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举一反三
【单选题】程序评价与评审技术(PERT)和关键路径法(CPM)的区别在于_____。 (140703班尚露露译)A difference between the Program Evaluation and Review Technique (PERT) and critical path method (CPM) is that:
A.
CPM 解决的是风险和持续时间的估算，而PERT则不是。CPM addresses the risk associated with duration estimates whereas PERT does not.
B.
与CPM不同的是，PERT之估算没有不确定性的风险。unlike CPM, PERT estimates only when there is no risk of uncertainty.
C.
CPM比PERT包含更多的工作，因为它需要几个持续时间的估算。CPM involves more work than PERT because it requires several duration estimates.
D.
PERT使用不同的持续时间估算，而CPM使用一个特定的持续时间估算。PERT uses different duration estimates whereas CPM uses one specific duration estimate.