电泳涂装用整流器是通过（）或（）完成的，这些电器元件只允许电流定向传输，是获得直流电的有效手段。
参考答案：二极管；可控硅
--- Do you have __________ else to say for your mistakes?
--- ________ but sorry.
A．anything; Something
B．something; Everything
C．something; Anything
D．anything; Nothing
化学摔软有哪些优点？
