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  3. What effect does excessive positive ionization have on some people? People should be able to come to a decision about ions in t

What effect does excessive positive ionization have on some people? People should be able to come to a decision about ions in t

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问题 What effect does excessive positive ionization have on some people?
People should be able to come to a decision about ions in the air if they ______.
选项 A、note their own reactions
B、move to a healthier area
C、observe domestic animals
D、watch how wealthy people behave
答案A
解析 事实细节题。根据文章倒数第二句，人们可以通过观察负离子富含或缺乏对自己的影响作决定，即观察自己的反应，所以选A。第三题中提到人们观察动物是为了预报灾难，不用来决定负离子数量是否合适，排除C；B、D文中未提及。选D的同学可能误解了a negative rich or poor environment这个表达中 rich和poor的含义，他们的意思是“富含或缺乏(负离子)”。
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大学英语四级

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