The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (36) of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an interative 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 (37) that it must meet. The starting point is usually a set of high level requirements from the (38) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for ’the system and then defines (39) 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 (40) 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．cotailed

B．outlined

C．total

D．complete

男，32岁，患慢粒半年，应用马利兰治疗，近半月牙龈出血明显。查：双下肢出血点，脾肋下7cm，红细胞无异常，Hb 7.0g／L，WBC 50×109／L， Plt 50×109／L，骨髓增生极度活跃，原始粒细胞占15%。该例的诊断为（）。

A．慢性粒细胞白血病

B．慢粒加速期

C．慢粒急变

D．慢粒并严重感染

E．骨髓纤维化