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调速系统中，电流截止负反馈是一种只在调速系统主电路过电流情况下起负反馈调节作用环节，用来限制主电路过电流，因此它属于保护环节。（ ）A.
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举一反三
【单选题】- What do you think of the contest? --- I was told that the English Speech Contest ______ successfully last night.
A.
went along
B.
went down
C.
went off
D.
went on
【单选题】听力原文：W: Hey, congratulations on winning the speech contest. That fifteen-hundred-dollar prize money should really come in handy. M: You bet! I've already put it aside to cover the increase my landlord...
A.
The man has to pay more for his rent next year.
B.
The woman and the man have made a bet
C.
The woman wants to borrow money flora the matt
D.
The man has won ＄150.
【多选题】海运提单的性质与作用是( )
A.
它是海运单据的唯一表现形式
B.
它是承运人或其代理人出具的货物收据
C.
它是代表货物所有权的凭证
D.
它是承运人与托运人之间订立运输契约的证明
【多选题】海运提单的性质与作用是( )。
A.
提单日期是货物装船完毕的日期
B.
它是承运人或其代理人出具的货物收据
C.
它是代表货物所有权的凭证
D.
它是承运人与托运人之间订立的运输契约的证明
【多选题】海运提单的性质与作用是( )
A.
是海运单据的唯一表现形式
B.
是承运人或其代理人出具的货物收据
C.
是代表货物所有权的凭证
D.
是承运人与托运人之间订立的运输契约的证明
【多选题】提单的性质与作用是( )。
A.
提单日期是货物装船完备的日期
B.
它是承运人或其代理人出具的货物收据
C.
它是代表货物所有权的凭证
D.
它是承运人与托运人之间订立的运输契约的证明
【多选题】海运提单的性质与作用是( )
A.
它是海运单据的唯一表现形式
B.
它是承运人或其代理人出具的货物收据
C.
它是代表货物所有权的凭证
D.
它是承运人与托运人之间订立的运输契约的证明
【单选题】听力原文：W: Do you know? Tom failed to win that speech contest. M: Did he? I thought for sure he wouldn't. He worked so hard on it. W: Perhaps that's why he lost. They thought he was simply reciting. How ...
A.
He thinks it is unbelievable.
B.
He thinks it was too hard for Tom.
C.
He thinks Tom worked too hard.
D.
He thinks Tom was not given a chance.
【简答题】提单的性质与作用是什么?
【单选题】听力原文：W: I'm sorry you didn't make it into the finals in the speech contest. I thought you did a great job. M: Let's face it, tonight made it obvious that I'm just not cut out to be a public speaker. Q...
A.
He has cut himself.
B.
He cannot face the public.
C.
He was too close to the speaker.
D.
He is not feeling well about the news.
相关题目：
【多选题】海运提单的性质与作用是( )。
A.
提单日期是货物装船完毕的日期
B.
它是承运人或其代理人出具的货物收据
C.
它是代表货物所有权的凭证
D.
它是承运人与托运人之间订立的运输契约的证明
参考解析：
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