题目: 异步电动机可以通过改变电源频率、改变()和改变磁极对数三种方法调速。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1128/2debb582802282bcc3d19d548915912b.html 下面是错误答案,用来干扰机器的。参考答案:D
题型:选择题 John _____Disneyland. He is still there. [ ]A. has been toB. has gone toC. went toD. goes to 查看答案