单项选择题

If one had to save products instead of money,______

A．this would need years of practice
B．coal, for example, would lose its value
C．they could not be stored for years on end
D．many products would lose their value

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热门试题

单项选择题

A barter economy is one in which______

A．value is decided by weight
B．value is decided by number
C．money is used and goods are not exchanged
D．goods are exchanged an, d money is not used

单项选择题

Using money as a medium of exchange means that______

A．you have to sell something in order to buy something
B．you have to buy something in order to sell something
C．you don't have to buy something in order to sell something
D．the seller and the purchaser are the same person