听力原文:M: Our team won yesterday's football game.
W: Oh, you're excited, are you?
Q: What does the woman mean?
(5)
A. The team played football yesterday.
B. The team had better play once again.
C. The man was excited.
D. The man's team is improving.
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对单相接地故障,当接地电流大于5A时,电动机应装设有选择性的单相接地保护。()
A. 正确
B. 错误
单相接地电流为10A及以上时,电动机保护装置动作于跳闸。()
A. 正确
B. 错误
In the sentence "They learn how to interact with their parents, friends, and other people
A. react
B. study from each other
C. act on each other
D. learn from
装有管型避雷器的线路,保护装置的动作时间不应大于0.04s;保护装置启动元件的返回时间不应小于0.02s。()
A. 正确
B. 错误