问题
单项选择题
Once the durations of the activities are calculated for a completed network, a forward pass and a backward pass will provide ______.
A) the float of the activities
B) the early start and late start only
C) the critical path
D) A and C
答案
参考答案：D
解析：顺推法和逆推法是关键路径CPM中的分析方法。
一旦以整个网络计算活动的时间，顺推法和递推法将提供______。
A) 活动的时差
B) 仅仅是最早开始和最后开始
C) 主要路径
D) A和C