【简答题】In ancient times wealth was measured and exchanged in things that could be touched: food ,tools, and previous metals and stones. Then the barter system was replaced by coins, which still had real valu...
【简答题】In ancient times wealth was measured and exchanged in things that could be touched: food, tools, and precious metals and stones. Then the barter system was replaced by coins, which still had real valu...
【简答题】In ancient times wealth was measured and exchanged in things that could be touched: food ,tools, and previous metals and stones. Then the barter system was replaced by coins, which still had real valu...