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What effect does excessive positive ions have on some people? [br] People should
What effect does excessive positive ions have on some people? [br] People should
游客
2023-08-02
63
管理
问题
What effect does excessive positive ions have on some people? [br] 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
文章倒数第二句提到,人们可以通过观察环境对白己或他人的影响来判断负离子的富含或缺乏,所以选A。第二段末提到人们观察动物是为了预报灾难,而不是用来决定负离子数量是否合适,故排除C。B、D在文中均未提及。选D可能是误解了a negative rich or poor environment这个表达中 rich和poor的含义,它们的意思是“富含或缺乏(负离子)”,而不是“富裕或贫穷”。
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