横向
1
Person who buys and sells goods
4
Relating to the Middle Ages
5
Metal that replaced bronze in tools
6
Belonging to a very old period
11
Ancient Mesoamerican civilization
12
Deadly epidemic disease
13
Advanced stage of human society
14
Ancient Egyptian picture writing
15
Legislative body in ancient Rome
纵向
2
Long and distinct period of history
3
Movement of people to new areas
7
Legislative assembly of a country
8
Government by the people
9
Period of one hundred years
10
Object made by humans from the past