返回信息流5 The cost of raw materials will fall under the category of:
a. fixed costs.
b. variable costs.
c. long-run costs.
d. average fixed costs.
6.The lease payments made by a firm fall under the category of:
a. fixed costs.
b. variable costs.
c. short-run costs.
d. average fixed costs.
这是一条镜像帖。来源：北邮人论坛 / economics / #9595同步于 2011/5/10
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