(本题满分14分) 制订投资计划时,不仅要考虑可能要获得的盈利,而且要考虑可能出

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问题:

(本题满分14分)

制订投资计划时,不仅要考虑可能要获得的盈利,而且要考虑可能出现的亏损.某投资人打算投资甲、乙两个项目,根据预测,甲、乙项目可能的最大盈利分别为100%和50%,可能的最大亏损率分别为30%和10%,投资人计划投资金额不超过10万元,要求确保可能的资金亏损不超过1.8万元,问投资人对甲、乙两个项目各投资多少万元,才能使可能的盈利最大?

考点:简单线性规划问题(用平面区域表示二元一次不等式组)
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     Reading newspapers has become an important part of everyday life. Some people read newspapers as the first thing

to do in the morning. Others read newspapers as soon as they have free time during the day so that they can learn what

is happening in the world.

     Sometimes,we do not have enough time to read all the news carefully, so we just take a quick look at the front page.

At other times,we may be in such a hurry that we only have a few minutes to look at the headlines of the passage .

     Newspapers can be found everywhere in the world.We can get many different kinds of newspapers in big cities,but

in some mountain villages we can see few newspapers.

     Some newspapers are published (也版) once a week,but most of the papers are published once a day with many

pages,some even published twice a day!You know different people enjoy reading different newspapers.Some like

world news, and others prefer short stories.They just choose what they are interested in.

     Today newspapers in English have the largest numbers of readers in the world. The English language is so popular

that many Chinese students are reading English newspapers such as China Daily or 2lst Century. Also they bring us

more and more information with Internet.

1. People read newspapers in order to _____.

A. learn the latest news

B. meet their own different needs

C. read the short stories

D. find the morning news

2. From the passage we can see that_____when people get newspapers.

A. they read them very carefully

B. they just read the headlines

C. not everyone reads all the pages

D. they have no time to read them

3. Newspapers have so many pages because_____.

A. more and more people like to read them

B. people enjoy reading something different

C. newspapers become cheaper

D. more pages mean more money

4. Newspapers_____are the most popular in the world.

A. in English

B. in Chinese

C. in other language

D. in the many pages

5. According to the passage, besides newspapers, people also get information from_____.

A. magazines

B. advertisements

C. e-mails

D. Internet

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假定某企业2011年的税后收益为50万元,支出的利息费用为20万元,其所得税税率为35%,且该年度其平均资产总额为l80万元,则其资产回报率(ROA)约为()

A.33%

B.35%

C.37%

D.41%

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