问题 单项选择题 共用题干题

An internet is a combination of networks connected by (1). When a datagram goes from a source to a  (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a  (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?

空白(1)处应选择()

A.modems

B.routers

C.switcher

D.computers

答案

参考答案:B

解析:

互联网是由不同的网络通过路由器互联起来的。当数据包从源地发往目的地时,在到达目的地网络之前它可能经过多个路由器。路由器从一个网络接收到数据包之后就转发到另外一个网络。然而,一个路由器往往与几个网络连接,当路由器接收到一个数据时,它应该将数据包传向哪个网络呢?这将基于路径最优化决策。

阅读理解

Children, especially boys, tend to idealise their fathers when they are young.Every little boy wants to grow up to be just like his father, and every little girl thinks her father is the smartest man on the earth. It’s not very easy to be a good father, but it’s not that difficult either. Children will truly enjoy spending time with their fathers, not just when they are kids, but even when they are adults.

Not all children communicate well with their fathers. Communication is often left to mothers, while fathers dispense advice as and when necessary. Don’t expect all conversations to centre around the dinner table. Go to your children’s bedrooms and talk to them about school, their teachers or their friends. Remember that the conversation cannot be one-sided. When your children open up to you, you also need to open up to them.

If your children come home from school feeling upset, go up to them and ask them what is the matter. And if it is something which seems to you to be a silly reason to be upset, don’t voice your opinion. It may be silly to you, but to your children it is important enough. So don’t wave the topic away by telling them not to bother about such stupid things. Simply discussing their problems with them will help them feel better.

Don’t shy away from having discussions about your teenage children’s love lives. Generally speaking, your children are definitely not going to discuss intimate details with you. Try to let them know that you are relaxed about topics on love. Tell your children how you met your wife. It is perfectly normal for children to go through feelings for the opposite sex as they grow up, and by keeping the topic closed for discussion, you are only shutting them off from discussing their feelings with you. All they will do is turn to their friends.

小题1:To children their fathers are usually very ______.

A.important

B.great

C.serious

D.strong小题2:From the second paragraph we can know that ______.

A.some children don’t like their fathers at all

B.talking with children around the dinner table is bad

C.it is better for mothers to communicate with their children

D.mothers usually communicate better with their children.小题3: Suppose your children are worried about something you should _____.

A.have a talk with them

B.express your option

C.keep silent

D.let them alone小题4:Your children would not like to discuss their love lives with you probably

because they think__________.

A.you are relaxed about topics on love

B.they should ask for help from their friends

C.they have already grown up

D.it is not normal to experience feelings of love

填空题