NO.PZ2023061903000100
问题如下：
Q. Companies most likely have a well-defined supply function when the market structure is:选项：
A.oligopoly. B.perfect competition. C.monopolistic competition.解释：
B is correct. A company in a perfectly competitive market must accept whatever price the market dictates. The marginal cost schedule of a company in a perfectly competitive market determines its supply function.
B正确。在完全竞争市场中，公司必须接受市场决定的任何价格。完全竞争市场中企业的边际成本决定了企业的供给函数。
除了perfect competition 其他都没有可以确定地supply curve吗
