横向
1
Large area covered with trees
5
Flat grassland in tropical regions
6
Deep narrow valley with steep sides
7
Ocean between Americas and Europe/Africa
8
Imaginary line around the middle of Earth
10
Where river meets the sea
11
Cold treeless Arctic plain
纵向
2
Line dividing two countries
3
Region between the two tropic lines
4
Physical features of land
9
Body of water surrounded by land
12
Height above sea level