.请写出应填入下列叙述中( )内的正确答案
某一工程作业的网络图如图所示其中箭头表示作业箭头边的数字表示完成作业所需的天数箭头前后的圆圈表示事件圆圈中的数字表示事件的编号用事件编号的序列(例如)表示进行作业的路径
完成此工程的关键路径是(A)完成此工程所需的最少天数为(B)天此工程中具有最大充裕天数的事件是(C)充裕天数是(D)关键路径上的事件的充裕天数是(E)【上海大学 三 (分)】
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