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A.0∉M | B.2∈M | C.-4∉M | D.4∈M |
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|y| |
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|x| |
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1 |
1-a |
1 |
a |
x+a |
x2-2 |
A.2010∈A∪B | B.2010∉A且2010∉B |
C.2010∈({C_U}A)∩({C_U}B) | D.2010∈({C_U}A)∪({C_U}B) |
A.{3} | B.{3,4,5,6} | C.{{3}} | D.{{3},Φ} |
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