漂白粉的有效成分是 A.次氯酸钙     B.氯化钙     C.次氯酸 

漂白粉的有效成分是

A.次氯酸钙     B.氯化钙     C.次氯酸       D.次氯酸钙与氯化钙

答案

A

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