横向
1
Government by the people
5
Metal that replaced bronze in tools
6
Military blockade of a fortified place
10
Armed conflict between nations
11
Period of one hundred years
12
Alloy of copper and tin used in early tools
纵向
2
Ancient Egyptian ruler
3
Exchange of goods between peoples
4
Practice of farming and growing food
7
Ancient empire that conquered much of Europe
8
Armed entry into another territory
9
Ancient Mesoamerican civilization