例1:已知t<0时电路已处于稳态, 求uc(04),1(0+),i2(0) 20g2 10V 30g2 0.1F t=010V + _ uC t = 0 i2 i1 20 30 0.1F 例1：已知 t < 0 时电路已处于稳态， 求 uC (0+ ) , i1 (0+ ) , i2 (0+ )