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    【题目】下列溶液中，溶质是液体的是（ ）

    A.医用葡萄糖溶液 B.20%的氢氧化钠溶液

    C.75%的消毒酒精 D.0.9%的生理盐水

    【答案】C

    【解析】

    试题分析：溶质可以是固体、液体、气体，溶剂只能是液体，当两种液体相互溶解时，以量多的为溶剂，量少的为溶质；如果两种液体中有水，则不论水量的多少，水都是溶剂。A.医用葡萄糖溶液是固体葡萄糖溶于水形成的，溶质是固体葡萄糖，错误；B.氢氧化钠在常温下是固体，氢氧化钠溶液中，溶质是固体氢氧化钠，故B错误；C.75%的消毒酒精是酒精溶于水水形成的，其中酒精占了75%，水占了25%，酒精是溶剂，酒精在常温下是液体，故正确；D.0.9% 的生理盐水是食盐的水溶液，食盐是溶质，食盐在常温下是固体，D错误。故选C

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