问题 填空题

FTP协议是Internet常用的应用层协议,它通过 (51) 协议提供服务,它是基于Client/Server结构通信的,作为服务器一方的进程,通过监听 (52) 端口得知有服务请求,在一次会话中,存在 (53) 个TCP连接。另一个简单的文件传输协议 (54) ,它的特点是使用UDP协议,而且 (55)

55()

答案

参考答案:代码占用内存小

解析:

FTP是基于TCP实现的文件传输协议,使用此协议进行文件传输时,FTP客户和服务器之间建立的连接是控制连接和数据连接,用于传输文件的是数据连接。FTP的默认服务端口为21。在一次FTP会话中存在两个TCP连接控制连接和数据连接。TFTP是基于UDP实现的简单文件传输协议,它共有五种数据单元PDU,其中数据PDU一次可以携带的数据最多是512B,当传输的文件长度恰好是其整数倍时,则文件传输完毕后,还必须最后发送一个无数据的数据PDU。TFTP的特点是代码占用内存小。

阅读理解

Forgiving someone who has hurt you or let you down is never an easy thing. Several new studies, however, say that it could have a lot of health benefits. When you think of forgiveness, you probably don’t think of it as being a health or medical problem. Studies from Stanford University, on the other hand, show that something like anger can change your well-being.

When cartoon book characters like the Incredible Hulk get angry, they change colours and often gain special power. In the real world, anger is less obvious and may be more dangerous. That’s why Professor Fred Luskin, founder of the Stanford Forgiveness Project and author of Forgive for Good, says holding on to anger and hatred can harm your physical and mental health. Two new studies seem to show the same idea.

The studies find that people who are able to forgive feel less stress, less back pain, and less depression. They also have fewer headaches, lower blood pressure, and fewer problems on sleeping.

So it doesn’t matter if your anger is caused by the traffic or other things. Learning to let it go is important. Techniques such as deep breath or thought can help. Or just ask yourself if it’s worth hurting yourself by staying angry with someone else.

Forgiveness does not mean that you simply accept what happened and say it’s OK. Instead, it’s a way of making peace with yourself about what happened in the past.

小题1: The author of the passage tries to make his viewpoint clear ______.

A.by raising his own examples

B.based on his own experience

C.by mentioning some studies

D.by mentioning some typical patients小题2: The example of the cartoon book characters is taken in the passage to______.

A.support the viewpoint that anger and hatred harm physical and mental health

B.introduce a famous expert

C.let the reader know the different colours of cartoon faces

D.show how to control one’s temper小题3:The underlined phrase“holding on to”in this passage possibly means“______”.

A.removing

B.keeping up

C.getting rid of

D.learning about小题4: Which of the following is NOT mentioned in this passage?

A.People who are able to forgive feel less stress.

B.People who are able to forgive feel less depression.

C.People who are able to forgive have fewer problems on sleeping.

D.People who are able to forgive feel less tired.小题5:The best title for this passage is probably _______.

A.Forgiveness

B.Forgiveness Is Good for Health

C.A Secret to Keeping Health

D.Anger Is Bad for Health

单项选择题