两个电阻R1、R2,且R1:R2=2:3,将它们并联在电路中,R1、R2两端的电压分别为U1、U2;通过R1、R2的电流分别为I1、I2,则( )A.I1:I2=2:3B.U1:U2=2:3C.I1:I2=3:2D.U1:U2=3:2答案:∵R1、R2并联,∴两电阻两端的电压相等,即U1:U2=1:1;∵I=UR,∴I1:I2=R2:R1=3:2.故选C.来源:中国机电网