设全集I={(x,y)|x、y∈R},集合M={(x,y)|=1},N={(x,y)|y≠x+1},那么(M)∩(N)等于( 

设全集I={(x,y)|x、y∈R},集合M={(x,y)|=1},N={(x,y)|y≠x+1},那么(M)∩(N)等于(    )

A.{(2,3)}           B.(2,3)                C.

            D.{(x,y)|y≠x+1}

答案

A

解析:∵M={(x,y)|y=x+1,x≠2},N={(x,y)|y≠x+1},

M={(x,y)|y≠x+1,或(2,3)},N={(x,y)|y=x+1},则(M)∩(N)={(2,3)}.

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