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【单选题】
被控变量的信息要送回到自动控制装置的控制系统为( )。A.
开环控制系统
B.
闭环控制系统
C.
半开环控制系统
D.
半闭环控制系统
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举一反三
【简答题】A．Princeton. B．Yale. C．Harvard. D．Stanford.
【简答题】Yale is composed of______ colleges.
【简答题】Yale University is named after Elihu Yale, who once worked for EIC as ______.
【简答题】All urgent matters have now been ______. A) attended B) attended to C) attended at D) to attend
【单选题】We didn't see Tom at the meeting yesterday. He ________it. A. mustn't have attended B. cannot have attended C. needn't have attended D. would have not attended
A.
mustn't have attended
B.
cannot have attended
C.
needn't have attended
D.
would have not attended
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【简答题】All urgent matters have now been ______. A) attended B) attended to C) attended at D) to attend
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