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根据系统的功能分析及体系设计，将系统分为基础设施层、数据管理层、用户终端层等三个体系。基础资源层是平台的基础运行环境支撑层，由代理服务器、应用服务器、数据库服务器、文件服务器组成。…

计算机基础 计算机是一种能接收和存储信息，并可以按照一定的运算规则对存储的数据进行各种计算的自动化电子设备，其由运算器、控制器、存储器、输入输出设备组成。但随着科技的发展给计算机带…

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文章目录 前言 一、开闭原则 定义 说明 理解 二、依赖倒置原则 定义 优点 理解 三、接口隔离原则 定义 四、迪米特法则 定义 优点 理解 五、里氏替换原则 定义 定义扩展 引申…