题目：水飞后的朱砂为朱红色极细粉末，体轻，以手指撮之无粒状物，以磁铁吸之，仍有铁末。
A、正确
B、错误
标准答案：B
题目：水飞后的朱砂为朱红色极细粉末，体轻，以手指撮之无粒状物，以磁铁吸之，仍有铁末。
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