发电机工作时把______能转化为电能;我国供生产和生活用的交流电,频率是___ 发布时间:2017-06-21 15:09 │ 来源:www.tikuol.com 题型:填空题 问题: 发电机工作时把______能转化为电能;我国供生产和生活用的交流电,频率是______Hz.
题型:填空题 He was annoyed for _________ outside while his wife was shopping with the key.A.being keptB.keepingC.keptD.to be kept 查看答案