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    【题目】人类生产、生活与溶液关系十分密切，下列说法正确的是（ ）

    A．一种溶液中只能含一种溶质

    B．凡是无色、透明的液体都是溶液

    C．室温下的一瓶食盐水，其底部密度大于上部

    D．溶液一定是均一、稳定的混合物

    【答案】D

    【解析】一种溶液中可以含有多种溶质，A错误；蒸馏水是无色、透明的液体，但不是溶液，B错误；溶液是一种稳定、均一的混合物，各部分密度是一样的，C错误，D正确．

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