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【单选题】
有关工作顺序安排的方法和成果的叙述正确的是( )。A.
位于关键线路上的工作称为关键工作，关键工作的计划进度是进度控制的重点
B.
总持续时间最长的线路称作关键线路。在网络计划中关键线路可能不止一条
C.
大多数项目管理软件都使用双代号网络技术
D.
项目网络图就是以图的形式表示工作顺序安排的基本方法
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