横向
1
Succession of rulers from same family
5
Alloy of copper and tin used in early tools
6
Armed entry into another territory
7
Ancient Mesoamerican civilization
8
Metal that replaced bronze in tools
9
Movement of people to new areas
10
Sudden overthrow of a government
11
Payment made to show submission
13
Person owned as property
纵向
1
Government by the people
2
Practice of farming and growing food
3
Territory controlled by another country
4
Object made by humans from the past
10
Government elected by the people
12
Advanced stage of human society