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假设MC、LTC、AC、AVC曲线分别代表边际成本曲线、长期成本曲线、平均成本曲线和平均可变成本曲线，则在下列几种曲线中，具有U型特征的曲线有( )。
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假设ACAVC和MC分别表示平均总成本平均可变成本和边际成本则完全竞争市场的短期供给曲线为
AVC大于或者等于MC中的那部分AVC曲线
MC大于或者等于AVC中的那部分MC曲线
AC大于或者等于MC中的那部分AC曲线
MC大于或者等于AC中的那部分MC曲线
假设ACAVCAFC和MC分别表示平均成本平均可变成本平均固定成本和边际成本当AC曲线达到最低点时下
MC=AVC
MC=AC
MC=AFC
AFC=AVC
假设MCLTCACAFCAVC曲线分别代表边际成本曲线长期成本曲线平均成本曲线平均固定成本曲线和平均
MC
LTC
AC
AVC
AFC
假设MCMPAVCAC分别表示边际成本边际产量平均可变成本平均成本MC曲线达到最低点时则
MP最大
MP最小
AVC最小
AC最小
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