题目
题型:单选题难度:一般来源:不详
A.∅ | B.{1} | C.{1,2} | D.{(1,2)} |
答案
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解的:
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则A∩B={(1,2)}.
故选D
核心考点
举一反三
1 |
2 |
A.{0,1,2} | B.{2,3} | C.∅ | D.{0,1,2,3} |
A.∅ | B.{3+i} | C.{3+i,2+i} | D.{3+i,3+2i} |
A.∅ | B.{1} | C.{1,2} | D.{(1,2)} |
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1 |
2 |
A.{0,1,2} | B.{2,3} | C.∅ | D.{0,1,2,3} |
A.∅ | B.{3+i} | C.{3+i,2+i} | D.{3+i,3+2i} |