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满足{0,1,2}真包含于A包含于{0,1,2,3,4,5}的集合A的个数为
人气:218 ℃ 时间:2020-02-04 21:29:18
解答
7个,{0,1,2,3}{0,1,2,4}{0,1,2,5}{0,1,2,3,4}{0,1,2,3,5}{0,1,2,4,5}{0,1,2,3,4,5}
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