第32题: [单项选择]A high negative ion count is likely to be found ______. 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 参考答案:D 答案解析:细节题。
[解析] 第三段第二句话作者指出,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”。