問題詳情
3. 如右圖，欣欣在一個質地均勻的 △ABC 厚紙板上打了五個洞，亦即 P、Q、R、S 和 T 五點，其中
，且 D 為 
的中點。若她將一枝竹筷子分別頂入所打的洞內，然後旋轉此紙板，則竹筷子頂入哪一點時，此塊三角形厚紙板最有可能穩定平衡的旋轉？
(A)P 點
(B)Q 點
(C)R 點
(D)S 點。
參考答案
無參考答案
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