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问题 解答题
计算：(
1
2
)-1-2tan30°+(1-
2
)0+
12
．
答案

(

1
2
)-1-2tan30°+(1-
2
)0+
12

=2-

2
3
3
+1+2
3

=3+

4
3
3
．

填空题

若a、b互为相反数，则a+b=______，若a、b互为倒数，则ab=______．
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单项选择题

On a direct format statement of cash flows prepared under U. S, generally accepted accounting principles (U. S. GAAP), which of the following is most likely a line item in the financing cash flow section（）

A. Interest paid.

B. Cash dividends received.

C. Cash dividends paid to shareholders.
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