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问题 选择题

What would you like to eat?

[ ]

A. Some milk.

B. Some fish, please.

C. No, thanks.

答案

答案：B

单项选择题

An energy analyst forecasts that the price per barrel of crude oil five years from now will range between $ 75 and $105. Assuming a continuous uniform distribution, the probability that the price will be less than $ 80 five years from now is closest to:（）

A. 5.6%.

B. 16.7%.

C. 44.4%.
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单项选择题

不易发生漏液现象，有较好的操作弹性，即当气、液负荷有较大的波动时，仍能维持几乎恒定板效率的板式塔为（）。

A．筛板塔

B．泡罩塔

C．浮阀塔

D．方形喷射塔
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