用所给单词的适当形式填空

1.I don't know how learning in schools  ____  (differ) from learning in everyday life.

2. You should know sleeping in class is _____    (forbid).

3. The problem has been _____   (bother) me for weeks.

4. Ordinary people wouht then be able to use them to ____ (obtain) valuable information.

5. All the high managers should _____ (retire) at 55.

6. He raised an____  (object) to what I proposed.

7. We are working on the ____ (assume) that we can carry out the plan in a week.

8. After he ____  (retire) from politics, he settled in the countryside.

9. That's____   (mere) a dream.

10. The noise from the construction site at deep night is very ____(disturb). We've decided to

      do something against it.

常用电力系统发生三相短路时产生的（）来校验电气设备和载流导体的动稳定度。

A、短路次暂态电流

B、短路冲击电流

C、短路电流周期分量有效值

D、短路全电流