下列组织工具中,能够反映项目所有工作任务的是() A.组织结构图 B.工作流程图 C

题型:单项选择题

问题:

下列组织工具中,能够反映项目所有工作任务的是()

A.组织结构图

B.工作流程图

C.工作任务分工表

D.项目结构图

考点:建设工程施工管理(二建)施工管理综合练习施工管理综合练习题库
题型:单项选择题

Young drivers are over-represented in alcohol--related driving accidents. In recent years, people aged 16 to 24 were involved in 28 percent of all alcohol--related driving accidents, although they make up only 14% of the U. S. population. Young people are also over--represented in drinking driver injuries and deaths. Even when their blood alcohol contents (BACs) are not high, young drinkers are involved in driving accidents at higher rates than older drivers with similar BACs.

Fortunately, driving accidents have been declining among young people, just as they have among the general population. And deaths associated with young drinking drivers (those 16 to 24 years of age) are down, having dropped 47% in a recent 15--year period.

In contrast to popular belief, drinking among young people is dropping and has been doing so for many years. For example, statistics demonstrate that within a period of about 20 years, the proportion of American high school seniors who have ever consumed alcohol is down 13%;the proportion of those who have consumed alcohol within the previous year is down 15%.

Exaggerating the degree of drinking problems of young people may create an unexpected problem. When young people go to college falsely believing that most others are drinking heavily, then they may try to follow suit. Thus, those who exaggerate the problem of alcohol abuse actually contribute to the problem and make it worse. However, when students find out that most others don’t drink as much as they incorrectly believed, they are very likely to drink less and even give up. So, honest accuracy rather than dishonest exaggeration is the most effective way to reduce alcohol abuse and the problems it causes.

60. We can learn from the first paragraph that ____.

A. in the U. S. people aged 16 to 24 caused half of the alcohol--related driving accidents

B. young drinkers are more likely to cause accidents than adult drinkers

C. young drinkers are able to keep calm when their BACs are not high

D. people aged 16 to 24 make up a quarter of the U. S. population

61. It can be inferred from Para. 3 that ____.

A. high school seniors turn to alcohol to get rid of their pressure

B. it’s a fact that young people are drinking more nowadays

C. the number of high school students in the U. S is dropping

D. most people believe more and more young people are becoming addicted to drinking

62. The underlined phrase “follow suit” in the last paragraph means ____.

A. stop drinking

B. wear the same suit as others do

C. start drinking

D. hate what others do

63. Which of the following statements does the author agree to?

A. Driving should be forbidden among people aged 16 to 24.

B. Many young people in the U. S. are acting totally irresponsibly.

C. The drinking problems of young people are turning for the better.

D. Students will stop drinking if they believe most others are drinking heavily.

题型:单项选择题

对水航速是船舶在()情况下的对水航速。

Ⅰ.无风流;Ⅱ.有风无流;Ⅲ.有流无风;Ⅳ.有风流。

A.Ⅰ

B.Ⅰ~Ⅳ

C.Ⅰ,Ⅱ,Ⅳ

D.Ⅰ,Ⅱ

题型:单项选择题

用比色法测定硅酸根时,加3ml正丁醇的目的是().

A、萃取硅钼蓝便于比色

B、起还原作用

C、起氧化作用

D、络合作用

题型:单项选择题


阅读以下某门禁控制系统的技术说明,根据要求回答问题1~问题3。
[说明]
门禁系统是楼宇安防系统的重要组成部分,也是大厦智能化管理的体现。其工作过程是,如果在入口处的读卡器上刷卡,锁控器(LockController)接收读卡器(FingerReader)的读卡信息并进一步识别,如果为有效卡,则触发控制电控锁(Lock)的继电器,让持卡人通过。锁控器还会将这些读卡及进出事件存储起来,并将相关事件记录传送给上位机。每个锁控器管理1~4个门,每5~8个锁控器接入1条RS-485总线,并转换成RS-232方式与管理主机的串行口。对锁控器进行相关设置后,允许它脱机独立对门禁点进行控制,管理主机或通信线路故障都不会影响它的正常运行。在普通场合通常会设置1个出门按钮,允许已进入的人员按动此按钮以打开电控锁;而对于一些重要场合通常会在门的内外安装两个读卡器,进出门时都需按预设方式进行刷卡。
门禁系统中的每个电控锁都有一个唯一的编号。锁的状态有两种:“已锁住”和“未锁住”。在管理主机上可以设置每把锁的安全级别及用户的开锁权限。只有当用户的开锁权限大于或等于锁的安全级别并且锁处于“已锁住”状态时,才能将锁打开。用户的感应卡信息、开锁权限及锁的安全级别都保存在管理主机的数据库中。表2-19给出了门禁系统主要组成部件的作用。

表2-19 感应门禁系统主要组成部件及其作用表

部件名称主要作用(功能)
读卡感应器(FingerReader)通过射频感应原理,识别感应卡内置加密卡号
锁控器(LockController)存储感应卡权限和刷卡记录,向管理软件上传读卡器送来的信号,并负责和上位机通讯和其他数据存储器协调
电控锁(Lock)电动执行机构
主机管理软件(Win-Pak Software)通过计算机对所有单元进行中央管理和监控,进行相应的时钟、授权、统计管理工作
RS-485/232信号转换器对所有数据存储器进行联网和远距离通信
门禁电源提供系统工作时所需的电源能量
感应卡存储用户的不可复制和解密的ID号
开门按钮出门时可以设置为按此按钮出门(可选部件)

软件开发公司A承担了该门禁控制系统的开发任务,其开发小组采用根据问题领域的模型建立系统结构的面向对象方法完成该系统的设计,系统中的类及类之间的关系用UML类图表示。

[问题3]
在系统的需求分析阶段,可以使用用例对系统需求建模。用例可以使用UML的用例图来表示。请分别用100字以内的文字解释UML用例图中扩展用例和抽象用例的内涵。

题型:单项选择题

工伤职工治疗非工伤引发的疾病时,可以适当享受工伤医疗待遇。

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