三相异步电动机的转矩特性曲线是()。
A.T=f(s)
B.T=f(n)
C.u=f(s)
D.u=f(n)
参考答案:A
--What kind of apartment do you want to rent? A large one, Mr. Smith?
--Er, it ________ be a large one, as my family is not large.
A.wouldn’t
B.needn’t
C.shouldn’t
D.can’t
废油再生所用的离心分离法的原理是什么?