资源数据表描述的是()。

统计抽样法可以确定项目的某个元素和产品是否符合要求。其最大优势在于：（）

请考虑下表中的数据假设项目只包括这三个活动项目的完工估算是$这说明计算完工估算时采用的是以下哪个公式？

The sponsor and other in your organization are repeatedly requesting changes . When you try to implement some of the changes, you discover the current contract does not include a budget for evaluating changes . What should you do？

Which item is not a basic element of a contract？