题目

胶体和其它分散系的本质区别是                                                                                                                                   A.分散质粒子的大小　　　          　B.是不是一种稳定的体系                                                                                                                               C.会不会产生丁达尔效应　　        　D.粒子不没有带电荷                                                                                                                                   答案：A

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