横向
1
Military blockade of a fortified place
4
Period of ten years
5
Metal that replaced bronze in tools
6
Long and distinct period of history
7
Person who buys and sells goods
10
Government elected by the people
纵向
2
Object made by humans from the past
3
Exchange of goods between peoples
8
Alloy of copper and tin used in early tools
9
Movement of people to new areas