题目

分散质粒子的大小介于1100nm之间的分散系是( )A.溶液 B.胶体 C.悬浊液 D.乳浊液 答案：【答案】B【解析】在分散体系中，根据分散质粒子的大小可分为溶液、胶体和浊液，分散质粒子小于1nm的分散系为溶液、介于1100nm之间的分散系为胶体、大于100nm的分散系为浊液，所以选B，故答案为：B。— How did he finish he work?—I heard that he did it _________.A. of himself B. on the ownC. of his own D. by himself