单词拼写。

1. The ship is sailing through the Panama C____.

2. The flood d____ a lot of houses and many people became homeless.

3. He was lucky enough to be r____ from drowning.

4. After e____ was cut off, the lights went out.

5. Trees along the road provide s____ from the sun for the farmers.

6. The bridge was badly d____ by the flood.

7. The boiling kettle was giving off s____.

8. The workers are d____ a well in the desert.

9. It's an h____ for me to be invited to speak here.

10. France lies in E____, neighbouring Germany.

度量力偶转动效应的三要素是（）

A.矩心

B.力偶在平面内的位置

C.力偶矩的大小

D.力偶的转向

E.力偶的作用平面