（ ）is a client/server protocol for transferring files across the Internet．
A、POP3 
B、IMAP 
C、FTP 
D、HTTP 

Tool for defining activities is（ ）．
A、Dependency Determination 
B、Precedence Diagramming method 
C、Rolling Wave Planning 
D、Schedule network Templates 

Changes often happen in（ ）．
A、Initiating Process 
B、Executing Process 
C、Planning Process 
D、Closing Process