材料的屈服点变化对压杆的弹性屈曲承载力影响不大
正确
暂无解析
As____clearfromhismanners,heisateacher.
___willMr.Forbesbeabletoregaincontrolofthecompany.
Thebeachisinanideal（）todrawtourists.
The____populatedareawasabreedingplaceforinfectiousdiseases.
Wecanhear（）fromthebackoftheroom.
