脚手架采用的扣件,在螺栓拧紧扭力矩达()时,不得发生破坏。 A.55N2m B.65 发布时间:2019-01-16 10:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: 脚手架采用的扣件,在螺栓拧紧扭力矩达()时,不得发生破坏。A.55N2mB.65N2mC.75N2m
题型:单项选择题 A decorator bought a bolt of defective cloth that he judged to be usable, in which ease the cost would be $0.80 per usable yard. If it was later found that only of the bolt could be used, what was the actual cost per usable yard ?()A.$0.60B.$0.90C.$1.00D.$1.20E.$1.70 查看答案