四、圖示柱斷面尺寸，試求此柱之平衡載重 Pb 值為何？此柱若承受軸壓設計載重Pu=216 tf，則此軸壓載重狀況下，其破壞模式為拉力破壞或壓力破壞？請解釋其依據。在此狀況破壞時壓力側鋼筋及另一側鋼筋所對應之應力值為何？（25 分）
【用戶】Julia Su
【年級】高一上
【評論內容】Today science fiction writers write about life on other planets and how human beings can live longer. People from all walks of life are involved in thinking about the future because our survival may depend upon it.
【用戶】limm
【年級】國二下
【評論內容】主要是問這一段吧 科學家和工程師找出如何可以讓現今科技更進一步的發展Scientists and engineers find out how current technology can be further developed.(B)是這段在說"科幻小說作家"的創意想法之類的Today science fiction writers write about life on other planets and how human beings can live longer. People from all walks of life are involved in thinking about the future because our survival may depend upon it.