Mr. B needs to report to the management of L Group.regarding the value analysis (价值分) of Company Y. As the assistant of Mr.B, you have been required by Mr.B to prepare a draft of the analysis. Mr.B has asked you to follow the following steps in drafting the analysis：(1) what does WACC(加权平均资本成本) stand for and what are the factors that would increase or decrease WACC;(2) calculate the equity value (股权价值)of Company Y with the information provided in Table 6-1;showing the step-by-step calculation process;(3) compare the calculated equity value and the stock price (value is over-or under-estimated (股价) to conclude whether the calculated equity assuming that the stock price represents a fair value);(4) what are the reasons that may cause the over-or under-estimation in equity value.

2007年7月1513，某亚麻厂正在生产的梳麻车间、前纺车间和准备车间的联合厂房突然发生亚麻粉尘爆炸起火。一瞬间，停电停水，当班的477名职工大部分被围困在火海之中。经及时抢救，多数职工脱离了危险区。

该厂的除尘系统采用布袋除尘，金属管道输送亚麻粉尘。事故导致整个除尘系统遭受严重破坏，部分厂房倒塌，地沟盖板和原麻地下库被炸开，车间内的大部分机器和电气设备损坏，企业停产。事故造成死亡35人、重伤5人、轻伤12人，直接经济损失800多万元。

下列关于亚麻粉尘的爆炸危害和后果的说法，正确的有（）。

A.粉尘浓度越大，爆炸威力越大

B.粉尘分散度越小，爆炸威力越大

C.爆炸能量与粉尘活性有关

D.爆炸能量与粉尘粒度无关

E.爆炸产生的后果与厂房结构有关