一台他励直流电动机的铭牌数据为: P N =5.5KW, U N =110V, I N =62A, n N =1000r/min, 试求出固有机械特性,并绘出它的固有机械特性曲线。
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【单选题】A) The man regrets being absent-minded. B) The woman saved the man some trouble. C) The man placed the reading list on a desk. D) The woman emptied the waste paper basket.
【简答题】A.The man regrets being absent-minded. B.The woman saved the man some trouble. C.The man placed the reading list on a desk. D.The woman emptied the waste paper basket.