横向
1
Flat grassland in tropical regions
6
One of seven major landmasses
7
Goods sold to another country
8
Imaginary line around the middle of Earth
10
Visual representation of an area
11
Seasonal heavy rainfall
13
City that is seat of government
纵向
2
Mountain that can erupt with lava
3
Deep narrow valley with steep sides
4
Vast body of salt water
5
Largest river in South America
9
Region near the equator
12
Region surrounding the North Pole