某同学把地上的一桶纯净水扛起装到饮水机上,所做的功大约是[ ]
A.2J
B.20J
C.200J
D.2000J
答案:C
During the project, requirements change for a variety of reasons. As needs change and as work proceeds, additional requirements are derived and changes may have to be made to the existing requirements. It is essential to manage these additions and changes efficiently and effectively. To effectively analyze the impact of the changes, it is necessary that the source of each requirement is known and the rational e for any change is documented. The project manager may, however, want to track appropriate measures of requirements volatility to judge whether new or revised (75)are necessary.
A.proceedings
B.controls
C.forecasting’s
D.prelibations
行为改变的"知-信-行"模式中的知是指()
A.认知
B.知识
C.传播
D.知觉
E.感知