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[单选题]
令A={1, 2, 3, 4, 5, 6, 7, 8, 9, 10},A1={1, 2, 3, 4},A2={5, 6, 7},A3={5, 7, 9},A4={4, 8, 10},A5={8, 9, 10},A6={1, 2, 3, 4, 6, 8, 10},A7={1, 2, 3, 6}。则以下的()不构成A的一个划分。
A.{A1, A2, A5}
B.{A3, A6}
C.{A2, A3, A4}
D.{A3, A4, A7}
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
A.{A1, A2, A5}
B.{A3, A6}
C.{A2, A3, A4}
D.{A3, A4, A7}
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