1. Barter system (Barter System)
is the goods exchanged between the requirements, such as the matching rice for pig. The eggs for fish, practical problems and obstacles arise several, including
1.The needs of people do not match 2,
. The problem about the exchange rate or price
3.? The problem about transport
4.? The problem about keeping
5.? The problem about the loan and settlements
6.The problem about something separate units not
.
การแปล กรุณารอสักครู่..
