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【单选题】
具有二次谐波制动的差动保护,为了可靠躲过励磁涌流,可A.
增大“差动速断”动作电流的整定值
B.
适当减小差动保护的二次谐波制动比
C.
适当增大差动保护的二次谐波制动比
D.
0
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举一反三
【单选题】The American movies are popular because _________
A.
they are well—made and the stories are interesting
B.
the characters in the movies are free to do whatever they like
C.
the heroes have to cope with many problems and frustrations
D.
good guys in the movies always win in the end
【单选题】It’s a long stor, but there are new words in it. ______ it will be easy for children.
A.
or
B.
So
C.
But
【简答题】汽车天窗按动力形式可分为手动式和
【简答题】The best place for ___ ___ of money is a bank. ( stor e )
【单选题】Shelley's masterpiece,. Prometheus Unbound, is a verse drama, which borrows the basic story from ______.
A.
the Bible.
B.
a German legend.
C.
a Greek play.
D.
One Thousand and One Nights.
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