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【单选题】
被控对象的干扰通道和控制通道的共同点是()。
A.
都是被控对象的输入信号
B.
都是被控对象的输出信号
C.
二者的通道特性是相同的
D.
信号联系的目标都是被控变量
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B.
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C.
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D.
都是重复性工作
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B.
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A.
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B.
There is something wrong with it.
C.
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D.
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【单选题】A: I'm sorry that I can't go to your party tonight. B: ______? Haven't we agreed on it?
A.
What is it
B.
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C.
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D.
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