某台三相交流异步电动机,其技术资料为:U IN =380V,f N =50HZ,定子绕组为三角形接法,n N =962r/min,2p=6,cosφ N =0.83,P N =7.5kW,p Cu1 =470W,p Fe =234W,p mec =45W,p△=80W。试求额定负载时: 转差率是多少?
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【单选题】Teachers believing in the __________ model in a general sense usually follow the sequence of teaching new words, sentences and then the whole passage in the 'reading class.
【单选题】Teachers believing in the _________ model in a general sense usually follow the sequence of teaching new words, sentences and then the whole passage in the reading class. (2013-03)
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