目 录 1.引言 .......................................................................................1 1.1设计目的 .................................................................................1 1.2系统概述 .................................................................................1 2.系统调查 .................................................................................4 2.1系统初步调查 ...........................................................................4 2.2需求调查 .................................................................................4 2.3 系统目标 ..............................................................................5 2.4系统可行性分析 ...............................................................