問題詳情
20. 附圖的長方體中， 
。若點P、Q分別在 
上，試問下列敘述何者錯誤？
(A) 
的長度為 
。
(B)有一隻螞蟻沿著長方體表面，欲從C點爬行至E點，其最短路徑為 
(C) 
的最小值為 
。
(D) 
的最小值為 
參考答案
無參考答案
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