横向
1
Cold treeless Arctic plain
5
Low area between mountains
6
Goods brought in from another country
7
Visual representation of an area
8
Large natural stream of water
10
Largest ocean on Earth
11
Largest hot desert in the world
纵向
2
Wearing away of land by water or wind
3
Height above sea level
4
Half of the Earth
9
Line dividing two countries