横向
1
Ocean between Americas and Europe/Africa
6
Largest river in South America
7
Deep narrow valley with steep sides
8
Cold treeless Arctic plain
9
Steep rock face at edge of land
纵向
2
Largest hot desert in the world
3
Land surrounded by water on three sides
4
Land surrounded by water
5
Raised area of land, smaller than a mountain
10
Distance north or south of equator