题目内容
某印刷裁纸机，只有操作工人的左右手同时按下开关A与B时（假设按下为输入1），才能进行裁纸操作，则应使用的逻辑门是（ ）。
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翻译下列句子：1、An operating system provides common services to other programs, and ensures the efficient use of hardware and software resources.2、The evolution progress of operating system includes, but not limited to, batch operating system, time-sharing systems, single-user operating system, parallel systems, distributed systems, and real-time systems.3、The basic components of the operating system are: memory manager, process manager, device manager, file manager, and user interface.4、Address space is a set of addresses that a program can use to address memory.5、Multiprogramming allows multiple programs to be performed at the same time, while monoprogramming allows only one program.6、Virtual memory means each program has its own address space, which is broken up into small units called pages.7、Partitioning means dividing the main memory into multiple partitions, usually with contiguous and variable length of address spaces.
Discuss the role of the memory manager, process manager and device manager.
Discuss the main methods used for CPU scheduling.
实施作业成本法的首要步骤是（ ）。
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