横向
1
Military blockade of a fortified place
4
Metal that replaced bronze in tools
5
Person who buys and sells goods
6
Sudden overthrow of a government
7
Government ruled by a king or queen
9
Long and distinct period of history
纵向
2
Advanced stage of human society
3
Belonging to a very old period
8
Ancient empire that conquered much of Europe
10
Practice of farming and growing food