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【简答题】
根据有界输入有界输出判据,系统稳定性如何划分?稳定系统的充要条件是什么?
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参考答案:
举一反三
【多选题】由于自然万物的时令变化规律造成的观景赏美活动主要有()。
A.
清明踏青
B.
重阳登高
C.
钱塘观潮
D.
秋赏红叶
E.
冬观蜡梅
【单选题】下列轴承合金中,属于巴氏合金的是( )。
A.
铜铅合金
B.
锡基轴承合金
C.
青铜
D.
钼基轴承合金
【多选题】由于自然万物的时令变化规律造成的观景赏美活动主要有()
A.
清明踏青
B.
重阳登高城
C.
钱塘观潮
D.
秋赏红叶的
E.
观腊梅
【多选题】由于自然万物的时令变化规律造成的观景赏美活动主要有
A.
清明踏青
B.
重阳登高
C.
钱塘观潮
D.
秋赏红叶
E.
冬观腊梅
【单选题】下列各组词语中,加点字的注音有误的一组是(3分)( )
A.
重 磅 (bàng) 槌 门(chuí) 禀 赋(bǐng)    一 垛 (duò)
B.
褥 子(rù) 桅 杆(wéi) 驯 服(xùn) 颠 踬 (zhì)
C.
锚 索(máo) 痉 挛(jīng) 瞥 见(piē) 堵 塞 (sè)
D.
晕 眩 (xuàn) 飓 风(jù) 剐 破(guǎ) 摇 曳 (yè)
【单选题】Paragraph 2The fact that electronic computers are now used for data processing has led the general public to believe that it is a mysterious, complicated science and that the computers are giant brain...
A.
A computer is a high-speed adding machine.
B.
A computer is a mysterious giant brain.
C.
A computer is impressive because of its high speed.
D.
A computer is superior to man in many ways.
【单选题】电路如图所示,有源二端网络的等效入端电阻Rab为( )
A.
18kΩ
B.
6kΩ
C.
2kΩ
D.
0kΩ
【单选题】The fact that electronic computers are now used for data processing has led the general public to believe that it is a mysterious, complicated science and that the computers are giant brains. Both of ...
A.
A computer is a high-speed adding machine.
B.
A computer is a mysterious giant brain.
C.
A computer is impressive because of its high speed.
D.
A computer is superior to man in many ways .
【简答题】A.Two mechanical pilots will do the job. B.The giant jet will crash. C.The giant jet will be forced to land. D.The engines of the giant jet will stop working.
【单选题】如图所示的有源二端网络的入端电阻 R AB 为( )。
A.
1/2KΩ
B.
1/3KΩ
C.
3KΩ
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