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问题 解答题
先化简，后求值：(3-
x
x+2
)(x+2)，其中x=-
3
2
．
答案

解法一：原式=3（x+2）-x （3分）

=3x+6-x（5分）

=2x+6．（6分）

当x=-

3
2
时，原式=2×（-
3
2
）+6（7分）=3．（8分）

解法二：原式=

3x+6-x
x+2
•（x+2）（5分）=2x+6 （6分）

当x=-

3
2
时，原式=2×（-
3
2
）+6（7分）=3．（8分）

单项选择题

Economist: Any country that is economically efficient will generate wealth. Such a country will remain politically stable only if that wealth is distributed equitably. The equitable distribution of wealth puts an end to risk taking, the indispensable precondition of economic efficiency.
Which of the following conclusions can be properly drawn on the basis of the statements above

A．No country can indefinitely remain both economically efficient and politically stable.

B．No country can indefinitely remain both politically unstable and wealthy.

C．Economic efficiency is the indispensable precondition for the generation of wealth in a country.

D．Any country in which wealth is distributed equitably will indefinitely remain politically stable.

E．(E) Growing economic efficiency encourages risk taking, which in turn leads to further growth in economic efficiency.
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单项选择题

我省统计制度及某市统计局文件规定，劳动工资统计季报表应在季后20日前报送市统计局。但某市电信公司某年1至3季度的报表，三次均在季后25日上报，按照新《统计法》规定，该电信公司构成了（）的统计违法行为。

A.屡次迟报统计资料

B.未按时提供统计资料

C.迟报统计资料

D.经催报后仍未按时提供统计资料
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