横向
1
Raised area of land, smaller than a mountain
2
Land surrounded by water on three sides
4
Cold treeless Arctic plain
5
Large natural elevation of earth
6
Largest river in South America
7
Physical features of land
8
One of seven major landmasses
9
Vast body of salt water
纵向
2
Total number of people in an area
3
Distance north or south of equator