横向
1
Alloy of copper and tin used in early tools
3
Belonging to a very old period
4
Metal that replaced bronze in tools
5
Ancient empire that conquered much of Europe
6
Object made by humans from the past
7
Sudden overthrow of a government
8
Period of ten years
纵向
2
Armed conflict between nations
3
Union formed for mutual benefit
4
Freedom from outside control
9
Person owned as property