单选题已知并联电路电阻R1=600Ω,R2=400Ω,总电流为5A,试求该电路中流过R1和R2的电流I1和I2分别是多少( )A:I1=3A:I2=2AB:I1=2A:I2=3AC:I1=4A:I2=1AD:I1=2.8A:I2=2.2A 电阻 已知 发布时间:2024-04-01 19:59:03