The earth is not the only body that travels around the sun. With it are eight other planets, fellow members of the sun’s family.
Two of them, Mercury (水星) and Venus, are nearer while the other six, namely Mars, Jupiter, Saturn, Uranus, Neptune and Pluto, also in their given order from the sun, are farther from the sun than the earth is. The farther they are, the longer trips they make around the sun. People noticed long ago that these traveling bodies moved around in the sky in definite paths. It is a force called gravity that holds them in their paths.
We know that every little bit of matter in the universe pulls upon every other bit of matter. The pull between two bodies is proportional (成比例的) to the product of their masses. Because the sun is so large the pull between the sun and the planets are thus great. If it were not for this pull, the planets would fly off into space. In the same way there exists a pull between the earth and the moon, which keeps the moon traveling in its orbit around our planet, the earth. Gravity holds you to its surface, and pulls back to it the ball which you throw into the air. Of course the ball also pulls on the larger earth but the earth is so much larger that the pull is not noticed.
Now remember that large bodies exert a greater pull than smaller ones which contain less material. But each object in the universe, no matter how small, pulls on all other objects to some degree.
1.There are ________ that travel around the sun in the sun’s family.
A．nine planets B．eight planets
C．one star and ten planets D．the earth and the sun
2.Which two planets make the longest trips around the sun among all the planets in the solar system?
A．Mercury and Venus. B．Neptune and Pluto.
C．Saturn and Uranus. D．Mars and Jupiter.
3.From the passage we can see__________
A．all the objects, big or small, must exert the same pull on one another
B．large objects exert the same pull on anybody as small objects
C．small objects exert the same on large ones
D．each object in the universe exerts a pull on all other objects
4.From the sentence “The pull between two bodies is proportional to the product of their masses.” We can infer that the pull between__________
A．the sun and the moon is greater than between the sun and the earth
B．the earth and the moon is greater than that between the sun and the earth
C．the sun and the earth is greater than that between the earth and the moon
D．the sun and the earth is the same as that between the earth and the moon
1.A
2.B
3.D
4.C
【解析】
试题分析：文章介绍了太阳系围绕太阳转的星球相互的关系，引力的大小并且解释了这种现象的原因。
1.细节题：从第一段的句子：The earth is not the only body that travels around the sun. With it are eight other planets, fellow members of the sun’s family.可知共有9个星球围绕着太阳转。选A。
2.细节题：从第二段的句子：Neptune and Pluto, also in their given order from the sun, are farther from the sun than the earth is. The farther they are, the longer trips they make around the sun. 可知Neptune and Pluto.是绕太阳的路程最远。选B
3.细节题：从最后一段的句子：But each object in the universe, no matter how small, pulls on all other objects to some degree.可知答案是D
4.句意理解题：从后面的句子：Because the sun is so large the pull between the sun and the planets are thus great.可知体积越大，天体的引力就越大。选C
考点：考查科普类短文
点评：本文属于科普文章，细节题居多，答题时在文章找到对应的地方，用笔进行标记，这有利于后期有时间检查时可以立刻找到答案的位置。仔细理解作者所讲的意思，再结合选项，通过排除法和自己对全文的把握，选出正确答案。
科目：高中英语 来源：2012届重庆市渝北中学高三（上）第三次月考英语试卷 题型：阅读理解
LONDON: What could possibly be wrong with planting trees? The benefits are obvious; they firm the soil, soak up (摄取) extra water and take carbon dioxide (二氧化碳) out of the atmosphere.
However, it now turns out that planting trees could add to global warming.
Tree roots do a great job of keeping soil firmly on the ground and out of the wind’s power. The problem is that some of those dust clouds play an important part in taking in carbon dioxide.
Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface. The dust fuels oceanic life.
Dust from China is carried east and left in the Pacific Ocean. If a tree-planting programme there is successful and the dust supply reduced, the final result may be that less carbon dioxide gets locked away in the ocean.
Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work “shows clearly the complexity of the system and the importance of not tinkering(粗劣地修补) with it without understanding the results. For this reason the need is to focus(集中) on cutting carbon dioxide giving off rather than monkeying (瞎弄) about with the land surface.”
