两电阻R1R2并联,U1:U2= I1:I2= 两电阻R1R2串联,U1:U2= I1:I2=

问题描述:

两电阻R1R2并联,U1:U2= I1:I2= 两电阻R1R2串联,U1:U2= I1:I2=