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问题 单项选择题

市场指数型基金的预期收益率是10%，标准差为10%，当前市场上无风险资产的收益率是4%，吕先生现有资金10万元，他能承受的最大风险的标准差为12%，最小的预期收益率为11%，如果其理财师准备用无风险资产和市场指数型基金为吕先生配置资产，则下列构建的资产组合中符合吕先生要求的是（）。

A．将2万元投资于无风险资产，将8万元投资于指数型基金 

B．将10万元全部购买指数型基金 

C．以4%的利率借入2万元，用全部12万元资金购买指数型基金 

D．以4%的利率借入2.5万元，将全部12.5万元投资于指数型基金

答案

参考答案：C

解析：

若投资于无风险资产和指数型基金的比例为w1和w2，由于客户能够承受的最大风险的标准差为12%，根据两种资产组合的标准差公式，代入数据后得到w2×10%≤12%，又由w1+w2=1，解方程得出w2≤1.2，w1≥-0.2；又因为最小预期收益率为11%，市场指数型基金的预期收益率为10%，无风险收益率为4%，资产组合的预期收益率为w2×10%+w1×4%≥11%，解方程得w2≥1.17。综上所得：1.17≤w2≤1.2，所以，A、B、C、D四种方案中，只有C符合客户的要求。

单项选择题

甲公司与乙公司订立一书面合同，甲公司签字盖章后邮寄给乙公司签字盖章，该合同的成立时间为( )

A．甲公司与公司口头协商一致时

B．甲公司签字盖章时

C．甲公司签字盖章后交付邮寄时

D．乙公司签字盖章时
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阅读理解

阅读理解。

                                                       Stamps for the white Olympics 

    The Winter Olympics is also called the White Olympics. At this time, many colorful stamps are published

(发行) to mark (标志) the great Games. The first stamps marking the opening came out on January 25, 1932

in the United States for the 3rd White Olympics. From then on, Publishing stamps during the White Olympics

became a rule. (规定) 

    During the 4th Winter Olympic Games a group of stamps were published in Germany in November 1936.

The five rings of the Olympics were drawn on the front of the sportswear. It was the first time that the rings

appeared on the stamps of the White Olympics.

    In the 1950s, stamps of this kind became more colorful. When the White Olympics came, the host

countries (东道国) as well as the non-host countries published stamps to mark those Games. China also

published four stamps in February 1980,when Chinese sportsmen began to take part in the White Olympics.

    Japan is the only Asian country that has ever held the White Olympics. Altogether 145 million stamps were

sold to raise (筹集) money for this sports meet.

    Different kinds of sports were drawn on these small stamps. People can enjoy the beauty of the wonderful

movements of some sportsmen.

1. The White Olympics and the Winter Olympics            . [ ]

A. are the same thing

B. are different games

C. are not held in winter

D. are held in summer

2. The world made it a rule to publish stamps to mark the great world Games            . [ ]

A. after the year 1936

B. after the 3rd White Olympics

C. before the 3rd White Olympics

D. before the year 1932

3. The Winter Olympics is held once            . [ ]

A. every two years

B. every three years

C. every four years

D. every five years

4. Which of the following is true? [ ]

A. Only the host countries can publish stamps to mark those Games

B. Only the non-host countries can publish stamps to mark those Games

C. All countries can publish stamps to mark those Games

D. Japan can't publish stamps to mark those Games

5. What may appear on the stamps of the White Olympics? [ ]

A. Basketball

B. Table tennis

C. Football

D. Skating

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