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【多选题】
在控制系统中,下列说法正确的是A.
被控量的选择有直接法和间接法两种。
B.
被控量只能直接测量，不能用其他量代替。
C.
控制通道相对于扰动通道反应越快，控制效果越好。
D.
在影响输出的诸多输入信号中，确定一个为控制信号后，其他输入的就是扰动。
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反馈参考答案：
举一反三
【单选题】Police say a man was carrying a dead weasel when he burst into an apartment and assaulted a man in Washington state.
A.
derived
B.
attacked
C.
followed
D.
rejuvenated
【单选题】He burst into laughter， as though he had heard something funny.
A.
as if
B.
as well
C.
so that
D.
said
【简答题】产品市场定位的一般原则有哪些?
【单选题】Hearing his father was seriously ill, ______.
A.
he burst into tears
B.
his eyes were filled with tears
C.
his face lost its colour
D.
tears came to his eyes
【单选题】One minute he burst into_______ and the next burst out_______. We just couldn’t catch her mood at any moment.
A.
crying; laughter
B.
tears; laughing
C.
tears; laughter
D.
crying; laughing
【简答题】市场定位依据的原则有哪些
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