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信息安全就是要防止非法攻击和病毒的传播，保障电子信息的有效性，从具体的意义上来理解，需要保证多个方面：
Ⅰ．保密性(Cont]dentiality) Ⅱ．完整性(Integrity)
Ⅲ．可控性(Availability) Ⅳ．可用性(Controtlability)
属于其需要保证方面的是（）

原型化方法是信息系统开发的有效方法之一，下述（）是实施原型化方法时必须具备的条件。
Ⅰ．需要有经验的原型化人员
Ⅱ．有快速的开发工具
Ⅲ．有原型系统的积累

战略数据规划执行过程是自顶向下规划和自底向上设计，以下（）是实现从企业模型过渡到实体分析的途径。
Ⅰ BSP研究 Ⅱ 主题数据研究
Ⅲ关键成功因素分析 Ⅳ 目标管理分析
 

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable（1） 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（2） that it must meet. The starting point is usually a set of high-level requirements from the（3）that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines （4）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 （5） 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.

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable（1） 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（2） that it must meet. The starting point is usually a set of high-level requirements from the（3）that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines （4）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 （5） 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.

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable（1） 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（2） that it must meet. The starting point is usually a set of high-level requirements from the（3）that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines （4）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 （5） 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.

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable（1） 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（2） that it must meet. The starting point is usually a set of high-level requirements from the（3）that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines （4）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 （5） 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.