問題詳情
39 如下圖所示之桿件 AB 之楊氏模數、熱膨脹係數、橫斷面積及其慣性矩均為常數。於如圖所示之支撐條件下，原處於未受力狀態，當溫度均勻上升(T)cr 時會使其發生挫屈。若桿件不變，下列何種端點支承形式仍具相同之(△T)cr 值？ 
(A) 
(B) 
(C) 
(D) 
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