题目内容

The enrollment of international students will have a positive impact on America rather than threaten its competitiveness.

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Since the mid-1970s, the enrollment of overseas students has increased at an annual rate of 3.9 percent.

平均指标的意义与作用以及应用平均指标需注意的问题。

时期指标和时点指标的特点各是什么?

标志变异系数 名词解释

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