A:b﹣a=n+m
B:a﹣b=n﹣m
C:质子数Y>X
D:核电荷数Y<X
港澳地区与珠江三角洲地区在经济发展中存在互补的关系,下列关于其优势叙述正确的是( )
Monkeys are the _______ animals in the world. They can do something like us.