横向
1
Government elected by the people
5
Metal that replaced bronze in tools
6
Movement of people to new areas
7
Union formed for mutual benefit
9
Long and distinct period of history
12
Succession of rulers from same family
15
Legislative body in ancient Rome
纵向
2
Person who travels to discover new lands
3
Period of ten years
4
Sudden overthrow of a government
8
Territory controlled by another country
10
Ancient Egyptian ruler
11
Ancient Egyptian picture writing
13
Period of one hundred years
14
Formal agreement between nations