6题。想问下这种题咋判断属于哪个啊。讲义上粗略写了一下这些名词，也没有说里面包括啥

如果不是100%通过public source获得前client的联系方式呢？比如经过到两方都认识的人?

这个公式的知识点在PPT哪一页呢

我想确认一下，cogs是不是只是在i/s表格里面呀，不在资产负债表格里面对吧

老师，第二题是怎么个算法啊。为什么我这样算不对

33题

老师，37题我觉得AB都对，同质预期那一块不是讲了这是一种消极投资策略吗。那为什么不能选B

为什么多项分布和实验有关系，和选择无关？

8 A cyclical company is most likely to:A have low operating leverage.B sell relatively inexpensive products.C experience wider-than-average flutuations in demand.老师，这一题A为啥错？原版书找到这段话，”Such companies experience wider-than-average fluctuations in demand—high demand during periods of economic expansion and low demand during periods of economic contraction—and/or are subject to greater-than-average profit variability related to high operating leverage (i.e., high fixed costs).“，这里的意思是说周期性公司具有高经营杠杆吗？

6 Which of the following statements about commercial and government industry classification systems ismost accurate?A Many commercial classification systems include private for-profit companies.B Both commercial and government classification systems exclude not for-profit companiesC Commercial classification systems are generally updated more frequently than government classification systems老师，1. 原版书哪里有提到商业行业分类体系只包含公开上市、营利性企业？2. 商业和政府行业分类体系的对比有哪几点老师可以列一下吗？