A-A+
A barter economy is one in which ______.A．valu
问题详情
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 and money is not used
参考答案
正确答案：D
解析：文章第二段谈到了以物易物的交换经济(barter economy)是费时的事，很难决定多少盘子能换一百磅的棉花，或多少钢笔能换一吨煤，因此选D，其余三个选项与题意不符。
