以下软件中，属于系统软件的是（ ）。
- A.图书管理系统
- B.杀毒软件
- C.数据库管理系统
- D.即时通讯软件
正确答案及解析
正确答案
解析
应用软件是指用户利用计算机的软硬件资源为某一专门的应用目的而开发的软件，通常通过程序设计语言来开发。通过程序设计语言编制程序后，由计算机运行该程序，按设计者的意图对数据进行处理。操作系统是计算机系统中的核心系统软件，负责管理和监控系统中的所有硬件和软件资源，其他系统软件主要是一些编译程序和数据库管理系统等。应用软件包含常见的办公软件、管理软件和某些行业应用的软件等。
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