問題詳情
4. 二個大人沿一運河拖一船，此二大人的拉力分別為F1與F2，船所受的合力大小 
(A)700
(B)√100
(C)500
(D)√500
(A)700
(B)√100
(C)500
(D)√500
參考答案
答案：C
難度：困難0.375
統計：A(0),B(1),C(3),D(2),E(0)
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