问题 单项选择题

发生水利工程质量较大、重大、特大事故时,向有关单位提出书面报告的时限为( )。

A.12小时
B.24小时
C.48小时
D.4小时

答案

参考答案:C

问答题

某汽车维修站拟开发一套小型汽车维修管理系统,对车辆的维修情况进行管理。 

1.对于新客户及车辆,汽车维修管理系统首先登记客户信息,包括:客户编号、客户名称、客户性质(个人、单位)、折扣率、联系人、联系电话等信息;还要记录客户的车辆信息,包括:车牌号、车型、颜色等信息。一个客户至少有一台车。客户及车辆信息如表2-1所示。 

2.记录维修车辆的故障信息。包括:维修类型(普通、加急)、作业分类(大、中、小修)、结算方式(自付、三包、索赔)等信息。维修厂的员工分为:维修员和业务员。车辆维修首先委托给业务员。业务员对车辆进行检查和故障分析后,与客户磋商,确定故障现象,生成维修委托书。如表2-2所示。 

3.维修车间根据维修委托书和车辆的故障现象,在已有的维修项目中选择并确定一个或多个具体维修项目,安排相关的维修工及工时,生成维修派工单。维修派工单如表2-3所示。 

4.客户车辆在车间修理完毕后,根据维修项目单价和维修派工单中的工时计算车辆此次维修的总费用,记录在委托书中。 

根据需求阶段收集的信息,设计的实体联系图(图2-1)和关系模式(不完整)如下所示。图2-1中业务员和维修工是员工的子实体。 

【概念结构设计】

 

【逻辑结构设计】 

客户((5),折扣率,联系人,联系电话) 

车辆(车牌号,客户编号,车型,颜色,车辆类别) 

委托书((6),维修类型,作业分类,结算方式,进厂时间, 

预计完工时间,登记日期,故障描述,总费用) 

维修项目(维修项目编号,维修项目,单价) 

派工单((7),工时) 

员工((8),工种,员工类型,级别)

根据问题描述,写出客户、委托书和派工单这三个关系的主键。

阅读理解

发展性试题。

请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。

注意:每空格1个单词。

     Most people feel lonely sometimes, but it usually only lasts between a few minutes and a few hours. This

kind of loneliness is not serious. In fact, it is quite normal. For some people, though, loneliness can last for

years, Now researchers say there are three different types of loneliness.

     The first kind of loneliness is temporary. This is the most common type. It usually disappears quickly and

does not require any special attention, The second kind, situation-for example, family problem, the death of a

loved one, or moving to a new place. Although this kind of loneliness can cause physical problems. such as

headaches and sleeplessness, it usually does not last for more than a year.

     The third kind of loneliness is the most severe. Unlike the second type, chronic (the opposite of

"temporary") usually lasts more than two years and has no specific cause. People who experience habitual

loneliness have problems socializing and becoming close to others. Unfortunately, many chronically lonely

people think there is little or nothing they can do to improve their condition.

      Psychologists agree that one important factor in loneliness is a person's social contacts, for example,

friends, family members. co-workers, etc. we depend on various people for different reasons; For instance, our

families give us emotional support, our parents and teachers give us guidance, and our friends share similar

interests and activities. However, psychologists have found that, though lonely people may have many social

contacts, they sometimes feel they should have more, They question their popularity.

     Psychologists are trying to find ways to help habitually lonely people for two reasons: they are unhappy and

unable to socialize and there is a connection between chronic loneliness and serious illness as heart disease,

while temporary and situational loneliness can be a sad, and sometimes dangerous condition.

      Loneliness and Disease