[单选题]设集合A={1,2}，计算集合A上的小于等于关系。（ ）
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2023-11-01 15:11:15|
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[单选题]设集合A={1,2}，计算集合A上的小于等于关系。（ ）
A.{<1,1>,<1,2>,<2,1>,<2,2>}
B.{<1,1>,<1,2>,<2,2>}
C.{<1,2>}
D.{<1,1>,<2,2>}
A.{<1,1>,<1,2>,<2,1>,<2,2>}
B.{<1,1>,<1,2>,<2,2>}
C.{<1,2>}
D.{<1,1>,<2,2>}
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