横向
1
Total number of people in an area
5
Landform where river meets the sea
7
Deep narrow valley with steep sides
8
Large slow-moving mass of ice
9
Largest river in South America
纵向
2
Where river meets the sea
3
Largest hot desert in the world
4
Steep rock face at edge of land
6
Low-lying land surrounded by higher ground
10
Ocean between Americas and Europe/Africa
11
Land surrounded by water