单项选择题

Changes often happen in ().

A.Initiating Process
B.Executing Process
C.Planning Process
D.Closing Process

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单项选择题Tool for defining activities is()

A.Dependency Determination
B.Precedence Diagramming Method
C.Rolling Wave Planning
D.Schedule Network Templates

单项选择题（） is a client server protocol for transferring files across the Internet.

A.POP3
B.IMAP
C.FTP
D.HTTP