[单选题]设集合A={1,2,3} ，集合B={a,b} ，计算A×B=（ ）。
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2023-11-01 15:11:14|
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[单选题]设集合A={1,2,3} ，集合B={a,b} ，计算A×B=（ ）。
A.{<1,a >,<1,b >,<2,a >,<2,b >,<3,a >,<3,b >}
B.{ < a,1 >,< a,2 >,< a,3 >,< b,1 >,< b,2 >,< b,3 > }
C.{< a,1 >,< b,2 >}
D.{< 1,a >,< 2,b >}
A.{<1,a >,<1,b >,<2,a >,<2,b >,<3,a >,<3,b >}
B.{ < a,1 >,< a,2 >,< a,3 >,< b,1 >,< b,2 >,< b,3 > }
C.{< a,1 >,< b,2 >}
D.{< 1,a >,< 2,b >}
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