根据句意，用括号内所给单词的适当形式填空。

1. She bought a ________(bath) suit last Sunday.

2. I like doing some ________(shop) at weekends.

3. She hasn’t ________(feed) the cat yet.

4. There are about ten ________(well) in that village.

5. Has the camera been________(pack) yet?

下列控制方案中适于交流机车调速的是（）。

A.转差频率控制

B.矢量控制技术

C.直接力矩控制

D.变极调速控制