问答题

The American economic system is organized around a basically private-enterprise, market oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make profits, produce these goods and services in competition. with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services axe produced. Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen m maximize profits and the desire of individuals to maximize their incomes, that together determine what shall be produced and how resources are used to produce it.

【参考答案】

美国的经济体系围绕一种以私人企业为主体、以市场为导向的经济形式构成。在这种体系中，消费者以在市场上购买他们最想获得的商品......

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单项选择题

The kiwi is very difficult to find during the daylight hours because ______.

A．it stays out of sight and sleeps during the day
B．it usually goes from place to place during the day
C．it changes the colour of its feather in the daytime
D．it is caught and eaten by its enemy in the daytime

问答题

Directions: Write a summary of the following passage in no less than 80 words. Your summary should contain the main ideas of the original passage and be clearly written down on the AN SWER SHEET. In addition to food and shelter, man has a third basic need. This is clothing. Modern man wears clothing for three purposes: for protection, for decoration, and for modesty. It is thought that prehistoric man wore clothing for a fourth reason, as a kind of magic. For example, he may have worn the skins of animals either to celebrate his victories over them, or perhaps to gain strength and wisdom from the animals he had killed. Until fairly recently it was possible to use only natural materials of various kinds for the making of clothing. Both plants and animals supply these natural materials. From plants we get cotton and linen. From animals we get such materials as wool, silk, leather and furs. Wool was one of the first fibers to be used for cloth, and for a long time it was the most common textile fiber in Europe. The fiber which we call wool comes mainly from sheep, but the hair of a few other animals is also used for cloth. Cotton has been used for over three thousand years, especially in warm countries. Cotton material was not known in Europe until much later. Material made from the cotton plant can be very soft, cool and comfortable. The finest cotton materials were very expensive at one time, and only the rich people could buy them. Two other fibers, linen and silk, have also been used extensively in the making of clothing. In addition to the natural materials from plants and animals, modern man now has cloth which is made synthetically. In the twentieth century, man has learned to create completely synthetic fibers. These are made from coal, glass, petroleum, milk and wood. Nylon, dacron and orlon are the names of a few of these synthetic fibers. Recent synthetic products include disposable paper clothing and artificial leather. In many ways synthetic fibers are much better than natural fibers. It is possible to create specific fibers to be used for specific purposes. Of all the fibers now used by man, a very large percentage is man-made.