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【多选题】
在工程网络计划中，关键工作是指（ ）的工作。A.
双代号网络计划中持续时间最长
B.
单代号网络计划中与紧后工作之间时间间隔为零
C.
最迟完成时间与最早完成时间的差值最小
D.
最迟开始时间与最早开始时间的差值最小
E.
双代号时标网络计划中无波形线
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【简答题】Complete the sentences with the expressions listed below in their proper forms.( 1 空 2 分,共 30 分) specialize in be true of preside over be exposed to be stuck for have no business doing sth. see to it ...
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