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问题:

下列对实验现象的描述正确的是 A.铜片放入盐酸中有气泡产生 B.在硬水中滴入肥皂水会产生浮

下列对实验现象的描述正确的是

A.铜片放入盐酸中有气泡产生

B.在硬水中滴入肥皂水会产生浮渣

C.铁在空气中燃烧火星四射

D.紫色石蕊试液使盐酸变红


  参考答案

正确答案:B

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