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【单选题】
当双侧电源线路上装设无电压检定和同期检定的三相自动重合闸，发生永久性故障时，同期侧断路器（）切断短路电流。A.
一次
B.
二次
C.
多次
D.
零次
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举一反三
【单选题】How long have Lawrence and Maria been waiting at the airport?
A.
Half an hour.
B.
One hour
C.
More than one hour.
【简答题】C. complete the following conversation. Maria: Lawrence! Have you (1) __________? Lawrence: Yes. What’s wrong, Maria?
【简答题】ABCD四地,属于背斜构造的是___________,属于向斜构造的是__________。
【简答题】Maria: Hi, Lawrence, is there something wrong with the copy machine? Lawrence: Hi, Maria. I want to ___1___ 20 pages of this document, but when I ___2____ the machine and __3___ the __4___ for...
【单选题】Lawrence is going to meet Mike and Maria __________.
A.
at the Chinese restaurant
B.
at the company
C.
at the airport
D.
at his home
【单选题】Lawrence would like to invite Mike and Maria to _________.
A.
a concert
B.
a party
C.
a movie
D.
a dinner
【简答题】Maria: Hi Lawrence, is there something wrong with the copy machine? Lawrence: Hi, Maria. I want to copy 20 pages of this document. But when I started the machine, (1) the button for 20, only 5 pages w...
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