2.______兩 ______兩個非空集合 A、B ，若 A − B = φ 且B − A = φ ，則 A = B 。 (A)O(B)X

問題詳情

2.______兩 ______兩個非空集合 A、B ，若 A − B = φ 且B − A = φ ，則 A = B 。
(A)O
(B)X

參考答案

答案：B[無官方正解]
難度：困難0.25
統計：A(4),B(2),C(0),D(0),E(0)

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