横向
1
Exchange of goods between peoples
3
Advanced stage of human society
4
Deadly epidemic disease
5
Government elected by the people
6
Ancient Mesoamerican civilization
9
Medieval land-for-service system
纵向
2
Ancient Egyptian picture writing
6
Person who buys and sells goods
7
Ancient Egyptian stone monument
8
Practice of farming and growing food
10
Alloy of copper and tin used in early tools