D. how to lay the cable in the sea

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The United States covers a large part of the North American continent. Its neighbors are Canada to the north and Mexico to the south. Although the United States is a big country, it is not the largest in the world. In 1964, its population was over 185,000,000.
When this land first became a nation, after winning its independence (独立) from England, it had thirteen states. Each of the states was represented(代表) on the American flag by a star. All these states were in the eastern part of the continent. As the nation grew toward the west, new states were added and new stars appeared on the flag. For a long time, there were 48 stars. In 1959, however, two more stars were added to the flag, representing the new states of Alaska and Hawaii.
Indians were the first people of the land which is now the United States. There are still
many thousands of Indians now living in all parts of the country. Sometimes it is said that the Indians are "the only real Americans". Most Americans come from all over the world. Those who came first in greatest numbers to make their homes on the eastern coast of North America were mostly from England. It is for that reason that the language of the United States is English and that its culture and customs are more like those of England than those of any other country in the world.
68. The United States didn"t have______ states until _____.
A. thirteen; 1959      B. fifty; 1959
C. fifty; this land first became a nation     D. fifty;1964
69. Why is English the language of America?
A. English is the Indian"s native language.
B. Most Americans come from all over the world.
C. Most of the people who first settled in America were from England
D. Canada is America"s nearest neighbor.
70. Which of the following is the best title for the passage?
A. The States of America            B. The Language of America
C. The United States of America      D. The Culture and Customs of America

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