溶液与我们的生活息息相关．下列有关溶液的说法不正确的是（　　）

A．配置5%的医用葡萄糖溶液的一般步骤是计算，称量和溶解

B．氢氧化钠溶液能导电是因为溶液中含有较多自由移动的离子

C．硝酸钾的饱和溶液通过降温可以变成硝酸钾的不饱和溶液

D．消除路面上的积雪可以撒些盐，这样可以使雪较快地融化

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (71) 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 (72) that it must meet. The starting point is usually a set of high-level requirements from the (73) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines (74) showing how the system will be operated, publishes the system and operation concept documents, and conducts a system concept review (SCR).
Following the SCR, the team derives (75) requirements for the system from the highlevel requirements and the system operations concept. Using structured or object-oriented analysis,the team specifies the software functions and algorithms needed to satisfy each detailed requirements.

A．function

B．definition

C．specification

D．statement