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系统软件（System Software）的主要功能是（）
- A、管理、监控和维护计算机软、硬件资源
- B、为用户提供友好的交互界面，支持用户运行应用软件
- C、提高计算机的使用效率
- D、以上都是
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单选题系统软件（System Software）的主要功能是（）A
管理、监控和维护计算机软、硬件资源B
为用户提供友好的交互界面，支持用户运行应用软件C
提高计算机的使用效率D
以上都是
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