A
若 $\varnothing \varsubsetneqq A \varsubsetneqq B$ ,则 $\exists x \notin A, x \in B$
B
若 $\varnothing \varsubsetneqq A \subseteq B$ ,则 $\forall x \notin A, x \notin B$
C
"$\forall x>0, x^2>x$"的否定是"$\exists x>0, x^2 \leqslant x$"
D
"$\exists x \in \mathbf{N}^*, \frac{1}{x} \in \mathbf{N}^*$"是真命题
E
F