关于鲁棒控制的意思，下属描述正确的是( )A．抵抗动态刚度变化的一种闭环控制算法
题型：单项选择题
问题：
关于鲁棒控制的意思，下属描述正确的是( )
A．抵抗动态刚度变化的一种闭环控制算法
B．即使负载贸量和扭矩干扰等使电机负载发生变化时，也不会影响伺服系统的工作
C．负载惯量和扭矩干扰等使电机负载发生变化时，也会使伺服系统的跟随误差发生变化
D．当电机负载发生变化时，会造成伺服电机的动态响应呈棒条状规律变化
题型：单项选择题
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| Manners nowadays in metropolitan cities like London are practically nonexistent.It is nothing for a big, strong schoolboy to push an elderly woman aside to take the last remaining seat on the underway or bus. This question of giving up seats in public transport is much argued about by young men,who say that since women have claimed equality,they no longer deserve to be treated with politeness and th  at those who go out to work should take their turns in the rat race like anyone else.But women have never claimed to be physically strong as men.Even if it is not agreed,however,the fact remains that courtesy(礼节) should be shown to the old and the sick.Are we really so lost to all ideals of unselfishness that we can sit there indifferently(冷漠地) reading the paper or a book,saying to ourselves,"First come,first served" while a greyhaired woman,a mother with a young child or a cripple(残障者) stands?Yet this is all too often seen. Older people,tired and impatient from a day's work,are not always considerate either - far from it. Many arguments break out as the older people push and squeeze(挤)each other to get on buses.One cannot approve this,of course,but one does feel there is just a little more excuse. It seems urgent,not only that communications in transport should be improved,but also that communication between human beings should be kept smooth and polite.All over cities,it seems that people are too tired and too rushed to be polite.Shop assistants won't bother to assist；taxi drivers shout at each other as they dash dangerously around corners；bus conductors pull the bell before their desperate passengers have time to get on or off the bus,and so on.It seems to us that it is up to the young to do their small part to stop such lowering of moral standards. Title:Manners in Metropolitan Cities | ||||||||||||||||||||||||
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