向质量比为1：1的铁和氧化铜的混合粉末中加入一定量的稀盐酸，充

向质量比为1：1的铁和氧化铜的混合粉末中加入一定量的稀盐酸，充分反应后烧杯中还有固体物质存在，且该固体只有一种成分，则该固体是（）

A．Fe

B．FeO

C．Cu

D．CuO

答案

解析:略

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