横向
1
Flat elevated area of land
4
Wearing away of land by water or wind
7
Goods sold to another country
8
Landform where river meets the sea
纵向
2
Largest hot desert in the world
3
Land surrounded by water
5
City that is seat of government
6
Low-lying land surrounded by higher ground
9
One of seven major landmasses
10
Largest river in South America