架空光缆与铁路交越时最低缆线距铁路面最小垂直净距为()。A.6M B.6.5M 发布时间:2017-07-28 23:52 │ 来源:www.tikuol.com 题型:单项选择题 问题: 架空光缆与铁路交越时最低缆线距铁路面最小垂直净距为()。A.6M B.6.5M C.7.0M D.7.5M
题型:单项选择题 28. My English teacher has given me so much help that I really want to do something for him ______.A.in returnB.in factC.in surpriseD.in turn 查看答案