高壓檢修時,應遵守()的程序。 ①停電 ②驗電 ③放電 ④掛牌 ⑤接地 ⑥檢修
A.①-②-③-④-⑤-⑥ B.①-②-③-⑤-④-⑥ C.②-①-③-⑤-④-⑥ D.②-①-③-④-⑤-⑥
A.3 B.2 C.1.5 D.1
A.30cm B.50cm C.1m D.1.5m