设个体域D={a,b,c},那么谓词公式($x)A(x)∨(“”y)B(y)消去量词后的等值式为().
设个体域D={a,b,c},那么谓词公式($x)A(x)∨(“”y)B(y)消去量词后的等值式为().
A.(A(a)∨A(b)∨A(c))∨(B(a)∧B(b)∧B(c))
B.(A(a)∧A(b)∧A(c))∨(B(a)∨B(b)∨B(c))
C.(A(a)∨A(b)∨A(c))∨(B(a)∨B(b)∨B(c))
D.(A(a)∧A(b)∧A(c))∨(B(a)∧B(b)∧B(c))
正确答案:A