横向
1
Relating to the Middle Ages
5
Ancient Mesoamerican civilization
6
Succession of rulers from same family
8
Exchange of goods between peoples
9
Period of ten years
纵向
2
Advanced stage of human society
3
Ancient empire that conquered much of Europe
4
Long and distinct period of history
7
Ancient Egyptian ruler
10
Person who buys and sells goods
11
Government ruled by a king or queen
12
Military conflict or fight