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问题 单项选择题

水轮发电机在失磁情况下（）继续运行。

A.可以

B.不可以

C.不确定是否可以

D.其他三个选项都不是

答案

参考答案：B

单项选择题

符合氮氧化物急性中毒的临床表现应是（）

A.剧烈咳嗽、咳痰

B.眼结膜充血、红肿

C.大量流鼻涕、打喷嚏

D.畏光、大量流眼泪

E.无明显眼和上呼吸道刺激症状
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单项选择题

Depths in the routes (Malacca and Singapore Straits) vary between 20m and about 23m but there are many areas of sand waves and depths are liable to change. The statement infers that（）.

A.depths in Malacca and Singapore Straits are stable

B.depths in Malacca and Singapore Straits are changeable

C.depths in Malacca and Singapore Straits are invariable

D.depths in Malacca and Singapore Straits are the same all the time
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