主变、高变装设通风保护的目的是什么？
参考答案：
防止主变、高变在大负荷运行时超温。
Isn’t it time you got down to ___ the papers?
A．mark
B．be marked
C．being marked
D．marking
根据句意及首字母提示完成句子。
1. I'm going s________for this vacation.
2. I like the w________in Kunming. It's neither too hot nor too cold.
3. Who e________wants to go sightseeing except Peter?
4. You should go out for a walk to r________yourself.
