Oil, there are several different types, is used for many purposes by countries all over the world. [ ] A．whichB．in which C．by whichD．of which 题目和参考答案——青夏教育精英家教网—

Coketown was a town of red brick, or of brick that would have been red if the smoke and ashes had allowed it; but in fact it was a town of unnatural red and black like the painted face of savage（野人）. It was a town of machinery and tall chimney, out of which smoke trailed themselves for ever and ever. It had a black canal in it, and a river that ran purple with ill smelling color, and large piles of building full of windows where there was a rattling and a trembling all day long, and where the steam-engine worked up and down like the head of an elephant in a state of madness. The town contained several large streets all very like one another, and many small streets still more like one another, inhabited by people equally like one another.

A sunny midsummer day. There was such a thing sometimes even in Coketown. Seen from a distance in such weather, Coketown lay covered in a smoke of its own. You only knew the town was there, because you knew there could have been no such a place upon the view without a town.

The streets were hot and dusty on the summer day, and the sun was so bright that it even shone through the smoke over Coketown, and could not be looked at steadily. Workers appeared from low underground doorways into factory yards, and sat on steps, wiping their face sand looking at coals. The whole town seemed to be frying in oil. There was a smell of hot oil everywhere. The atmosphere of those places was like the breath of hell（地狱）, and their inhabitants wasting with heat, walked lazily in the desert. But no temperature made the mad elephants more mad or more sane（理智的）. Their tiresome heads went up and down at the sane rate, in hot weather and in cold, wet weather and dry. The measured movement of their shadows of wood; while for the summer noise of insects, it could offer all the year round, from the dawn of Monday to the night of Saturday.

67. Which of the following words is NOT properly used to describe Coketown ?

A. unpleasant B. dirty C. noisy D. deserted

68. From the passage we know that Coketown was mainly a（n）_____town.

A. industrial B. agricultural C. historical D. cultural

69. Only _____ were not affected by weather.

A. the workmen B. the habitants C. the steam-engines D. the woods

70. Which is the author’s opinion of Coketown?

A. Coketown should be replaced by woods B. The town had too much oil in it

C. The town was seriously polluted D. The town’s atmosphere was unchanged

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.

The U.S.A. made a lot of excuses in an attempt to make war on Iran. However, its ____ purpose lay in the plentiful oil there.

A. incredible B. fundamental C. flexible D. identical

The USA makes a lot of excuses in an attempt to make war on Iran , however, Its __________ purpose lies in the abundant oil there.

A. logical B. fundamental C. accurate D. commonly

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.

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