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根轨迹的分支数与开环有限零点数和有限极点数的大者相等,它们是连续的并且对称于______。
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根轨迹的分支数与开环有限零点数和有限极点数的大者相等,它们是连续的并且对称于______。
A、原点
B、虚轴
C、实轴
D、y=x轴
时间：2021-09-01 16:43
关键词：
青书学堂
平顶山学院
机械电子工程
控制工程基础(专升本)
答案解析
C
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根轨迹的分支数与开环有限零点数和有限极点数的大者相等,它们是连续的并且对称于______。
如果系统的开环零点数超过极点数，则根轨迹的分支数等于（ ）。
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Mainly east 3 or 4 partly cloudy to overcast occasional rain（）slowly south moderate or good.
根轨迹在s平面上的分支数等于闭环特征方程的阶数。
（）any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local quarantine officer must be notified immediately．
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If he is a common carrier，he is absolutely responsible to the owner of the goods carried （）any loss or damage to them unless caused by an Act of God or the Queen’s enemies，or the inherent vice in the goods themselves，or the negligence of the owner of the goods，or a general average sacrifice.
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Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss，damage or delay has been caused by the improper or negligent stowage of the goods．This means that（）.
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire，（）the claimant proves that the fire arose from fault or neglect on the part of the carrier，his servants or agents.
根轨迹在平的分支数等（）
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