横向
1
Flat elevated area of land
2
Deep narrow valley with steep sides
5
Large area covered with trees
9
Total number of people in an area
10
Largest river in South America
11
Landform where river meets the sea
纵向
2
One of seven major landmasses
3
Flat grassland in tropical regions
4
Area where water covers the soil
6
Large natural elevation of earth
7
Steep rock face at edge of land
8
Largest hot desert in the world