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    【题目】下列洗涤或除污过程应用乳化原理的是（ ）

    A．用汽油除去衣服上的油污

    B．用酒精除去衣服上的碘

    C．用洗洁精洗去餐具上的油脂

    D．用刷子刷除杯子上的污垢

    【答案】C

    【解析】本题考查对乳化作用的认识．A项，用汽油除去油污是利用汽油能溶解油污；B项，酒精除去碘也是利用溶解的原理；C中洗洁精除去油污是利用了乳化原理；D中用刷子除去杯子上的污垢是采用摩擦的方法将污垢除去，故只有C符合题意．

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