20kV户外隔离开关的外绝缘爬电比距是≥()。 A.10mm/kV B.15mm/k 发布时间:2018-02-08 05:12 │ 来源:www.tikuol.com 题型:单项选择题 问题: 20kV户外隔离开关的外绝缘爬电比距是≥()。A.10mm/kVB.15mm/kVC.20mm/kVD.30mm/kV
题型:单项选择题 I saw some boy students _ basketball when I passed the playground.A.playedB.playsC.playingD.to play 查看答案