电阻R1=2Ω和R2=4Ω串联,则电阻上的电压比U1:U2=()。A1:2B1:4C2:1D4:1
电阻R1=2Ω和R2=4Ω串联,则电阻上的电压比U1:U2=()。
A1:2
B1:4
C2:1
D4:1
参考解析
略
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