题目内容

某三相异步电动机额定运行时的转速为1440转/分钟，电源频率为50Hz，此时转子电流的频率为（）Hz。

A. 2
B. 50
C. 47
D. 3

查看答案

搜索结果不匹配？点我反馈

更多问题

狭义的翻译过程仅指，主要包括，和。

广义的翻译过程可以分为、和__ 。

Huntington has a limp handshake and soft voice, but he has too much intellectual self-confidence for shyness. He is lanky with a gentle, disarming smile that belies the toughness of his thinking. If his frame is weedy, his brain is supercharged.亨廷顿握起手来很轻，说话声音也很柔和，但是他充满了学术上的自信，丝毫没有怯意。他身形瘦削，一脸和善的笑容，与其冷峻的思想形成了明显的反差。如果说他身体瘦弱，他的大脑却格外发达。

美国馆展示了一部名为《花园》的短片，讲的是一个10岁的小女孩想要把一片废弃的空地变成一片城市绿洲，在她和邻居们的共同努力下将这个愿望变成现实的故事。The USA Pavilion features a show entitled a l0-year-old girl who envisages turning a vacant city lot into an urban oasis, working with her neighbors to make that happen.