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问题 单项选择题

心脏指数（CI）是指（）。

A.以单位体积计算心输出量

B.以单位体表面积计算心输出量

C.以单位体积计算回心血量

D.以上都不对

E.以单位体表面积计算回心血量

答案

参考答案：B

单项选择题

Man: Just think I went through so much work on my paper only to get a Ｃ.Woman: Well, I don't think grades are everything. What you've learned in the process will prove useful in your future work.Question: What does the woman imply

A．The man should work harder to improve his grades.

B．The man will benefit from the effort he's put in.

C．It serves the man right to get a poor grade.

D．It was unfair of the teacher to give the man a Ｃ.
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单项选择题

建筑材料的燃烧性能，是指其燃烧或遇火时所发生的一切物理和（或）（化学）变化，它是评价材料（）的一项重要指标。

A、物理性能

B、化学性能

C、承重性能

D、防火性能
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