下列物质中，属于纯净物的是A．纯净水B．硬水C．井水D．自来水

下列物质中，属于纯净物的是

A．纯净水

B．硬水

C．井水

D．自来水

答案

A解析:
略

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下列物质中，属于纯净物的是A．纯净水B．硬水C．井水D．自来水

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