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On some projects, especially ones of smaller scope, activity sequencing, activity resource estimating, activity duration estimating, and ( ) are so tightly linked that they are viewed as a single process that can be performed by a person over a relatively short period of time.
A.time estimating
B.cost estimating
C.project planning
D.schedule development
()是与IP协议同层的协议,可用于互联网上的路由器报告差错或提供有关意外情况的信息
A、IGMP
B、ICMP
C、RARP
D、ARP
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