问题 问答题 简答题

在令牌总线中,如果某一个站点在接到令牌后随即崩溃,将会出现什么问题?应如何解决所出现的问题?

答案

参考答案:

当令牌持有站出现崩溃时,就会造成令牌丢失,其表现是总线没有站点发送数据。每个站点利用不活动计时器来计算总线空闲的时间,每当总线上出现信号时即复位计时器,而当计时器超时时,即发送一个“Claim_Token”控制帧,进行初始化。

阅读理解

Carly Williams decided to become a TV reporter when she was in Grade 6. “ One day, we went out into forest and did some reporting about forest fires,” Carly said. “ Ever since then, I have loved the job and I have been trying to do it as much as I can.”

Now 15, Carly reports for the news program at her school. And she has interviewed many famous people including some famous basketball players and TV stars.

“Carly is a great student and I am sure she will achieve her dream in the future,” said one of Carly’s teachers.

Last month the happiest thing for Carly was that she got a call from Teen Kids News in New York. She sent them some films she made by herself for the school news program. Teen Kids News is on over 200 TV stations around the USA. The producer of the show said he liked Carly’s films and asked if Carly would make a film for them.

“ All I could say was, yes, yes, yes!” Carly said. “ I didn’t even think for a second.”

Carly spent five days learning something about Teen Kids News in New York. She also visited a person who was a reporter for Teen Kids News and got some advice.

Her first task was to interview an artist in New York. Carly said she worried about working with a new team because she wanted to impress the producer. Although under great pressure, she did a wonderful job.

“Carly has gotten to do some pretty amazing things,” said Carly’s mother. “For her to get that taste of it was pretty cool.”

小题1:Which thing helped Carly decide to be a TV reporter?

A.The task to interview an artist in New York.

B.Her report about forest fires when in Grade 6.

C.Her interviews with many famous people.

D.The exciting words from one of her teachers.小题2:Last month Carly was very happy because __________.

A.she was asked to make a film for Teen Kids News

B.she did a wonderful job for the school news program

C.she sent some of wonderful films to Teen Kids News

D.she visited a reporter in New York and got some advice小题3:Why was Carly worried when doing first task?

A.Her mother asked her not to do it.

B.She wanted to interview a producer.

C.She wanted to impress the producer.

D.She doesn’t want to work with a new team.

问答题 简答题