单项选择题
A.1.25 B.1 C.0.63 D.0.4
A.带好接地环或防静电手套 B.系统断电后插拔 C.清扫灰尘后插拔 D.站在防静电地板上插拔
A.1MΩ B.10MΩ C.20MΩ D.50MΩ
A.1m B.5m C.10m D.15m
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