横向
1
Largest ocean on Earth
4
One of seven major landmasses
8
Half of the Earth
10
Landform where river meets the sea
纵向
2
Mountain that can erupt with lava
3
Vast body of salt water
4
City that is seat of government
5
Cold treeless Arctic plain
6
Area where water covers the soil
7
Distance east or west of prime meridian
9
Goods sold to another country