横向
1
Steep rock face at edge of land
3
Where river meets the sea
5
Large slow-moving mass of ice
8
Wearing away of land by water or wind
9
Flat grassland in tropical regions
纵向
2
Land surrounded by water on three sides
4
Large area covered with trees
6
Landform where river meets the sea
7
Imaginary line around the middle of Earth
10
Total number of people in an area
11
Ocean between Americas and Europe/Africa