【多选题】【消耗次数：1】
开环稳定的系统，其闭环（），开环不稳定的系统，其闭环（）
①
不一定稳定
②
不一定不稳定
③
一定稳定
④
一定不稳定
参考答案：
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相关题目
【单选题】
下列系统中属于不稳定的系统是（）。
①
闭环极点为<imgwidth="87"height="26"src="../uploadfiles/word/zdkzll002.files/image031.png">的系统
②
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③
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④
脉冲响应为<imgwidth="76"height="24"src="../uploadfiles/word/zdkzll002.files/image034.png">的系统
随机题目
【单选题】
The time will surely come ____ ordinary people could operate computers as well.
①
when
②
till
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while
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as
【单选题】
Nothing must be allowed to ____ with our plans for the weekend.
①
influence
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break
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【单选题】
Sometimes people just say eight-fifteen____ a quarter past eight.
①
out of
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ahead of
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because of
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【单选题】
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①
interfere
②
introduce
③
interrupt
④
prevent
【单选题】
Train services are now back to ____after last week’s strike.?
①
ordinary ?
②
usual ?
③
normal ?
④
natural?
【单选题】
I thought I knew the way, but ____I got lost.
①
somehow
②
somewhat
③
anyhow
④
anyway
【单选题】
The ____ of the trees grew longer as the afternoon went on. ?
①
images ?
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pictures ?
③
photos ?
④
shadows ?
【单选题】
The British people and the American people not only speak the same language but ____ a lot of special customs as well.
①
share
②
spare
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hold
④
carry
【单选题】
“Are you ready for your paper?” “Not yet. I need___ to read through it.”
①
other three minutes
②
another three minutes
③
three other minutes
④
more three minutes