接触器由（）、辅助触点及基座等几部分组成。

A.电磁机构

B.触点系统

C.灭弧系统

D.释放弹簧机构

根据句意及汉语的提示,补全单词.

1. He is _____ (高的) of the two boys.

2. Which desert is_____ (大的) in the world?

3. Things have gone from bad to _____ (更差).

4. The trees can prevent the wind from _____ (刮) the earth away.

5.  He jumped twice as _____ (高) as his friend.