题目内容

已知某企业的产量为9单位时，总成本为95元，产量增加到10单位时平均成本为10元，由此可知边际成本为()

A. 5元
B. 3元
C. 10元
D. 15元

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关于LMC曲线，描述不正确的是()。

A. 当LMC B. 通过LAC曲线的最低点
C. 随LAC曲线的下降而下降
D. 呈U形变化

以下表述正确的一项是()

A. 在长期中所有成本都是固定的
B. 在长期中所有成本都是可变的
C. 在短期中所有成本都是固定的
D. 在短期中所有成本都是可变的

边际技术替代率递减规律与边际报酬递减规律之间的联系如何？请给出详细说明。

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