电力系统暂态稳定是指电力系统受到大干扰后，（），最终达到新的

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问题单项选择题

电力系统暂态稳定是指电力系统受到大干扰后，（），最终达到新的或恢复到原来的稳定运行方式的能力。

A.不发生自发振荡和非同期失步

B.各同步电机保持同步运行

C.各同步电机失步后较快恢复同步

D.进入稳定的失步运行

答案

参考答案：B

句型转换

Change the sentences.

1. It took the Clarks two hours to clean their kitchen last Saturday.

The Clarks __________ two hours __________ their house last Saturday.

2. When I read love stories, I feel moved.

Reading love stories often __________ me __________.

3. When does the train leave? I want to know. (Put the two sentences together.)

I want to know __________ the train __________.

判断题

电视真人秀节目的“真”是指真实的人在真实的情境下的真实行为。