A.0.8*额定电流 B.0.9*额定电流 C.1.0*额定电流 D.1.2*额定电流
A.0.5*额定电压 B.0.6*额定电压 C.0.7*额定电压 D.0.8*额定电压
A.≤10s B.≤15s C.≤20s D.≤30s