横向
1
Flat grassland in tropical regions
5
Flat elevated area of land
7
Physical features of land
8
Body of water surrounded by land
纵向
2
Land surrounded by water
3
Cold treeless Arctic plain
4
Largest river in South America
6
Half of the Earth
Flat grassland in tropical regions
Flat elevated area of land
Physical features of land
Body of water surrounded by land
Land surrounded by water
Cold treeless Arctic plain
Largest river in South America
Half of the Earth