三相异步电动机定子匝间短路有哪些异常现象?
参考答案:
三相电流不平衡;
电机有异音;
电机发热。
根据受伤部位的皮肤或黏膜完整性受到破坏与否可将损伤分为()
A.皮肤伤
B.筋骨伤
C.闭合性损伤
D.开放性损伤
E.脏腑伤
He is going to the town for the _____of buying a computer for his son. [ ]
A. advice
B. need
C. purpose
D. desire