横向
1
Line dividing two countries
4
Low-lying land surrounded by higher ground
5
Chain or group of islands
7
Raised area of land, smaller than a mountain
8
Deep narrow valley with steep sides
10
Goods sold to another country
11
Ocean between Americas and Europe/Africa
纵向
2
Region near the equator
3
One of seven major landmasses
6
Largest ocean on Earth
9
Steep rock face at edge of land
12
Flat elevated area of land