分配系数片KA＜1表示萃余相中A组分的浓度＜萃取相中A组分的浓度。
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Do you know when we will have the new year party?
A. No problem
B. Yes, it is.
C. In the classroom
D. Tomorrow evening
How will you celebrate your first summer holiday in China?
A. It is in spring
B. We often throw a party
C. That's a good idea.
D. I'll go traveling
Why not join us for an exciting evening?
A. I'll be glad to.
B. You are welome
C. Don't mention it.
D. Hurry up.
When do you celebrate Christmas in Australia?
A. The same to you.
B. In summer time.
C. We also have big dinners.
D. Oh， everybody likes it.
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