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问题 单项选择题

霍乱弧菌最重要的致病物质是（）

A.菌毛

B.鞭毛

C.霍乱肠毒素

D.内毒素

E.荚膜

答案

参考答案：C

解析：霍乱肠毒素是目前已知的致泻毒素中毒性最强的毒素。

问答题 简答题

如果重整循环氢压缩机突然停运，备机也因故不能启用。氢气循环中止时，应如何处理？
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单项选择题

What was Tom supposed to do a quarter later
[A] He was supposed to go out for lunch.
[B] He was supposed to come back home.
[C] He was supposed to have a meeting.
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