皮皮学，免费搜题
登录
搜题
【简答题】
三相异步电动机的额定转速为 2950r/min ,电源的频率 50HZ 。若电动机以转速 1000 r/min 运行,转差率为 。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】听下面一段材料，回答第1-4题。 1. What's the problem of some of the university students?. A. They don't spend all their time on studies. B. They don't know what to do with their free time. C. They don't have choice...
【简答题】下列各句均有一处错误,请找出并改正 1. - Whose pen is this ? - It's her . A B C D 2. They don't have any classes in Saturdays . A B C D 3. He enjoys swiming in the riv...
【简答题】教学无论效果怎样，都具有教育性。（ ）
相关题目：