问题 判断题

按照投资组合理论,每个投资者持有同一个风险证券组合的可行域。()

答案

参考答案:

解析:由于一种证券或组合在均值标准差平面上的位置完全由该证券或组合的期望收益率和标准差所确定,并假定所有投资者对证券的收益、风险及证券间的关联性具有完全相同的预期,因此,同一种证券或组合在均值标准差平面上的位置对不同的投资者来说是完全相同的。由此可见,所有投资者在均值标准差平面上面对完全相同的证券组合可行域。

阅读理解

阅读下面短文,根据短文内容完成下面表格。

     Dreams may be more important than sleep. Some people don't need much sleep. But we all need to dream,

scientists say.

     (A) Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams

are like short films. They are usually in color. Some dreams are like old films. They come to us over and over

again. That may be because the dreamer is worrying about something.

     Dreaming may be a way of trying to find an answer. Some people get new ideas about their work from

dreams. They could have been thinking about their work all day. These thoughts can carry over into dreams.

     Sometimes we wake up with a good feeling from a dream. But often we can't remember the dream. Dreams

can disappear quickly from memory. (B) The more we sleep, the longer we dream. Too much dreaming can be

harmful. The mind is hard at working when we dream. That is why we may have a long sleep and still wake up

tired.

1. Are dreams very important to us? (简要回答)

    ____________________________________________________________________

2. According to the author(作者), what are dreams like?(简要回答)

    ____________________________________________________________________

3. Why do we sometimes still feel tired after a long sleep? (简要回答) 

    ____________________________________________________________________

4. 将文中的句子(A)译成汉语。 

    ____________________________________________________________________

5. 将文中的句子(B)译成汉语。 

    ____________________________________________________________________

单项选择题 A1型题