单项选择题
A.13.4mAB.14mAC.15.5mAD.16mA
A.0.1mmB.0.2mmC.0.3mmD.0.35mm
A.1.2mmB.1.3mmC.1.5mmD.1.8mm
A.70ΩB.80ΩC.240ΩD.250Ω
微信扫一扫,加关注免费搜题