关于锚杆布置,叙述错误的是()。A.锚杆应与岩体主结构面成较小角度布置 B.拱部锚杆 发布时间:2020-02-09 06:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 关于锚杆布置,叙述错误的是()。A.锚杆应与岩体主结构面成较小角度布置B.拱部锚杆主要考虑抗拉,墙部锚杆主要考虑抗滑C.岩面上,锚杆宜呈菱形布置
题型:单项选择题 His father is______than his mother. [ ]A. older four years B. as four years older C. four years older 查看答案