题目：
下列各组物质，在物质的分类中，前者从属于后者的一组是（ ）
A．金属、非金属
B．纯净物、混合物
C．氧化物、化合物
D．单质、化合物
答案：
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参考答案：对
下列各组物质，在物质的分类中，前者从属于后者的一组是（ ） A．金属、非金属 B
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