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.

17（）

A.criterion

B.standard

C.model

D.system

“资产阶级的生产关系和交换关系，资产阶级的所有制关系，这个曾经仿佛用法术创造了如此庞大的生产资料和交换手段的现代资产阶级社会，现在像一个魔法师一样不能再支配自己用法术呼唤出来的魔鬼了。”《 * * 党宣言》的这一论述主要表明（）

A.资本主义社会无法解决自身的基本矛盾

B.资产阶级在历史上的进步性和革命性

C.无产阶级进行革命的条件已经成熟

D.资产阶级已经堕落为毫无进步性的魔鬼