建筑高度超过( )m的建筑，宜采用垂直串联供水方式。 A．40 B．50 C．

某公司持有甲、乙两种股票构成的证券组合，β系数分别为2.0和3.0，两种证券各占 50%。无风险收益率为7%，市场上所有股票的平均报酬率为11%。若该股票为固定成长股，成长率为7%。已知该公司上年的每股股利为2元。
要求计算：
(1) 确定证券组合的β系数。
(2) 确定证券组合的风险收益率。
(3) 确定证券组合的必要投资收益率。

A person, like a commodity, needs packaging. But going too far is absolutely undesirable. A little exaggeration(夸张) will do no harm when it shows the person’s unique qualities to their advantages. To show personal attractiveness in a casual and natural way, it is important for one to have a clear knowledge of oneself. A skilled packager knows how to add art to nature without any signs of embellishment so that the person so packaged is not a commodity, but a human being, lively and lovely.

A young person, especially a female, shining with beauty and full of life, has all the favor granted. Youth however, comes and goes in a flash. Packaging for the middle-aged is primarily to hide the marks made by years. If you still enjoy life enough to keep self-confidence and work at pioneering work, you are unique in your natural qualities, and your attractiveness and grace will remain. Elderly people are beautiful if their river of life has been, through plains, mountains and jungles, running its course as it should. You have really lived your life, which now arrives at a self - satisfied stage of quietness and calmness with no interest in fame or wealth. There is no need to make use of hair dyeing. The snow-capped mountain itself is a beautiful scene of fairyland. Let your looks change from young to old in step with the natural ageing process so as to keep in harmony with nature, for harmony itself is beauty, while the other way round will only end in unpleasantness. To be in the company of the elderly is like reading a thick book of good edition, which attracts one so much that one is unwilling to part with it. As long as one finds where one stands, one knows how to package oneself, just as a commodity sets up its brand by the right packaging.

小题1:The underlined word in the first paragraph is closest to the word ______ in meaning.

A．decoration

B．clarification

C．movement

D．identification小题2:It can be concluded from the text that ______.

A．people should be packaged at all ages

B．people should be packaged in a special way

C．elderly people also care about packaging

D．proper packaging makes people attractive小题3:For the middle-aged, attractiveness ______ .

A．hardly exists

B．is the strongest

C．comes from the inside

D．comes from the appearance小题4:According to the author, if you want to keep in harmony with nature, you should ______.

A．dye your hair

B．make up at a young age

C．follow the ageing process

D．give up fame and wealth小题5:The underlined sentence means that elderly people ______.

A．are usually packaged like a finely-made book

B．experience a lot and have rich knowledge of life

C．do a lot of traveling and can give you much information

D．enjoy reading thick books about beautiful nature and fairyland

语音信息在进行数字化时，使用的取样频率一般为 ( )

A．44.1 kHz

B．16kHz

C．4kHz

D．8kHz

关于隐性课程，下列说法不正确的是（）。

A.不在培养方案中反映

B.不通过正式的教学进行

C.对学生有潜移默化的作用

D.显示在课程表上

肠瘘多发生在手术后的时间是（）

A.术后1天

B.术后3天

C.术后5天

D.术后1周

E.术后2周