18.根据生命周期法，系统开发第一阶段的主要目的是确定系统要实现的功能，该阶段是 -湖北继续教育网网校

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[单选题]18.根据生命周期法，系统开发第一阶段的主要目的是确定系统要实现的功能，该阶段是

A系统规划阶段

B系统分析阶段

C系统设计阶段

D系统实现阶段

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