【单选题】
A 1、关键路径是项目网络图中耗时最长的路径，该历时代表了完成项目的最短时间 (A critical path is one that takes the longest time in the project network diagram. The duration represents the shortest time for finishing the project.)
B 2、关键路径是项目网络图中耗时最短的路径，该历时代表了完成项目的最长时间(A critical path is one that takes the shortest time in the project network diagram. The duration represents the longest time for finishing the project.)
C 3、关键路径是项目网络图中耗时最长的路径，该历时代表了完成项目的最长时间(A critical path is one that takes the longest time in the project network diagram. The duration represents the longest time for finishing the project.)
D 4、关键路径是项目网络图中耗时最短的路径，该历时代表了完成项目的最短时间(A critical path is one that takes the shortest time in the project network diagram. The duration represents the shortest time for finishing the project.)
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