下图是某海域海底岩石年龄分布图。读下图,要研究海底岩石年龄分布状况,并推测大洋地壳运动规律所用的地理信息技术是( )
A:GPS
B:RS
C:GIS
D:BDS(北斗导航系统)
There are many ____ (different) between living in a big city and living in the countryside.
不等式组2x+3>53x-2<4的解集是 ____.