A.電壓調(diào)整率太低 B.重負(fù)載時(shí)濾波效果差 C.輕負(fù)載時(shí)漣波小 D.太昂貴
A.4.5V B.3.18V C.9V D.6.36V
A.30V B.50V C.100V D.150V