横向
1
Physical features of land
6
Cold treeless Arctic plain
7
Height above sea level
8
Long-term weather patterns of an area
11
Largest ocean on Earth
12
Body of water surrounded by land
纵向
2
Largest hot desert in the world
3
Land surrounded by water
4
Low-lying land surrounded by higher ground
5
Area where water covers the soil
6
Region near the equator
9
Wearing away of land by water or wind
10
Chain or group of islands