问题 问答题 简答题

压缩机曲轴箱内有敲击声的原因是什么?应如何处理?

答案

参考答案:(1)轴瓦松动或磨损。

(2)曲轴磨损。

(3)十字头与滑道间隙大。

(4)十字头销和连杆螺丝松。

(5)断油、传动部分烧。

阅读理解

阅读理解

     Newspapers are one method of bringing the news to the public. Reporters, photographers,

correspondents, and editors are some of the people who create newspapers. They are known as

journalists.

      Reporters are journalists who go out and get the news. They attend meetings. They cover events

such as court cases, plays, and sporting events. They interview people to get their views about what

is going on. Reporters must be able to write a story quickly so as to meet a deadline. People do not

want to read old news. They want to know what is going on as soon as it happens. Reporters

sometimes phone or email their notes and quotations (引用语) to the paper from the scene. A

reporter in the office then writes the story.

     A "stringer" is a parttime reporter who works when called on. A fire might break out in one part

of town. An editor may ask a stringer who lives near the scene to cover the story.

Reporters  often  work  with  photographers, or photojournalists. Photojournalists take the pictures

that illustrate  (图解) the stories in a newspaper. They have to edit their pictures in time for them to

appear with the story.

     A correspondent is a journalist who covers the news in a particular place or on a subject that he

or she has special knowledge in. Large newspaper groups have correspondents in foreign countries

to report the news there. A paper may have a correspondent who covers just medical news.

     An editor is a journalist who works at a desk in a newspaper office. Editors prepare the reporters'

stories to be printed in the paper. They decide which story is most important and gets the frontpage

headline. They decide which pictures to use. Editors do not often write the news, but they do write

editorials (社论) in which they state their views on a topic or an issue.

     People who work as journalists have some things in common. They are curious, they like to write,

and they have a "nose for news". They can spot news as it happens. They know what people want to

read about.

1. The underlined word "They" in Paragraph 2 refers to________.

A. readers  

B. journalists      

C. reporters  

D. stringers

2. According to the passage, both the reporter and the editor________.

A. usually work in the office          

B. decide which pictures to use

C. have the ability to discover news    

D. often write editorials for their paper

3. The passage is mainly written to________.

A. introduce different posts and duties of journalists

B. describe the characters of journalists

C. explain how the news is collected            

D. show how reporters work

4. Which of the following shows the structure of the passage?

CP:Central Point   P:Point Sp:Sub­point (次要点)   C:Conclusion

单项选择题 B1型题