一台三相笼型异步电动机的数据为PN=11kW,nN=1460r/min,UN=380V,αMT=2。
参考答案:
It's impossible for all the people to get jobs because _____of them are not fit for them.
A.none
B.all
C.not all
D.every one
什么是不安全行为?