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外语
What effect does excessive positive ions have on some people? A high negative inn count is likely to be found ______.
What effect does excessive positive ions have on some people? A high negative inn count is likely to be found ______.
admin
2009-04-23
33
问题
What effect does excessive positive ions have on some people?
A high negative inn count is likely to be found ______.
选项
A、near a pond with a water pump
B、close to a slow-flowing river
C、high in some barren mountains
D、by a rotation water sprinkler
答案
D
解析
文章第三段第二句谈到负离子多的地方是离水近的地方,比如海边,瀑布和喷泉边,以及有水花喷溅或有喷雾形成的地方。由此可以推断水流速度快容易产生负离子,所以选D,同时也可排除其他选项。
转载请注明原文地址:https://kaotiyun.com/show/ujC7777K
0
大学英语四级
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