以下关于层次化网络设计原则的叙述中，错误的是（13）。

75.(  )

74.(  )

73.(  )

72.( )

Asystem's architecture is a representation of a system in which there is amapping of（71）onto hardware and softwarecomponents, a mapping of the（72）onto thehardware architecture. and a concern for the human interaction with thesecomponents. That is, system architecture is concerned with a total system, includinghardware. software, and humans.

Softwarearchitectural structures can be divided into three major categories, dependingon the broad nature of the elements they show.1）（73）embodydecisions as a set of code or data units that have to be constructed orprocured.2）（74）embody decisions as to how the systemis to be structured as set of elements that have runtime behavior. andinteractions.3）（75）embody decisions as to how thesystem will relate to nonsoftware structures in its

environment(suchas CPUs, file systems, networks, development teams, etc.).

71.( )

1路和2路公交车都将在10分钟内均匀随机地到达同一车站，则它们相隔4分钟内到达该站的概率为（）。

以下著作权权利中，（68）的保护期受时间限制。

某企业拟生产甲、乙、丙、丁四个产品。每个产品必须依次由设计部门、制造部门和检验部门进行设计、制造和检验，每个部门生产产品的顺序是相同的。各产品各工序所需的时间如下表所示：

只要适当安排好项目实施顺序，企业最快可以在（69）天全部完成这四个项目。

以下作品中，不适用或不受著作权法保护的作品是（67）。

以下关于为撰写学术论文引用他人资料的叙述中，错误的是（66）。