题目内容

某生产设备上有水压信号A与重量信号B，只有当两信号同时为低电平时，检测电路输出高电平信号报警（其他情况均不报警），则应该使用的逻辑门是（）。

A. 与门
B. 或门
C. 与非门
D. 或非门

查看答案

搜索结果不匹配？点我反馈

更多问题

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（）。

A. 与门
B. 或门
C. 与非
D. 非门

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.