【判断题】三相异步电动机的定子与转子之间的空气隙太大,电动机运行时的功率因数降低。
【判断题】异步电动机的定子与转子之间的间隙越大,电动机的功率因数就越低,而同步电机的气隙大小不影响它的功率因数。
【单选题】听力原文:Six. What did the woman buy? Man: Did you get anything from the duty-free shop? Woman: Well, I really wanted some of that perfume I bought last time and I got a large bottle. Then I looked for th...
【判断题】异步电动机的定子与转子之间的间隙愈大,电动机的功率因数就愈低,而同步电动机的气隙大小不影响它的功率因数。()
【单选题】Mary had promised to give me aticket for tomorrow. She failed, ____.
【单选题】事故树评价法首先要确定________.
【简答题】Fill in
the blanks with the words given below, changing the form if necessary. Fill in each blank
with one word only. locate convince delight favorite
enclose confident d...
【判断题】异步电动机的定子与转子之间的间隙越大,电动机的功率因数就越低,而同步电机的气隙大小不影响它的功率因数。( )
【判断题】主回路和控制回路的导线颜色应有明显的区别。()