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【单选题】

How many two-element subsets of 1, 2, 3, 4are there that do not contain the pair of elements 2 and 4

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根据网考网移动考试中心的统计,该试题:

8%的考友选择了A选项

12%的考友选择了B选项

13%的考友选择了C选项

67%的考友选择了D选项

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