[单选题]设A={0，b}，B={1，b，3}，则AꓴB的恒等关系为（ ）。
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2023-11-01 15:11:10|
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[单选题]设A={0，b}，B={1，b，3}，则AꓴB的恒等关系为（ ）。
A.{<0，1>，<1，b>，<b，3>，<3，0>}
B.{<0，0>，<b，b>，<3，3>}
C.{<0，0>，<1，1>，<b，b>，<3，3>}
D.{<0，0>，<1，1>，<3，3>}
A.{<0，1>，<1，b>，<b，3>，<3，0>}
B.{<0，0>，<b，b>，<3，3>}
C.{<0，0>，<1，1>，<b，b>，<3，3>}
D.{<0，0>，<1，1>，<3，3>}
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