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新编实用英语综合教程1课后习题答案

新编实用英语综合教程1课后习题答案
新编实用英语综合教程1课后习题答案

高中数学必修1课后习题答案完整版

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A.椭圆形 B.矩形 C.菱形 D.三角形 【参考答案】:C 【参考解析】:在E—R图中实体集用矩形,属性用椭圆,联系用菱形。 5软件按功能可以分为应用软件、系统软件和支撑软件(或工具软件)。下面属于应用软件的是( )。 A.学生成绩管理系统 语言编译程序 操作系统 D.数据库管理系统 【参考答案】:A

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基础英语1-5单元课后习题答案

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