問題詳情
5. 設正實數b滿 足 
。 試 選 出 正 確 的 選 項 。
(A)
(B)
(C)
(D) 
(E)
參考答案
答案：D
難度：非常簡單1
統計：A(0),B(0),C(0),D(1),E(0)
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