[A\] embarrassing\[B\] inspiring\[C\] upgrading\[D\] innovating
第1题:
第2题:
第3题:
A、B、C、D为任意集合,以下正确的是
A.(A∪B)´(C∪D) = (A´C)∪(B´D)
B.(A-B)´(C-D) = (A´C)-(B´D)
C.(A∩B)´(C∩D) = (A´C)∩(B´D)
D.(AÅB)´(CÅD) = (A´C) Å (B´D)
第4题:
第5题:
3、A、B、C、D为任意集合,以下正确的是
A.(A∪B)´(C∪D) = (A´C)∪(B´D)
B.(A-B)´(C-D) = (A´C)-(B´D)
C.(A∩B)´(C∩D) = (A´C)∩(B´D)
D.(AÅB)´(CÅD) = (A´C) Å (B´D)