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[单选题]
22.4 In the fourth paragraph, “regurgitate” probably means____.
A
passing food to someone
B
storing food
C
bringing food back up from one’s stomach
D
searching for food
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试题答案：
C
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3. Friction is a force which opposes motion. Much of the energy supplied to a complicated machine with many moving parts is wasted in overcoming this opposition. The energy is converted into useless heat. The amount thus lost can be considerably reduced and the life of the machine prolonged by careful lubrication. This reduction improves the efficiency of the machine. Another way in which friction is reduced is to substitute roller or ball bearings for the earlier type of bearing, in which the surfaces in contact move by sliding. Bearings of these later types are used very extensively in many kinds of modern machinery.It must not be assumed, however, that friction is always a disadvantage. In many instances it is highly important. Belts are often used in conveying power from one machine to another. In the absence of friction, this could not be done. The driving wheel would not run the belt, neither would the belt run the wheel to driver. Without friction, then, belted machinery could not be used. Again in the case of all motor vehicles, friction is essential in the operation of the brake. Were there no friction, there could be no brake. But even this illustration does not give an adequate picture of the importance of friction. The vehicle could not even be started if it were not for the friction exerted between the tires and the road. Nails hold in wood, and screws hold in either wood or metal by reason of friction, without which they would be useless. Walking is difficult enough on an icy pavement, but it would be wholly impossible if there were no friction at all between the shoe and the pavement.(5分)3.1 Friction arises when____.(1分)A. an opposing force of motion exists B. the energy is wastedC. everything is motionlessD. a complicated machine is supplied with energy
The fact____ shows that he was never really serious about coming.
22.2What may be the reason for a foreign student to choose to live in a dorm?(2分)
2.A railroad was being built all the way down the east coast off Florida, from Jacksonville to Miami and Negro workers were employed because they were cheap. A great many of them were in Daytona. Most of them had children. They were living in shacks worse than those in The Terry in Augusta. The children were running wild in the streets. Mary Bethune seemed to hear a voice say, "What is the place? Build your school there."Her husband, Albertus, wasn't so sure about her school. He thought Palatka was a pretty good place for them to live. Mary listened but she never gave up her idea. She knew that if she went to Daytona, Albertus would come too.One day she begged a ride for herself and her little boy with a family that was going to Daytona. It was only seventy miles away. But in 1904 the sand was deep on Florida roads. Practically no one had an automobile -- certainly not the poor family that gave Mary and little Albert a ride. So it was three dusty days after they left Palatka before they reached Daytona. There Mary hunted up the only person she knew, and she and little Albert stayed with this friend for a few days.As she had done in The Terry in Augusta, Mary walked up and down the poor streets of Daytona. She was looking for two things -- a building for the school she was determined to start and some pupils for that school.After a day or two, she found an empty shack on Oak Street. She thought this would do. The owner said she could rent it for $11.00 a month. But it wasn't worth that much. The paint had peeled off, the front steps wobbled so that she had to hang onto the shaky railing to keep from falling, the house was dirty, it had a leaky roof. In most of the windows the panes of glass were broken or cracked.Eleven dollars a month ! Mary said she only had Times="10".50. She promised to pay the rent as soon as she could earn the money. The owner trusted her. By the time she was sure she could have the building, she had five little girls from the neighborhood as her pupils.What a school! A rickety old house and five little girls! The little girls pitched in and cleaned the house. The neighbors helped with scrubbing brushes, brooms, hammers, nails, and saws. Soon the cottage could be lived in, but there were no chairs, no tables, no beds. There was no stove. However, there were no pots and pans to cook in, even if there had been a stove.Mary set about changing these things. She found things in trash piles and the city dump. Nobody but Mary would have thought of making tables and chairs and desks from the old crates she picked up and brought home. Behind the hotels on the beach she found cracked dishes, old lamps, even some old clothes. She took them home too. Everything was scoured and mended and used. "Keep things clean and neat" was her motto then; and as long as she lived the pupils in her school had to live up to that motto.Her little pupils had no pencils. They wrote with pieces of charcoal made from burned logs. Their ink was elderberry juice. What good was ink or a pencil if there was no paper to write on? Mary took care of that too.Every time she went to the store to get a little food, or a few pots and pans, she had each article wrapped separately. The pieces of wrapping paper were carefully removed and smoothed out. The little girls used this paper to write their lessons with their charcoal pencils.She needed a cookstove very badly but she couldn't pay for one. What should she do? Her little pupils had to have warm food.Unexpectedly, the problem was solved for her. One day a wrinkled old white neighbor said to her, "Can you read?"Mary said, "Yes.""Then will you read me this letter from my son? I can't find my glasses."Mary read the letter to her."Thanks," said the mother.Mary turned to go. "You're welcome."The old woman stood by her open door and thought a moment. Then she said, "I got an old cookstove and I don't need it. Would you want it?"(5分)2.1How did Mary's husband, Albertus feel about going to Daytona?____(1分)A.He was strongly in favour.B.He was quite reluctant.C. He was definitely against it.D.He was not happy about the idea.
speaking, I think spiders are indeed disgusting.(1分)
ICouldDo nothingBut____ there for the night
22. Man lives in communities. His social existence restricts his flexibility in certain directions and extends it in others. Society imposes on him some limitations. People do not all engage in the same activities. They can be differentiated from each other by the functions they perform. This process of differentiation is called specialization. Specialization prevents many members of an industrial society from developing intelligence and initiative. However, some careers in these societies demand a high degree of intelligence and initiative. And there are some aspects of human society itself which encourage the development of such powers, indeed extend them beyond a point which can be attained by animals or animal communities lacking the features which human society uniquely possesses.Western-type democracies often claim that they provide "equality of opportunity" for all their citizens. At first sight it might seem that this implies the same chance for everyone of succeeding in his preferred occupation provided he is conscious of his goal and is willing to work hard; in other words, a situation in which rewards depend only on desire and effort. What the phrase actually implies is, of course, something rather different -- namely a competitive situation in which the number of competitors exceeds the number of rewards, though all competitors have the same "chance" because they all start the race from the same base line. However, it is only in theory that they all start equal. Even if the state offers them free education and protects them from hunger or extreme poverty, many citizens are disadvantaged in practice by their background, their upbringing, and probably other factors such as their sex or color. A process of invisible or hidden selection goes on which has very little to do with "equality of opportunity" in any sense. It is not the individual who selects his job; it is the system of society with its specialized requirements which selects the individuals who fit its requirements.(10分)22.1 Specialization is necessary because____.A. man is not as capable as machines in doing some thingsB. few people can develop all-round skillsC. different social members take part in different activitiesD. more and more machines are taking the place of men
You must read it, as this is one of _______ interesting books in this field.(1分)
3.2The central idea of the first paragraph is to____.(1分)
3. A. describe B. indicate C. reflect D. produce
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