题目
A.(x)(A(x)一B(x))∧(y)(A(y)一下B(y))
B.(x)(B(x)→A(x))∧(y)(┓A(y)∧B(y))
C.(x)(A(x)→B(x))∧(y)(A(y)∧B(y))
D.(x)(┓A(x)VB(x))∧(y)(┓A(y)∧B(y))
第2题
A.(x)(P(x)∧Q(x))
B.┐(x)(P(x)→┐Q(x))
C.(x)(P(x)→Q(x))
D.┐(x)(P(x)∧Q(x))
第10题
A.┐(∀x)(A(x)→B(x))
B.┐(∃x)(┐A(x)∧┐B(x))
C.(∀x)(A(x)∧B(x))
D.(∃x)(A(x)∧B(x))
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