An American scientist, Robert Jackson, has shown that when native grassland areas are invaded(侵入) by trees, carbon is lost from the soil. “We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees, ” says Jackson.
In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed(超过) by the loss of carbon from the soil below ground. Countries that plan to combat global warming by planting trees may have to think again.
Solutions to environmental problems are often more complex than they first appear, and understanding the Earth’s climate is a very great challenge.
【小题1】People usually hold the opinion that_____________.
| A．huge dust storms can destroy carbon dioxide |
| B．huge dust storms can destroy the oceans on the earth |
| C．huge dust storms can’t do anything beneficial for man |
| D．planting trees is the only way to control huge dust storms |
| A．dust plays a more important part than trees |
| B．trees shouldn’t have been planted in dry places |
| C．carbon dioxide is harmful to everything on the earth |
| D．environmental problems are more complex than expected |
| A．grassland areas should be covered by forests |
| B．trees hold more carbon than grasses |
| C．carbon can turn grass into dust |
| D．less carbon can make trees grow faster |
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科目：高中英语 来源：2012-2013学年江西省高安中学高一上学期期末考试英语试卷（带解析） 题型：阅读理解
Most earthquakes occur within the upper 15 miles of the earth’s surface, but earthquakes can and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much.
The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an erect set (坚立架), it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir was not strong, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result.
There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic (地震的) sea waves, or tsunamis (海啸). These are often called tidal waves, but the name is incorrect. They had nothing to do with tides. In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbors, they pile up into walls of water 6 to 60 feet high. The Japanese call them “tsunamis” meaning “harbor waves”, because they reach a sizable (相当大的) height only in harbors.
Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An earthquake warning system is in use to warn all shores likely to be reached by the waves. But this only enables people to leave the threatened shores for higher ground: There is no way to stop the oncoming wave.
【小题1】Which of the following can NOT be concluded from the passage?
| A．The number of earthquakes is closely related to the depth. |
| B．Roughly the same number of earthquakes occur each year. |
| C．Earthquakes are impossible at depths over 460 miles. |
| D．Earthquakes are most likely to occur near the surface. |
| A．faulty building construction |
| B．an earthquake’s strength |
| C．widespread panic in earthquakes |
| D．ineffective instruments |
| A．their high speed |
| B．the wide shores |
| C．their silent movements |
| D．their long wave length |
| A．help reduce fear |
| B．find ways to stop them |
| C．be warned early enough |
| D．develop warning systems |
| A．two | B．five | C．four | D．three |
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科目：高中英语 来源：2012-2013学年内蒙古包头三十三中高二上学期期中考试英语试卷（带解析） 题型：阅读理解
Will life in the future be better, worse or the same as now? Futurologists（未来学家）predict that life will probably be very different in 2050.
First of all, it seems that TV channels will have disappeared by 2050. A computer will send the program directly to the television. On TV screen appear holograms（全息图）, which are pictures with certain height, width and depth. We will be able to see, smell and touch the things that we see on television.
Water has become one of our most serious problems. Agriculture is changing and people are growing more fruit and vegetables to export. Demand for water will increase ten times in 2050. Some futurologists predict that water will be the cause of war if we don’t act now.
In transport, cars will run on new fuels and go very fast. A car will have computers to control its speed and there won’t be any accidents. On the other hand, space planes will take people around the earth in about three hours. People will fly from Los Angeles to Tokyo by space plane in just half an hour.
In the field of technology, robots will have replaced people in factories. By 2050, we will see robots everywhere. They do not ask for pay rises or go on strike, and they work 24 hours a day.
Medicine technology will have conquered many diseases by 2050; we will be able to help blind and deaf people see again and hear again. Scientists have discovered how to control genes. They have already produced clones of animals and will be able to produce clones of people and decide how they look, how they behave and how much intelligence they have. If you want all this to come true, you should study science and technology hard.
【小题1】What is the main difference between today’s and 2050’s TV?
| A．We can use a computer to turn off the TV set. |
| B．We can talk with the characters appearing on TV. |
| C．We can choose whatever we like to see on TV. |
| D．We can touch the things we see on TV. |
| A．Technology. | B．Medicine. | C．Movies. | D．Agriculture. |
| A．The lack of water. | B．The less farmland. |
| C．The shortage of robots. | D．The more space planes. |
| A．people will spend less time in studying |
| B．more and more people needn’t go to school |
| C．people will have more time to relax or rest |
| D．no patients will be found in the world |
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科目：高中英语 来源：2011届湖北省武汉市武昌区高三上学期元月调研测试英语卷 题型：阅读理解
Scientists who try to predict earthquakes have gotten some new helpers recently—animals.
