A:f(x)=|x|与 g(x)=x2
B:f(x)=x0与g(x)=1
C:f(x)=x−1x+1 与 g(x)=x2−1
D:f(x)=x33 与 g(x)=x2
北约组织和华约组织的共同点是
______ does your mother have _______ dinner?