古代美洲文明贸易问题

题目

古代美洲文明贸易问题
1.What was traded?Why?(supply and demand)
2.What technology was needed and how did they obtain it?
3.What other things are being exchanged?(disease,goods and ideas)
4.What started the exchange?(social,religious,or political pressures)
5.What was the most significant item of the exchange?(item or idea)
6.How was the world changed by trade?
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答案

1.Because the production capability,has not yet been invented money,so the the main way of ancient American trade is barter.2.As everyone knows,wheels and horses.But the ancient America without these ...