搭设扣件式钢管脚手架时,只有在拧紧紧固螺栓的情况下,才能在扣件与钢管杆之间产生足够的 发布时间:2020-06-25 03:20 │ 来源:www.tikuol.com 题型:单项选择题 问题: 搭设扣件式钢管脚手架时,只有在拧紧紧固螺栓的情况下,才能在扣件与钢管杆之间产生足够的(),以传递来自顺水杆的荷载,并确保连结节点不变形。A.摩擦力B.压力C.拉力D.扭转力
题型:单项选择题 — All the building materials have been washed away. — So I have heard. But there was no sign____a heavy rain was on the way last night. [ ]A. when B. if C. which D. that 查看答案