异步电动机的同步转速即其旋转磁场的转速。
参考答案:对
I'm so hungry. Please give me ______ to eat
A.three bread
B.three pieces of bread
C.three pieces of breads
D.three piece of bread
《出境货物报检单》的“合同号”可填写对外贸易合同、订单或形式发票的号码。