由于平均固定成本的作用，使得AC曲线最低点的出现( )AVC曲线的最低点。
A．快于、低于
B．慢于、高于
C．慢于、低于
D．快于、高于
参考答案：B
根据句意和首字母提示填入所缺单词。
1. Mr Wang teaches us b_____ at school.
2. Our teacher is very s_____ with us.
3. I'm really b_____ today.
4. —What's your mother's favorite d_____?
—It's Sunday.
5. S_____ is the last day of a week.
6. He is r_____ busy today.
7. T_____is the fifth day of a week.
8. W_____ is after Tuesday.
9. We are t_____ after four classes.
10. Are there a_____ pictures on the wall?
凝结水
