A.2V,lΩ B.1V,O.5Ω C.1V,2Ω D.-1V,O.5Ω

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问题 A.2V,lΩB.1V,O.5ΩC.1V,2ΩD.-1V,O.5Ω

选项 A.2V,lΩ
B.1V,O.5Ω
C.1V,2Ω
D.-1V,O.5Ω

答案 B

解析
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