题目内容

According to the passage, U. S. leadership in public relations is being threatened because________.

A. an unparalleled increase in the number of public relations companies
B. shrinking cultural differences and new communications technologies
C. the decreasing number of multinational corporations in the U. S.
D. increased efforts of other countries in public relations

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Which of these do you think John Harding was？

An escaped prisoner.
B. A criminal on the run from the police.
C. An airman who had landed in an enemy country area.
D. A spy who had been hiding in the forest.

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收入的增加会导致()。

A. 劣等品的需求曲线右移
B. 正常品的需求曲线右移
C. 需求没有变化，因为价格将会上升，这会抵消收入增加的效应
D. 沿需求曲线的变动

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假定技术不变，且只有一种生产要素的投入量发生变化，则该种要素如果过量使用则会导致()。

A. 总产量继续增长，但增长的幅度越来越小
B. 总产量下降，但不会等于零
C. 最终使总产量下降
D. 边际产量减少直到等于零

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边际产量与总产量之间的关系是()。

A. 总产量曲线上任何一点对应的边际产量的数值就等于该点的斜率
B. 数值上等于总产量曲线上该点与原点之间的连接线的斜率
C. 数值上等于总产量除以变动投入要素的数量
D. 以上三者皆是

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According to the passage, U. S. leadership in public relations is being threatened because________.

A. an unparalleled increase in the number of public relations companies B. shrinking cultural differences and new communications technologies C. the decreasing number of multinational corporations in the U. S. D. increased efforts of other countries in public relations

Which of these do you think John Harding was？

收入的增加会导致()。

假定技术不变，且只有一种生产要素的投入量发生变化，则该种要素如果过量使用则会导致()。

边际产量与总产量之间的关系是()。

A. an unparalleled increase in the number of public relations companies
B. shrinking cultural differences and new communications technologies
C. the decreasing number of multinational corporations in the U. S.
D. increased efforts of other countries in public relations