我一开始所有的值都输入正确，但是结果就是有偏差。是不是第一次使用的金融计算器要把P/Y初始成1，PMT初始成0，计算的值才不会有偏差？ https://zhidao.baidu.com/question/562593147781002924.html。

请问18题为什么是long呢，

1906基础段视频中提到VER类似与Import quota, 为什么VER导致更大的welfare loss?

老师，理论上，B和C一样，市值也是一样时刻变动，为什么优先选B

请问百题的讲义在哪里下载？

Company A and B operate in the same line of business and have the same degree of operating leverage. The Company A has no debt while the Company B has 50 percent debt in its capital structure. Which of the following statements is most accurate? Compared to the Company A, the Company B has: A A lower sensitivity of net income to changes in unit sales. B The same sensitivity of net income to changes in operating income. C The same sensitivity of operating income to changes in unit sales. 老师，您好，这个题怎么理解，

老师说“型I错误和型II错误可以同时犯”，这怎么可能呢？意思是P(I)和P(II)可以同时不为0么？

老师您好，第12题怎么做

1. trust manager信托经理是什么意思？ 2. family of funds意思是western fund的所有基金吗？ 3. service fee class of fund是什么意思？ 4. rough performance意思是业绩差？

如何判断右偏和左偏图形的mode、median、mean的大小关系？怎么记住？