What effect does excessive positive ions have on some people?A．They think they are mad.B．They feel very tired.C．They become violently sick.D．They are too tired to do anything.

题目

What effect does excessive positive ions have on some people?

A．They think they are mad.

B．They feel very tired.

C．They become violently sick.

D．They are too tired to do anything.

参考答案和解析

正确答案：B
解析：题干中的excessive对应的是第二段首句中的a large number of“过多的，大量的”，而B中的very tired与此句中的fatigue“疲劳”相对应，所以应选B。

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What effect does excessive positive ions have on some people?A．They think they are mad.B．They feel very tired.C．They become violently sick.D．They are too tired to do anything.

题目

参考答案和解析

更多“What effect does excessive positive ions have on some people?A．They think they are mad.B．They feel very tired.C．They become violently sick.D．They are too tired to do anything.”相关问题

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