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叉架类零件主要包括( ),( ),( ),( )。
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【单选题】已知某三相同步发电机空载时,励磁电流为3A,输出额定电压为400V。若现带上一定大小的感性负载,要求保持端口电压额定,则励磁电流 。
A.
增大
B.
减小
C.
保持3A
D.
或增大或减小均可,但不能不变
【单选题】— Shall we go to the cinema this evening? —Sorry I can’t. I’m __________ my mum at the airport at 7:00.
A.
carrying away
B.
sending out
C.
putting off
D.
seeing off
【单选题】—Mum, shall we have lunch? —We will have it when your dad .
A.
when ; returns
B.
where ; will return
C.
where ; returns
D.
when ; will return
【单选题】—Mum, when shall we go shopping? —After I finish _______ the clothes.
A.
wash
B.
washed
C.
to wash
D.
washing
【单选题】— Shall we go to the cinema this evening? — Sorry I can't .I'm ______ my mum at the airport at 7∶00. [      ]
A.
carrying away
B.
sending away
C.
putting off
D.
seeing off
【单选题】已知某三相同步发电机空载时,励磁电流为3A,输出额定电压为400v电压。若现带上一定大小的感性负载,要求保持端口电压额定,则励磁电流应 。
A.
增大
B.
减小
C.
保持3A
D.
或增大或减小均可
【简答题】是(    )个 ,4个 是(    ),(    )个(    )是 。
【单选题】已知某三相同步发电机空载时,励磁电流为3 A,输出额定电压为400 V。若现带上一定大小的感性负载,要保持端口电压额定,则励磁电流____。
A.
增大
B.
减小
C.
保持3 A
D.
或增大或减小均可,但不能不变
【单选题】---Mum, ________ shall we have lunch? ---We will have it when your dad ____________.
A.
when; returns
B.
where; will returns
C.
where; returns
D.
when; will returns
【简答题】--- Mum, what shall we have for _______dinner? --- Dumplings.
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