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【判断题】
三相电源瞬时值的和不为零。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.
A.
was coming
B.
had come
C.
comes
D.
would come
【简答题】Two people sit down to play Go（围棋）. One of the players is an old man. He is now 89 years old. He has spent all of his life playing this . The other person is a young woman. She has been playing Go...
【简答题】直接渠道也是。
【单选题】A cosmologist differs from a cosmogonist in that ______.
A.
he sounds a bit old-fashioned
B.
he learns from Edgar Allen Poe
C.
he studies the origin of the whole Universe
D.
he tries to explain how the Solar System formed
【单选题】Li Ming fell ______ others in English study, but he tried his best to catch up ______ them.
A.
behind, on
B.
down, with
C.
behind, with
【单选题】融资融券业务试点期间,券商可以将以下证券融给客户( )
A.
券商自有的证券
B.
券商自有的证券和基金公司提供的证券
C.
券商自有的证券和金融公司提供的证券
D.
以上都可以
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