信管网章节习题

Precedence Diagramming Method(PDM) is a method used in activity sequencing.There are four types of dependencies or precedence relationships in PDM. The initiation of the successor activity depends upon the completion of the predecessor activity is called （  ）.
A．Finish-to-Start     
B．Finish-to-Finish   
C．Start-to-Start      
D．Start-to-Finish