胶体粒子的扩散过程和布朗运动本质上都是由粒子的热运动而发生的宏观上的定向迁移现象。
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胶体动力学性质包括渗透,扩散,沉降平衡。
A. 对
B. 错
Miss Lin isEnglish teacher. We like very much.
A. we; she
B. our; she
C. we; her
D. our; her
This room is, and that one is.
A. our; their
B. ours; theirs
C. us; them
D. we; they
——Excuse me. Is this book?——No, isn't. My book is here.
A. your; this
B. you; it
C. your; it
D. you; this