井下电缆必须悬挂,在水平巷道或倾斜井巷内悬挂点间距不得大于3m() 发布时间:2017-06-22 07:51 │ 来源:www.tikuol.com 题型:判断题 问题: 井下电缆必须悬挂,在水平巷道或倾斜井巷内悬挂点间距不得大于3m()
题型:判断题 Hiking by oneself can be fun and good for health. It may also be good for ______ building.A.respectB.friendshipC.reputationD.character 查看答案