【多选题】当杆件的 B端是刚结点时(它的约束比较支座强些,比固定端弱些), A端发生单位转动时,转动刚度 SAB应该是
【单选题】当杆件AB的A端的转动刚度为3i时,杆件的B端为()。
【单选题】当杆件AB的A端的转动刚度为3i寸,杆件的B端为()。
【判断题】The shape and size of a component has no or minor influence on the choice of the processing unit which ultimately affects the choice of the material.