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Y-132-4,三相异步电动机额定数据为：PN=7.5KW,UN=380V,IN=15.4A,nN=1440r/min,功率因素为0.85 过载系数为2.2,求：输入功率P1,额定效率,最大转矩?
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This coat doesn't fit him well, as he has ________ a huge body and the coat is________ small.
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It was a cold afternoon in winter.
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某校13名学生参加军事冬令营活动，活动期间各自扮演一名角色进行分组游戏，角色按级别从小到大共9种
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Look! The students are ________ (clean) their classroom.
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