The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (16) of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each _( 17) that it must meet. The starting point is usually a set of high level requirements from the (18) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and then defines (19) showing how the system will be operated publishes the system and operations concept document and conducts a system concept review (SCR).
Following the SCR, the team derives (20) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis, the team specifies the software functions and algorithms needed to satisfy each detailed requirement.

A．rules

B．principles

C．scenarios

D．scenes

为期三天的八国集团峰会2009年7月10日在意大利奎拉闭幕。会议讨论了国际金融危机、气候变化和粮食安全等重要问题，在这些问题上，八国集团内部尚未达成一致，各方争论仍然激烈。中国的参与给这一会议注入新的活力。在对外关系中，中国始终主张坚持互利共赢，促进共同发展。实施互利共赢的开放战略，实现与各国的共同发展，既是实现我国长远发展、推动建设和谐世界的客观要求，也是中国走和平发展道路的必然选择。

结合材料请说明中国坚持这一主张的政治依据。（9分）