作用在普通轻型单吊杆头部的力主要有:() ①、载荷;②、千斤索张力;③、过吊货滑车后 发布时间:2017-10-10 00:58 │ 来源:www.tikuol.com 题型:单项选择题 问题: 作用在普通轻型单吊杆头部的力主要有:()①、载荷;②、千斤索张力;③、过吊货滑车后的吊货索张力;④、吊杆自重A.②、③、④B.①、③、④C.①、②、④D.①、②、③
题型:单项选择题 When is the sport meet going to be heldA. Next Tuesday. B. This Thursday. C. Next week. 查看答案