用给出单词的正确形式填空。

1. What is your first ______ (impress) of Miss Lin?

2. Bad ______ (luck) ! She was badly hurt in the accident.

3. Fire and water may be good ______ (servant), but bad masters.

4.I’m ______ (pleasure) to tell you that you've got the job.

5. To see is ______ (believe).

促进局部血液循环的是（）

A.1～10Hz

B.50Hz

C.100Hz

D.50～100Hz

E.150～200Hz