Beta估值怎么算，没学过，听不懂，麻烦解析一下。

凯派模型之前没有学习，他表示什么啊？？rm是什么？？以及系统风险分散？？

R=P*Q这里的R是什么？是利率嘛？

F=28/4=7这两个数字是怎么来的？

为什么Qd/Px=6.390？

为什么不选防火墙

The basketball club’s marginal cost is fixed at $2 per visit，边际成本是什么意思？

MARU S.A. de CAT., a Mexican corporation that follows IFRS, has elected to use the revaluation model for its property, plant, and equipment. One of MARU's machines was purchased for 2,500,000 Mexican pesos (MXN) at the beginning of the fiscal year ended 31 March 2010. As of 31 March 2010,the machine has a fair value of MXN 3,000,000. Should MARU show a profit for the revaluation of the machine? 这题的答案，C为什么不对？ B No, because this revaluation is recorded directly in equity. C No, because value increases resulting from revaluation can never be recognised as a profit.

融资成本为什么是百分数的形式，融资成本不是一个金额呢？？

老师，旮差是什么意思？