异步电动机的转差率是指同步转数与转子转速之差
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新中国成立初期,我国对官僚资本采取的政策是()。
Americaisan__________country.Youcanhear__________everywhere.
设A为3阶方阵,特征值分别为-2,1,1,则|5A-1|=______________.
Youshouldtrytowrite__________evenwhenyou’rebusy.Asyouknow,practicemakesperfect.
Thebabyalwayssleepswithhiseyeshalf_____.