题目内容

胶体动力学性质包括渗透,扩散,沉降平衡。

A. 对
B. 错

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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

——What shall we do first, Dad?——Let's clean room first and then.

A. our; your
B. our; yours
C. we; your
D. we; yours