主要是为维护无行为能力或限制行为能力人的利益而设立的代理方式是( )。A．委托代理

为了保证连接的可靠建立，TCP使用了______法。

在人体血液循环中，输送血液的“泵”是______．

阅读理解。

     Researchers have shown that music has an important effect on one's body and mind. In fact, there is a

growing field of health care known as Music Therapy, which uses music to treat diseases. Even hospitals

are beginning to use music therapy. This is not surprising, as music affects the body and mind in many

powerful ways.

     Researchers have shown that quick music can make a person feel more alert (警觉的), while slow music

can produce a calm, deep thinking state. Also, researchers have found that music can change brainwave

activity levels. This can help the brain to change speeds more easily on its own as needed, which means that

music can bring lasting benefits to your state of mind, even after you've stopped listening.

     Breathing and heart rate can also be influenced by music. This can mean slower breathing, slower heart

rate, and a relaxing response. This is why music and music therapy can help reduce the damaging effects of

long-term stress, greatly promoting not only relaxation, but health. Music can also be used to bring about a

more positive state of mind, by helping to keep worries away.

     Music has also been found to bring many other benefits, such as lowering blood pressure and reducing

the risk of strokes among others. It is no surprise that so many people are considering music as an important

tool to help the body become or stay healthy.

1. What can we know about music therapy? [ ]

A. It is a type of music.

B. It is a research about music.

C. It is a kind of disease affected by music.

D. It is a method of using music to help treat diseases.

2. According to the second paragraph, we can know that _____. [ ]

A. music with different speeds has different effects

B. quick music is not good for one's health

C. slow music can help one think more slowly

D. music will have less benefit after one stops listening

3. The reason why music can help deal with stress is that _____.[ ]

A. it is used by many hospitals

B. it can help change brainwaves

C. it is beneficial to breathing and heart rate

D. it can bring a more positive state of mind

4. The passage is mainly about _____. [ ]

A. the importance of music therapy

B. the benefits music can bring to treat diseases

C. a research on the effect of music

D. the diseases music can help to treat

( )是指能够随时变现并且持有时间不准备大于或等于1年的投资，包括股票、债券、基金等。

A．短期负债

B．短期投资

C．流动资产

D．流动负债

下图为铰链四杆机构，设杆A最短，杆B最长以d为机架。试用符号和式子表明它构成曲柄摇杆机构的条件：（）。