<img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/f3/64/f364526ae8bef8dde43efb7a5fde38fd.gif" style="width: 100%;height: auto;"><img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/27/fc/27fcfbdc1f0938c44455910f6082774c.gif" style="width: 100%;height: auto;"> 所给定的斜缀条的稳定承载力为()kN。