Each box is an activity; the number it contains is the duration of the activity in days. T
Each box is an activity; the number it contains is the duration of the activity in days. The duration of the critical path is(75)
A．16days
B．14days
C．19days
D．20days
解析：关键路径为最长时间的线路，3+6+7+1+2=19。
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