某项工程由下列活动组成：
（ ） 是该工程的关键路径。
- A.ABEHJ
- B.ACDHJ
- C.ACGIJ
- D.ACFJ
正确答案及解析
正确答案
解析
本题只要会画网络图就不难。本题的解题方法可有多种：
1）单代号或双代号网络图直接找最长路径
试题（37）给出了本题的双代号网络图。
由上图可知，该工程的关键（最长）路径为ACEHJ和ACDHJ。B是正确答案。
2）网络图六标时计算法
通过计算可知总时差为0的活动为A、C、D、E、H、J，该工程的关键路径为ACEHJ和ACDHJ。B是正确答案。
3）带时标的双代号网络图法
同样可识别出，该工程的关键路径（最长）为ACEHJ和ACDHJ。同样B是正确答案。
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