问题 判断题

不论政府采取何种形式的价格管制,总是导致社会福利的无谓净损失(dead weight loss)。

答案

参考答案:

解析:

如图3,假设没有价格管制时,价格为P1,此时,消费者剩余相当于三角形AP1 E的面积,生产者剩余相当于三角形BEP1的面积,两者之和为三角形ABE的面积;假设政府实施最低限价,最低价格为P2,此时消费者剩余缩减为三角形AP2D的面积,生产者剩余扩大为四边形P2BCD的面积,两者之和为四边形ABCD的面积。很明显,阴影部分成了社会福利净损失。

如果政府实施最高限价,阴影部分也成了社会福利净损失,读者可以自行分析。

单项选择题

Personality is to a large extent inherent. A-type parents usually (1) A-type offspring. But the environment must also have a profound effect (2) if competition is important to the parents, it is (3) to become a major factor in the lives of their children.

One place where children (4) A characteristics is school, which is, (5) its very nature, a highly competitive institution. Too many schools (6) the "win at all costs" moral standard and measure their success by sporting achievements. The current (7) for making children compete against their classmates or against the (8) produces a two-layer system, in which competitive A types seem in some way better than their B type fellows. Being too (9) to win can have dangerous consequences: remember that Pheidippides, the first marathon runner, (10) dead seconds after saying. "Rejoice, we conquer!"

(11) the worst form of competition in schools is the disproportionate emphasis on examinations. There is, for example, a (12) school that allows pupils to concentrate on those things they do well. The (13) of competition by examination are somewhat questionable, but competition in the certain (14) of failure is positively harmful.

(15) , it is neither practical nor desirable that all A youngsters change into B’s. The world needs types, and schools have an important duty to try to (16) a child’s personality to his possible future employment. It is top management.

If the preoccupation of schools with academic work was (17) , more time might be spent teaching children surer values. Perhaps selection (18) the caring professions, especially medicine, could be made less by good grades in chemistry and more by such (19) as sensitivity and sympathy. It is surely a mistake to choose our doctors exclusively from A type stock. B’s are important and should be (20) .

12()

A.responsible

B.reliable

C.scarce

D.rare

填空题 案例分析题