问题 问答题 简答题

根据调速工具的配置情况,有几种主要调速方式?

答案

参考答案:

1.点式调速:在溜放部分几个特定地点,设置减速器,仅在几个特定点能对车辆调速。

2.连续式调速:在整个溜放部分,连续设置调速工具(如减速顶),用它实现间隔和目的调速。这种调速方式,在车组溜放过程中能对其连续调速。

3.点连式调速:在溜放线上和调车线的入口处,设置减速器进行点式调速。在调车线上连续设置减速顶,进行连续调速。咽喉区的减速器用作间隔调速,调车线的减速器用作目的调速。

阅读理解

阅读理解

     Are you feeling blue? An American study suggests that being surrounded by happy friends and

neighbors could have more of an effect on your happiness than money. That is the finding of researchers

from Harvard University and the University of California at San Diego.

     Nicholas Christakis and James Fowler studied the emotional health of more than four thousand seven

hundred people. They used information from the Framingham Heart Study. That study began sixty years

ago in the American community of Framingham, Massachusetts. It was started to learn more about the

risks of heart attack and stroke. For the new study, the researchers examined the emotions of the men

and women in the Framingham Heart Study. The information was gathered from 1983 to 2003.

     The researchers found that friends of happy people had a greater chance of being happy themselves.

That means that happiness spreads, or has a contagious effect, among people. And, the smaller the

physical distance between friends, the larger the effect they had on each other's happiness. For example,

a person was twenty percent more likely to feel happy if his/her friend living within one and a half

kilometers was also happy. Having a happy neighbor who lived next door increased an individual's

chance of being happy by thirtyfour percent.The effects of friends' happiness lasted for up to a year.

     Another finding was that people who worked together or were married did not have as much of an

effect on happiness levels as friends did. The researchers said this was often true among friends of the

same sex. A report on the findings was published this month in the British Medical Journal.America's

National Institute on Aging helped to pay for the study. Some researchers who were not involved with

the study questioned its findings. They said the results could be disputed(争议) unless a separate study

showed similar findings.

1. What does this text mainly tell us?

A. How to live a happy life?

B. One's happiness influences others.

C. How to keep emotions healthy?

D. A scientific experiment.

2. From this text we know that ________.

A. Nicholas and James based their findings on the study of a medical research

B. Nicholas and James have been doing their research for more than twenty years

C. a person with a happy friend has more chance of feeling blue

D. a happy person is more likely to suffer from heart attack

3. The underlined word "contagious" in the third paragraph means ________.

A. contacting  

B. embarrassing

C. spreading

D. frightening

4. According to this text, which of the following four persons may have a larger effect on Mrs. Smith's

happiness?

A. Mr. Green, Smith's former classmate.

B. Mr. Thomas, Smith's colleague.

C. A friend in another city.

D. A happy single lady next door.

问答题 案例分析题

某施工单位承包一机电工程施工项目,工程内容包括工艺热力管道安装和一座钢结构框架安装。合同规定,钢材等主材由建设单位供货。施工单位安排由该单位的甲、乙两个施工队分别承担施工任务。施工中发生如下事件:

事件一:在工程中期进度质量大检查中,发现承担钢结构框架安装的乙施工队进度滞后严重,且存在材料、配件错用的情况。乙施工队作业人员回忆:乙队进场较晚,领料时领取了项目部库存所剩有的与框架钢结构施工相关的型钢和配件,发现规格型号不全,但材料库已经没有余料。材料管理员告知,材料被甲队全部领走。检查到甲队在管架预制完成后还剩余了大量材料。项目部材料供应部门将甲队剩余的余料调剂到乙队,乙队材料仍然有缺口,处于间歇停工待料状态。乙队为赶上进度,使用了部分甲队剩余的无标识配件和螺栓,导致图纸要求的合金连接螺栓多处用成普通碳钢螺栓。经查,甲、乙两队均未向项目部材料供应部门报送材料需用计划。

事件二:工艺热力管道组焊完成、水压试验前进行质量检查,发现:管道的主材(钢管)没有生产厂家的材质证明和出厂合格证,也没有进行过其他检查、检验的记录。据施工作业人员回忆:钢管由建设单位供应,工程当时由于材料供应滞后,已经影响到进度。

钢管到现场时没有出厂合格证,建设单位负责材料供应的人员表示,材料质量由建设单位

负责,先施工,合格证后补。施工单位因为是建设单位供应的材料,就没有进行其他检验,直接进行了施工,组焊完成后也无人落实合格证的事项。

工程材料进场项目部应如何管理?