横向
1
Belonging to a very old period
2
Ancient Mesoamerican civilization
4
Alloy of copper and tin used in early tools
7
Military blockade of a fortified place
8
Advanced stage of human society
9
Object made by humans from the past
10
Armored warrior of medieval times
纵向
2
Person who buys and sells goods
3
Long and distinct period of history
5
Metal that replaced bronze in tools
6
Fundamental law of a nation