社会交换论特别强调()原则。
参考答案:合理性
( )对进度问题进行分析,提出几个可能的方案,并对其进行比较。
A.进度控制部门
B.施工协调部门
C.项目经理
D.项目经理助理
You should have told me there was no meeting today, I _____ have run all the way here through the heavy rain. [ ]
A. can't
B. mustn't
C. shouldn't
D. needn't