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【简答题】
试简述最小相位系统的概念。若某闭环系统的开环传递函数为 ,并判断该闭环系统是否为最小相位系统。
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举一反三
【单选题】We will arrive at the cinema in ten minutes _____ there isn't too much traffic in the street. [ ]
A.
till
B.
though
C.
before
D.
if
【单选题】—There is much in the classroom. —Yes, it is too . [ ]
A.
noise; noise
B.
noisy; noisy
C.
noisy; noise
D.
noise; noisy
【单选题】------Don’t drive so fast please. There is _________traffic at this time of the day.
A.
much too
B.
too much
C.
many too
D.
too many
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