A-A+ is the foundation on which applications are bu 2022-08-06 04:19:29 问答库 阅读 175 次 问题详情 is the foundation on which applications are built.A．UserB．DisplayC．PrinterD．Operation system 参考答案 正确答案：D解析：操作系统是基础，应用都是建于其上。
