容积式泵包括（）等。

A．往复泵

B．水环泵

C．回转泵

D．旋涡泵

E．水锤泵

词汇。

根据句意及首字母提示补全单词。

1. I will  s____ you a postcard as a present to you on your birthday.

2. — Do you m____ my opening the window?

    — You'd better not.

3. — Will you be f____ tomorrow? I'll take you to see a film.

    — Of course.

4. Andy is very c____, and she answer the difficult question.

5. There are four s____ in a year. And I like spring best.