设 R={<0,1>,<0,2>,<0,3>,<1,2>,<1,3>,<2,3>}，则关系R的二次合成R○R等于：{<0,2>,<0,3>,<1,3>}。 A、正确 B、错误

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成人高等教育 / 离散数学（上）

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设 R={<0,1>,<0,2>,<0,3>,<1,2>,<1,3>,<2,3>}，则关系R的二次合成R○R等于：{<0,2>,<0,3>,<1,3>}。

A、正确
B、错误

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离散数学（上）

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