問題詳情
76. 如圖 
有一桁架承受平行垂直外力，假設在O點及A點的反作用力均受限於5000磅，則W的最大值為？
(A)800磅
(B)900磅
(C)1000磅
(D)1100磅
參考答案
無參考答案
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