一般而言，可转换公司债券利率低于普通公司债券利率，企业发行可转债券有助于降低其筹资成

某投资者2002年准备投资购买股票，现有A、B两家公司可供选择，从A、B公司2001年12月31日的有关会计报表及补充资料中获知，2001年A公司发放的每股股利为5元，股票每股市价为40元；2001年B公司发放的每股股利为2元，股票每股市价为20元。预期A公司未来5年内股利恒定，在此以后转为正常增长，增长率为6%；预期B公司股利将持续增长，年增长率为4%；假定目前无风险收益率为8%，市场上所有股票的平均收益率为12%，A公司股票的β系数为2，B公司股票的β系数为1.5。 要求： (1) 通过计算股票价值并与股票市价相比较，判断两公司股票是否应当购买。 (2) 若投资购买两种股票各100股，该投资组合的预期收益率为多少 (3) 计算该投资组合的综合β系数。

收尘器出口的粉尘浓度为（）

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     We work hard  to be leadingamong the rare book dealers withworld class customer service. Our

specialties include rare books, signed books, and first editionswidely acknowledged as unique and

highly collectible treasures. Landmark Works over five centuries, signed by author or illustrator, limited

editions for the collector. Many of these old books have been handcrafted and are bound in fine leather.

If you are looking for the very special, old, rare or Miracle on 34th Street lst Edition, lst Print Valentine

Davies, $1 460signed copy as a gift or to reward yourself, you might specifically consider first editions

under Signed First Print, Adventure, or Famous People.

     As many of us are getting ready for the Christmas Season, our books include Gift Ideas in all fields.

Future specials will include a presentation of James Bond titles.

    You are welcometo review our categoryof old,  signed,  rare,  and out-of-print titles.  If youcan't find

the copy you are looking for, please contact us  and ask us to help locate a title for you.                            

     The Christmas Nutshell Library lst  Edition HilaryKnight, $700. Books provide us with information

and knowledge, facts or fiction, antique novels or signed autobiographies of famous people. They can

make us happy, sad, smart...they educate us in so many different ways.

     What have you learned today? Discover a signed first edition. Own a piece of golf history autographed (签 名)  by one of the famous people in the world.

     Eloise at Christmas time lst Edition, lst Print Kay Thompson, $ 620 Our Story How to Contact Us

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对于现场液体泄漏应及时进行（）、稀释、收容、处理。

A.覆盖

B.填埋

C.烧毁

D.回收