A.1Ω/100Ω B.10kΩ/100Ω C.10kΩ/10Ω D.1Ω/10kΩ
A.0.1Ω/100Ω B.1Ω/1000Ω C.1Ω/100Ω D.1Ω/10Ω
A.分頻 B.增大電阻 C.分流 D.分壓