問題詳情
8. △ABC 中，D、E 兩點分別在 
、 
上，下列哪一選項 
和
不一定平行？
(A) D、E 分別為 、 
的中點
(B) 
： ＝ 
：
(C)
： ＝ 
：
(D) ： ＝ ： 。
參考答案
無參考答案
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