选择题:在短期中,当边际成本曲线位于平均成本曲线上方时,(  )。A.平均成本是递减的 B.平均成本是递增的 C.边际成本是递减的 D.边际成本保持不变

题目内容:

在短期中,当边际成本曲线位于平均成本曲线上方时,(  )。

A.平均成本是递减的 B.平均成本是递增的 C.边际成本是递减的 D.边际成本保持不变

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