单项选择题

信息系统工程项目投资控制的原则包括 (57) 。
①投资最优化原则
②全面成本控制原则
③静态控制原则
④目标管理原则
⑤责、权、利分开管理原则

A．①、②、③
B．①、②、④
C．①、②、④、⑤
D．①、②、③、④、⑤
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单项选择题
A work breakdown structure (WBS) is a tool used to define and group a project's discrete work elements in a way that helps organize and define the total work scope of the project. A WBS is most useful for ______.
A．identifying individual tasks for a project
B．scheduling the start of tasks
C．scheduling the end of tasks
D．determining potential delays
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