有一台三相异步电动机,额定输出功率为2.2KW,额定电压为380V,功率因数为0.86,效率为0.88,求电动机额定电流?
参考答案:
一般等价物可以表现其他一切商品的价值,充当商品交换的媒介。
During the entrance exam,there are___________ parents waiting for their children outside the test centre.
A.thousand of
B.thousands of
C.thousand
D.thousands