实体类位于系统与外界的交界处；窗体、报表等都是实体类。
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泛化关系定义为一个较普通的元素与一个较特殊的元素之间的类元关系。
A. 对
B. 错
A work package is a工作包是:
A. Deliverable at the lowest level of the WBS最低层次工作分解结构的可交付成果
B. Task with a unique identifier具有惟一标识的任务
C. Required level of reporting报告的要求水平
D. Task that can be assigned to more than one organizational unit可以被分配到一个以上组织单位的任务
Project scope management aims to ensure ().项目范围管理旨在确保()。
A. Do as much work as possible to make the project as perfect as possible做尽可能多的工作,使项目尽可能完美
B. Do and only do the work required to successfully complete the project 做而且只做为成功完成项目所需要的工作
C. Provide customers with additional product functions为客户提供额外的产品功能
D. Identify work not included in the scope of the project 确定不包括在项目范围内的工作
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