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【判断题】
对于三相异步电动机绕组短路故障，如能明显看出短路点，可用竹楔插入两个线圈之间，把短路部分分开，垫上绝缘。 ( )A.
正确
B.
错误
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【简答题】A subway is not just an important form of transport. It is also a window for other people to learn about local cultures. Beijing, China The Beijing Subway was opened in 1969 and is the oldest subway s...
【单选题】_____ for the young man to spit in the subway!
A.
How bad manners it is
B.
How bad manners they are
C.
What bad manners they are
D.
What bad manners it is
E.
What an interesting
【单选题】Why is not necessary for the man to take a taxi to the hotel?
A.
Because there is an excellent bus service.
B.
Because there is an excellent railway service.
C.
Because there is an excellent subway service.
【单选题】If you don't like a double-decker, the subway, which runs 24 hours day, is alternative for you. [ ]
A.
the ; a
B.
a ; an
C.
/ ; the
D.
/ ; a
【简答题】电路是由 、 、 和导线构成。
【简答题】电路通常是由( )、( )和( )及导线构成的。
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