There are two main things that make aircraft engineering difficult: the need to make every part as reliable as possible and the need to build everything as light as possible. They are to be combined (结合).The fact that an aeroplane is up in the air and can't stop, if anything goes wrong, makes it perhaps a matter of life or death that its performance is completely dependable.

Given a certain power of engine, and so a certain amount of oil, there is a practical limit to the total weight of aircraft that can be made to fly. Out of that weight as much as possible is wanted for fuel radio instruments, passenger seats, or freight(货物) room, and, of course, the passengers or freight themselves. So the aircraft has to be as small and light as safety will allow. The designer must work out the normal load that each part will bear. This specialist is called the "stress(压力) man." He takes notice of any unusual stress that may be put on the part as a means against errors in production, accidental damage, etc.

The stress man's decisions go to the designer of the part, and he must make it as strong as the stress man says is necessary. One or two small parts are always tested to prove that they are as strong as the designer wanted. Each separate part is tested, then a whole one-for example, a complete wing, and finally the whole aeroplane. When a new type of aeroplane is being made, normally only one of the first three made will be flown. Two will be destroyed on the ground in strict tests. The third one will be tested in the air.

When a plane has passed all the tests it can get a government permission of flight, without which it is illegal(非法的) to fly, except for test flying.

The main difficulty of aircraft design lies in________.

A. the combination of lightness and reliability      B. the speed and cheapness

C. reliability and passenger comfort             D. its engine power and oil burning

The stress man's job is to work out ________.

A. how safe the plane is                         B. the load that each part bears

C. the possible errors made by designers        D. the amount of load the aircraft may carry Which of the following statements is NOT true?

A. The total weight of an aircraft depends on the power of the engine.

B. An aircraft has to pass all the tests.

C. Permission of flight can be got from the government.

D. It is necessary for all the first planes to be tested in the air.

There are two main things that make aircraft engineering difficult: the need to make every part as reliable as possible and the need to build everything as light as possible. They are to be combined (结合).The fact that an aeroplane is up in the air and can't stop, if anything goes wrong, makes it perhaps a matter of life or death that its performance is completely dependable.

Given a certain power of engine, and so a certain amount of oil, there is a practical limit to the total weight of aircraft that can be made to fly. Out of that weight as much as possible is wanted for fuel radio instruments, passenger seats, or freight(货物) room, and, of course, the passengers or freight themselves. So the aircraft has to be as small and light as safety will allow. The designer must work out the normal load that each part will bear. This specialist is called the "stress(压力) man." He takes notice of any unusual stress that may be put on the part as a means against errors in production, accidental damage, etc.

The stress man's decisions go to the designer of the part, and he must make it as strong as the stress man says is necessary. One or two small parts are always tested to prove that they are as strong as the designer wanted. Each separate part is tested, then a whole one-for example, a complete wing, and finally the whole aeroplane. When a new type of aeroplane is being made, normally only one of the first three made will be flown. Two will be destroyed on the ground in strict tests. The third one will be tested in the air.

When a plane has passed all the tests it can get a government permission of flight, without which it is illegal(非法的) to fly, except for test flying.

5. The main difficulty of aircraft design lies in________.

A. the combination of lightness and reliability

B. the speed and cheapness

C. reliability and passenger comfort

D. its engine power and oil burning

6. The stress man's job is to work out ________.

A. how safe the plane is

B. the load that each part bears

C. the possible errors made by designers

D. the amount of load the aircraft may carry

7. Which of the following statements is NOT true?

A. The total weight of an aircraft depends on the power of the engine.

B. An aircraft has to pass all the tests.

C. Permission of flight can be got from the government.

D. It is necessary for all the first planes to be tested in the air.

文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（^），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

注意：1. 每处错误及其修改均仅限一词；

      2. 只允许修改10处，多者（从第11处起）不计分。

When a plane from London reached in Sydney airport, workers began to unload the number of wooden boxes where contained clothing. No one could know why one of the boxes were extremely heavy. It suddenly occurred to one of the workers to open the box. He was astonished at what he found. A man was laying in the box on top of a pile of woolen goods. He was very surprised at being discovered that he did not even try to run away. Before he was arrested, the man admitted hiding in the box before the plane left for London. He had had a long and uncomfortable trip, for he had stayed the wooden box for over eighteen hours. The            man was ordered to pay￡3,500 for the cost of the trip. The common price of a ticket is ￡2,000!

文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（^），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

注意：1. 每处错误及其修改均仅限一词；

      2. 只允许修改10处，多者（从第11处起）不计分。

When a plane from London reached in Sydney airport, workers began to unload the number of wooden boxes where contained clothing. No one could know why one of the boxes were extremely heavy. It suddenly occurred to one of the workers to open the box. He was astonished at what he found. A man was laying in the box on top of a pile of woolen goods. He was very surprised at being discovered that he did not even try to run away. Before he was arrested, the man admitted hiding in the box before the plane left for London. He had had a long and uncomfortable trip, for he had stayed the wooden box for over eighteen hours. The            man was ordered to pay￡3,500 for the cost of the trip. The common price of a ticket is ￡2,000!

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