横向
1
Landform where river meets the sea
4
Cold treeless Arctic plain
5
Distance east or west of prime meridian
6
Land surrounded by water on three sides
9
Largest ocean on Earth
纵向
2
Line dividing two countries
3
Large area covered with trees
7
Narrow sea inlet between cliffs
8
Flat elevated area of land
10
Mountain that can erupt with lava