• 2022-06-30
    图示桁架各杆EA相同,为常数。则结点C的竖向位移为()。[img=203x105]180379b4449a0f2.jpg[/img]
    A: [img=33x46]180379b44ddd7a9.png[/img]
    B: [img=33x46]180379b4574f81d.png[/img]
    C: [img=40x46]180379b46075939.png[/img]
    D: [img=40x46]180379b469abe27.png[/img]