命题" $\exists x_0\in {\zeta }_{R}Q,{x_0}^3\in Q$"的否定是

A．	$\exists x_0\notin {\zeta }_{R}Q,{x_0}^3\in Q$	B．	$\exists x_0\in {\zeta }_{R}Q,{x_0}^3\notin Q$
C．	$\forall x_0\notin {\zeta }_{R}Q,{x_0}^3\in Q$	D．	$\forall x_0\in {\zeta }_{R}Q,{x_0}^3\in Q$