from one phase are usually reviewed for completeness and accuracy and approved b
from one phase are usually reviewed for completeness and accuracy and approved before work starts on the next phase.
A．Process
B．Milestone
C．Work
D．Deliverables
正确答案：D解析：一个阶段所产生的可交付物通常要在开始下一阶段的工作之前对其完备性和正确性进行评审并获得批准。
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