The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (6) 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 (7) that it must meet. The starting point is usually a set of high-level requirements from the (8) that describe the project or problem.

In either case, the requirements definition team formulates an overall concept for the system and then defines (9) 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 (10) 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.

7（）

A.criterion 

B.standard 

C.model 

D.system

查房时，医生叫患者抬起双手以观察是否有震颤，随后叫患者放下双手并询问其他的问题，然而患者继续重复刚才的动作，直至反复多次后才开始回答问题。该患者的症状可能是（）

A.违拗动作

B.强迫性动作

C.持续性动作

D.刻板动作

E.模仿动作