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3.控制系统的闭环传递函数拉氏反变换是系统的(   )响应。
A、谐波
B、单位阶跃
C、单位脉冲
D、单位斜坡

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A.
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Which one is not true about the traditional Chinese medicine? A、It insists that social harmony needs to be maintained to restore the balance of yin and yang in one's body. B、It offers a fragmentary view of body. C、It is for chronic diseases or maintaining health with the emphasis on longevity as a lasting value. D、It has also become increasingly popular in the West.
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