若a是正整數，則使也是正整數的a不包括下列何者？(A)1 (B)7(C)13 (D)143

問題詳情

若a是正整數，則使

也是正整數的a不包括下列何者？
(A)1
(B)7
(C)13
(D)143

參考答案

答案：B
難度：非常簡單0.966019
統計：A(4),B(199),C(2),D(1),E(0)

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