题目内容
51 But still there is a danger that grows every year. Airliners get larger. Some airplanes can hold over 300 passengers. And the air itself becomes more and more crowded. If one giant airliner crashed into another in mid-air, 600 lives could be lost.
52 . Air traffic controllers tell the pilot exactly when to turn, when to climb, and when to come down. The air traffic controllers around a busy airport like London-Heathrow may handle 25000 planes a day. Not all of them actually land at the airport. Any plane that flies near the airport comes under the orders of the controllers there. 53 .
Recently such a disaster almost happened. 54 . One, with 69 passengers, had come from Toronto, and the other, with 176 passengers, from Chicago. An air traffic controller noticed on his radar screen that the two planes were too close to each other. He ordered one to turn to the right and to climb. But he made a mistake. He ordered the wrong plane to do this. Fifteen seconds later it flew directly in front of the second plane. They avoided each other by the smallest part of a second. The distance between them was less than that of a large swimming pool. 55 .
A． Even a small mistake on their part could cause a disaster.
B． Two large jets were flying towards the airport.
C． Nowadays people like traveling more by air than by car.
D．Today, air travel is far safer than driving a car in a bus motor-way.
E． This is an example of the danger that grows every year.
F． In a word, air travel is more dangerous, we should choose others.
G．From the moment an airliner takes off to the moment it lands, every moment is watched on radar scree.
51. D。首先提出现在坐飞机比开车旅行安全，然后又转折，说坐飞机的危险依然在不断增长。
52. G。飞机从起飞到降落，都在雷达上被监控。后文继续写空中控制的重要性。
53. A。继续写监控的重要性，每个小的失误都会导致灾难的发生。
54. B。列举例子，两架飞机要在一个机场降落。
55. E。上面整个段落都是日益增长的风险的一个例子。
Napoleon Bonaparte died on May 5, 1821, on the island of St. Helena off the coast of Africa. He was 51 years old at the time. When doctors examined Napoleon’s body, they said that the former emperor of France had died from cancer of the stomach. That was the cause of death recorded in the official report. However, other doctors disagreed. One doctor who was present during the examination of the body said that Napoleon died of hepatitis. Other historians and medical experts have suggested that Napoleon died of syphilis, tuberculosis, or perhaps malaria. Now, after careful research, a British chemist thinks that Napoleon might have been poisoned -- not by a person, but by his wallpaper.
Napoleon was sent to the island of St. Helena in 1815 after he lost the battle of Waterloo. He was a prisoner on the island. Although he had servants to attend to him, he had to live in one small building. St. Helena is a very wet island, so the walls of the building were always covered with mold. Napoleon became ill from spending too much time inside his house. Almost constantly he had a fever, chills, and felt sick to his stomach. He often felt pain in his shoulders and in his side. His skin turned yellow. He got frequent headaches, and he would become dizzy and vomit(吐). None of the medicine that the doctors gave Napoleon seemed to help. They were not sure what was the matter. Finally, Napoleon was too weak to leave the house. One night, while he was sleeping, he went into a coma and died.
Many doctors who later reviewed the reports of Napoleon’s illness found that the symptoms(症状) did not show a man who suffered from stomach cancer. It seemed obvious that Napoleon had died from some other cause. In 1961, a Swedish doctor examined some of Napoleon’s hair and found a high level of arsenic, a chemical poison. Was Napoleon murdered? It is doubtful. Arsenic was used in many types of medicine during Napoleon’s time, so he might have taken the arsenic as a cure for his illness. Then, in 1982, Dr. David Jones from England began to look into the mystery and suggested that Napoleon might have breathed in arsenic which was in the air of his house. In the 1700s and 1800s, arsenic was used to make a kind of green paint used on cloth and wallpaper. If the paint was used on a wet wall, the arsenic would go into the air. A person in the room might breathe that air. After studying the wallpaper in the room where Napoleon died, Dr. Jones found high levels of arsenic in the green paint on the walls.
【小题1】Why did Napoleon live on St. Helena?
| A．He owned the island. | B．He was a prisoner there. |
| C．His family lived there. | D．He liked the island. |
| A．cancer | B．a coma | C． mold | D．poison |
A. chills B. fever C dizziness D. bleeding
【小题4】According to Dr. Jones, how did the arsenic probably get into Napoleon’s body?
| A．He drank it.. | B．He touched it. | C．He breathed it in. | D．He ate it |
| A．a British doctor thinks he has found the cause of Napoleon’s death |
| B．many doctors have tried to guess the cause of Napoleon's death |
| C．Napoleon could have died from poison |
| D．all of the above |
TUVALU, a tiny country in the Pacific Ocean, has asked for help as it fears it will be swallowed up by the sea.Storms and huge waves are a constant threat and none of Tuvalu’s nine little islands is more than five meters above sea level, Salt water is already entering the country’s drinking water supply, as well as damaging plants that produce fruit and vegetable.__51___
___52___. Venice, a historic city in Italy best known for its canals, has sunk about 24 cm over the past 100 years. Experts say that it will have sunk another 20-50cm by 2050. A century ago, St. Mark’s Square, the lowest point in the city, floodedd about nine times a year, Nowadays, it happens more than 100 times. While Venice is slowly sinking into the mud on which it stands, Tuvalu’s rising sea level is caused by global warming.
The average global temperature has increased by almost 0.5 centigrade degrees over the past century; scientists expect it to rise by extra 1-3 degrees over the next 100 years.
Warmer weather makes glaciersmelt, adding more water to the ocean. The warmer temperatures also make water expand, so it takes up more space, causing the sea level to rise. The sea level has risen about 10－25 cm in the last 100 years.
___53___. Through burning coal, oil and gas, people have been increasing the greenhouse gases in the atmosphere, such as CO2. This adds to the power of the greenhouse effect, making the planet even warmer.
Many scientists believe that, if the warming is not stopped, there will be huge climate changes.___54____.____55____, the sea will swallow up millions of homes and the world will be flooded with “climate refugees” looking for somewhere to live.
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A．The main cause of global warming is human pollution |
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B．Should this come true |
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C．Without urgent help, the country’s days are numbered. |
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D．But Tuvalu is not the first place to face sinking into the sea |
E. The sea level could rise by one meter this century.
F. people face a lot of pollution.
G. much has been done about our planet .