关于三圈环流的叙述不正确的有( )
A:赤道地区上空,水平气压梯度力指向高纬地区
B:南北纬30º附近上空,空气堆积下沉
C:东北信风与东南信风在赤道附近辐合上升
D:盛行西风与信风在南北纬60º附近相遇
Some girls are studying in the classroom and the ____ girls are singing on the playground. (other/else)