有人参加励志训练，喊了很多口号，例如“我是最好的！”“我要做NO．1”……现场感觉很受鼓舞、信心爆棚。但是过不了多久，同样的口号喊起来不仅没有了振奋感，而且连自己都不相信。这是因为撑起信心的最重要的支柱是 [ ]

A．实力

B．信念　　

C．成绩

D．勇气

You are the project manager of Alpha Network Inc．Your company is doing network planning for a major bank．You are planning to digram the activity dependancies using activity list．Which of the following is true ？（）

A．PDM is also the AOA diagramming metho

B．PDM is also the AOD digramming metho

C．PDM is also AON digramming metho

D．PDM is also ADM diagramming metho