项目范围管理包括确保项目成功所需的全部工作过程，下列范围管理流程正确的是______。
①定义范围 ②核实范围 ③收集需求 ④控制范围 ⑤创建工作分解结构

A．打印服务器
B．视频会议服务器
C．办公自动化系统(OA)服务器
D．网络游戏服务器

A．The preliminary design is an internal document used only by programmers
B．The preliminary design is the result of mapping product requirements into software and hardware functions
C．The preliminary design of the product comes from the requirement specification
D．The developers produce the preliminary design by defining the software structure in enough detail to permit coding