横向
1
Total number of people in an area
6
Largest ocean on Earth
7
Land surrounded by water on three sides
8
Landform where river meets the sea
9
Piece of land jutting into the sea
纵向
2
Height above sea level
3
Largest river in South America
4
Wearing away of land by water or wind
5
City that is seat of government
10
Large slow-moving mass of ice