横向
1
Ridge of rock or coral near the surface
3
Height above sea level
5
Cold treeless Arctic plain
7
Large natural elevation of earth
8
Large slow-moving mass of ice
11
Mountain that can erupt with lava
纵向
2
Flat elevated area of land
4
Physical features of land
6
Flat grassland in tropical regions
9
Vast body of salt water
10
Large natural stream of water
12
Steep rock face at edge of land