过电流保护近后备灵敏度校验时其校验条件需要考虑:( )。
A. 两相短路
B. 最小运行方式
C. 本线路末端故障
D. 以上都是
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过电流保护远后备灵敏度校验时其校验条件需要考虑:( )。
A. 两相短路
B. 最小运行方式
C. 相邻线路末端故障
D. 以上都是
电网终端的保护,过电流保护动作时限并不长,可以作为主保护兼后备保护。( )
A. 对
B. 错
How does Little Brad comfort his mother？
A. He says that they can overcome the difficulties.
B. He says that they can find a different way.
What does Little Brad want to say to his Dad？
A. He makes those weird actions willfully.
B. He make those weird actions unintentionally.
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