题目内容
（请给出正确答案）
[主观题]
项目的进度项编码应综合考虑不同层次、不同深度和不同用途的进度计划工作项的需要，建立统一的编码
，服务于()。
A．项目管理控制
B．项目进度目标的动态控制
C．项目进度计划的编制
D．项目进度的确切实施
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A.UOPport50
B.IPprotocol51
C.TCPport51
D.TCPport50
E.IPprotocol50
F.UDPport51
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A.2700
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