题目内容：
双代号网络计划如下图所示(时间单位:天)，D工作的自由时差为(）天。
A．0
B．1
C．2
D．3
参考答案：
答案解析：
单选题：双代号网络计划如下图所示(时间单位:天)，D工作的自由时差为(）天。
- 题目分类：建设工程项目管理
- 题目类型：单选题
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A．0
B．1
C．2
D．3
A．0
B．1
C．2
D．3
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