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【判断题】
干扰通道存在纯时间滞后时,会严重影响控制系统的动态特性,使被控参数对干扰的响应在时间上比无滞后存在。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】A．They pressed the alarm. B．They tried to stop him. C．They stood aside watching him gathering the money. D．They were too frightened to do anything.
【单选题】The hospital may have exposed the patients to the viruses, because
A.
they tried to protect their delicate instruments.
B.
they didn't follow the policy accordingly.
C.
they didn't know how to follow the policy sometimes.
D.
they have good intentions but the end result is bad.
【简答题】They tried to restrict access to ________ they believed to be erous areas. A) what B) which C) that D) everywhere
【简答题】Which mountain did they say they tried to climb?
【单选题】They tried to restrict access to ( ) they believed to be dangerous areas.
A.
what
B.
which
C.
that
D.
everywhere
【单选题】They tried to restrict access to ______ they believed to be dangerous areas.
A.
which
B.
what
C.
that
D.
everywhere
【单选题】What happened to the workers when they tried to save their colleague in the tank?
A.
They lost their balance.
B.
They still kept their balance.
C.
They lost consciousness.
D.
They died immediately.
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