题型:问答题 有两个电阻R1=30Ω,R2=50Ω,若将它们串联在电路中,则加在它们两端的电压之比U1∶U2=_________;若将它们并联在电路中,则通过它们的电流之比I1∶I2=___________。 查看答案
题型:问答题 The giving-way vessel has a same meaning of().A.stand-on vesselB.privileged vesselC.burdened vesselD.hampered vessel 查看答案