What effect does excessive positive ions have on some people? [br] A high negati

游客2024-03-05 35

问题 What effect does excessive positive ions have on some people? [br] 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。

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