横向
1
Relating to the Middle Ages
3
Ancient Mesoamerican civilization
5
Alloy of copper and tin used in early tools
6
Person who travels to discover new lands
9
Succession of rulers from same family
10
Fortified medieval residence
12
Long and distinct period of history
纵向
2
Sudden overthrow of a government
3
Government ruled by a king or queen
4
Exchange of goods between peoples
7
Military blockade of a fortified place
8
Large territory under one ruler
11
Ancient Egyptian stone monument