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A high negative ion count is likely to be found

单选题

2022-01-21 15:59

A、near a pond with a water pump.
B、close to a slow-flowing river.
C、high in some barren mountains.
D、by a rotating water sprinkler.

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试题解析

解析：第三段第二句话指出，产生大量负离子的自然条件是靠近大海、瀑布或喷泉的地方，或任何有喷水或形成水花的地方。因此答案为D“在旋转的喷雾器旁”。

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