横向
1
Sudden overthrow of a government
6
Ancient Mesoamerican civilization
7
Ancient empire that conquered much of Europe
8
Territory controlled by another country
9
Metal that replaced bronze in tools
10
Freedom from outside control
11
Military blockade of a fortified place
13
Long and distinct period of history
纵向
2
Belonging to a very old period
3
Formal agreement between nations
4
Advanced stage of human society
5
Government by the people
6
Person who buys and sells goods
12
Roman arena fighter