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23.圖解同平面力系平衡時,其必要條件為:(A)力多邊形閉合即可 (B)索線多邊形閉合即可(C)力多邊形及索線多邊形均須閉合 (D)力多邊形閉合,索線多邊形首索與末索平行
問題詳情
23.圖解同平面力系平衡時,其必要條件為:
(A)力多邊形閉合即可
(B)索線多邊形閉合即可
(C)力多邊形及索線多邊形均須閉合
(D)力多邊形閉合,索線多邊形首索與末索平行
參考答案
答案:
[無官方正解]
難度:
計算中
-1
書單:
沒有書單,新增
上一篇 :
22.下列有關塑性加工的敘述,何者正確?(A)鉛常在室溫(25℃) 加工,因為沒有加熱所以屬於冷作(B)加工同一工件,冷作所需的成形壓力比熱作大(C)熱作的溫度在材料的再結晶溫度以下(D)熱作製成的工
下一篇 :
24.外形規則的均質物體,其重心位置之求法,一般使用:(A)正弦定律 (B)餘弦定律 (C)拉密定理 (D)力矩原理
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