That’s right, animals. Scientists have begun to understand what farmers have known for thousands of years. Animals often seem to know in advance that an earthquake is coming, and they show their fear by acting in strange ways. Before a Chinese quake in 1975, snakes awoke from their winter sleep early only to freeze to death in the cold air. Cows broke their halters (缰绳) and tried to escape. Chickens refused to enter their cage. All of this unusual behavior, as well as physical changes in the earth, warned Chinese scientists of the coming quake. They moved people away from the danger zone and saved thousands of lives.
One task for scientists today is to learn exactly which types of animal behavior predict quakes. It’s not an easy job. First of all not every animal reacts to the danger of an earthquake. Just before a California quake in 1977, for example, an Arabian horse became very nervous and tried to break out of his enclosure. The Australian horse next to him, however, remained perfectly calm. It’s also difficult at times to tell the difference between normal animal restlessness and “earthquake nerves”. A zoo keeper once called earthquake researchers to say that his cougar had been acting strangely. It turned out that the cat had an upset stomach.
A second task for scientists is to find out exactly what kind of warnings the animals receive. They know that animals sense far more of the world than humans do. Many animals can see, hear, and smell things that people do not even notice. Some can sense tiny changes in air pressure, gravity, or the magnetism of Earth. This extra sense probably helps animals predict quakes.
A good example of this occurred with a group of dogs. They were shut in an area that was being shaken by a series of tiny earthquakes. (Several small quakes often come before or after a large one.) Before each quake a low booming sound was heard. Each boom caused the dogs to bark wildly. Then the dogs began to bark during a silent period. A scientist who was recording quakes looked at his machine. It was acting as though there were a loud noise too. The scientist realized that the dogs had reacted to a booming noise. They also sensed the tiny quake that followed it. The machine recorded both, though humans felt and heard nothing.
In this case there was a machine to monitor what the dogs were sensing. Many times, however, our machines record nothing extraordinary, even though animals know a quake is coming. The animals might be sensing something we measure but do not recognize as a warning. Discovering what animals sense, and learning how they know it is a danger signal, is a job for future scientists.
【小题1】Through the passage the writer hopes to explore __________.
| A．why animals send a danger signal before an earthquake |
| B．how animals know when an earthquake is coming |
| C．why animals not men have good sense of danger |
| D．how much animals know about an earthquake |
| A．chickens refused to go out of their cage |
| B．snakes were frozen to death in their caves |
| C．snakes awoke from their winter sleep earlier |
| D．cows broke their halters and escaped from their sheds |
| A．An Arabian horse tried to escape from his enclosure. |
| B．A cougar had an upset stomach unexpectedly. |
| C．An Australian horse was perfectly calm. |
| D．A cat acted very strangely in a zoo. |
| A．find out that the machine could record unusual happenings |
| B．compare the reactions of animals and those of humans |
| C．prove that animals could sense more than humans |
| D．find out what exact warnings animals sent |
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科目：高中英语 来源：2010年长春外国语学校高一下学期期末考试英语卷 题型：填空题
单词拼写（共10小题；每小题1分，满分10分）
61. Yuan Longping is quite s_______ ( 满意的 )with his life.
62. Dr Yuan searched for a way to increase rice harvest without e______ (伸展，使变大)the area of the fields.
63. She spent her life c______ (参加运动)for women’s rights.
64. I love roast pork and f______ rice (炒饭)
65. You must ask for p______(允许) before taking pictures in the church.
66. She was so afraid of being laughed at by her friends that she did not c______(咨询) a doctor.
67. We missed the first few s______ (幕, 场) of the play because we were caught in the heavy rain.
68. Dinosaurs laid eggs too and e______ (存在)on the earth for more than 140 million years.
69. Swap summaries with your partner and give each other c_______(评论).
70. It is so wet there that the trees are extremely tall, some m______(测量) over 90 meters.
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