选择合适的词组完成对话。

A. I don’t

B. play volleyball

C. Good idea

D. I do

E. skating

F. play the piano

1. -Let's go_______________.

    -______________.

2. -Do you play the violin?

    -No, ______________. I______________.

3. -Let's go and______________.

    -Great! Let's go.

4. -Do you like the colour?

    -Yes, ______________.

硫酸钡属细晶形沉淀，过滤时应选用慢速定量过滤纸过滤。