多选题 (共 1 题 ),每题有多个选项正确
下列四个公式正确的有()
$\text{A.}$ $\forall x(A(x) \wedge B(x)) \Longrightarrow \forall x A(x) \wedge \forall x B(x)$
$\text{B.}$ $\forall x(A(x) \vee B(x)) \Longrightarrow \forall x A(x) \vee \forall x B(x)$
$\text{C.}$ $\exists x(A(x) \vee B(x)) \Longrightarrow \exists x A(x) \vee \exists x B(x)$
$\text{D.}$ $\exists x A(x) \wedge \exists x B(x) \Longrightarrow \exists x(A(x) \wedge B(x))$