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Large modern cities are too big to control. They impose their own living conditions on the people who inhabit them. City-dwellers are obliged by their environment to adopt a wholly unnatural way of life. They lose touch with the land and rhythm of nature. It is possible to live such an air-conditioned existence in a large city that you are barely conscious of the seasons. A few flowers in a public park (if you have time to visit it) may remind you that it is spring or summer. A few leaves clinging to the pavement may remind you that it is autumn. Beyond that, what is going on in nature seems totally irrelevant. All the simple, good things of life like sunshine and fresh air are at a premium(珍贵). Tall buildings blot out the sun. Traffic fumes pollute the atmosphere.Even the distinction between day and night is lost. The flow of traffic goes on unceasingly and the noise never stops. What are highly esteemed in big cities()

A. Living conditions.
B. Sunshine and fresh air.
C. Air-conditioned houses.
D. A few flowers and a few leaves.

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Each day every person in the United States throws away more than five pounds of garbage(垃圾). There is more garbage now than ever before and most of it is made up of the packages and cans in which we put our food. The traditional way of getting rid of solid wastes is quickly becoming inadequate. Many cities are experimenting with newer ways of handling their growing piles of garbage.One of these new ways is "recycling"(回收使用). Through recycling usable materials are taken out of garbage and made into something else. These usable parts of garbage are put through the cycle of going from a raw material to a finished product again.In some cities a machine called Hydrapulper is being used to help recycle garbage. A Hydrapulper is like a huge mixing machine. The garbage is dropped onto a conveyor belt (传送带) that feeds the machine. At the same time, water is pumped into the Hydrapulper. With a mixing action, the Hydrapulper throws out the heavy metal objects that can later be sold as waste metal. The rest of the garbage—paper, food, plastic, rubber, glass, wood, leaves, and other items—falls apart. The waste is then mixed with water and carried to another piece of equipment where glass, sand and small pieces of metal are thrown out.With the Hydrapulper, up to 95 percent of the original garbage is made again useful. The rest turns into furnace ash(炉灰). What is the main purpose of this passage()

A. To describe an experiment in which a Hydrapulper is used.
B. To introduce Hydrapulper, a new type of garbage disposer.
C. To tell what the writer thinks of the recycling of garbage.
D. To explain why garbage should be recycled in a new way.

30岁,女性,既往月经规律,因精神分裂症长期服用奋乃静等药物,出现停经7个月伴泌乳,妊娠试验阴性,该患者应诊断为

A. 继发性闭经
B. 子宫性闭经
C. 卵巢性闭经
D. 垂体性闭经
E. 下丘脑性闭经

吉兰-巴雷综合征的最主要危险是

A. 延髓麻痹
B. 呼吸肌麻痹
C. 视盘水肿
D. 肺部感染
E. 心力衰竭

Lawyers are regarded as Darth Vaders of the New Age in America. America has become overpopulated with lawyers—the legal profession has transformed the American system into a government of the lawyers, by the lawyers and for the lawyers. This has led to an explosion of litigation(诉讼), which has burdened the paying public with billions in legal bills. These are paid by all the people in the form of higher costs, higher prices and lower productivity.As a group, lawyers are one of the most reactionary forces in American society. In an age when we need cooperation and self-responsibility, they promote conflict and blame. Where we need unity, they promote division. Where we need honest communications, they practice the art of distortion in an effort to win legal games.A recent study reported in the San Francisco Chronicle found lawyers bad for the economy. They are obviously bad for the total society; they have been called America’s own home grown terrorists due to their explosive, random, and negative impact on the nation. It has been suggested that nothing would benefit the society more than a five year moratorium(延期偿付) on all civil litigation and locking down the law schools until the next century. Of course, this will never happen. Lawyers are powerful figures in the Receding Age and they will not readily surrender their privileged positions.Given the negative impact of lawyers on society in general, it is not surprising that they have had a very negative impact upon the employee-employer relationship as well. The number of so-called "wrongful discharge" cases has increased dramatically as lawyers have found a new area to exploit. Some employees now spend more time documenting their cases against their employers for future litigation than they do performing their duties. Which of the following is NOT the result of excessive lawyers in America()

A. Higher costs.
B. Higher prices.
C. Lower productivity.
D. Lower crime rat

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