A. 30Ω B. 25Ω C. 15Ω D. 10ΩD

tikufree2020-05-20  12

问题

选项 A. 30ΩB. 25ΩC. 15ΩD. 10Ω

答案D

解析[img]/upload/tiku/139/342420_1.jpg[/img][img]/upload/tiku/139/342420_1_1.jpg[/img]
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