横向
1
Metal that replaced bronze in tools
3
Military blockade of a fortified place
4
Ancient Mesoamerican civilization
5
Government by the people
6
Territory controlled by another country
9
Freedom from outside control
11
Ancient Egyptian ruler
13
Fundamental law of a nation
纵向
2
Practice of establishing foreign colonies
7
Period of ten years
8
Person owned as property
10
Alloy of copper and tin used in early tools
12
Union formed for mutual benefit
14
Exchange of goods between peoples