An operating system is (74) .(74)
2024-09-08 130次 软考初级 反馈错误 加入收藏 正确率 : 100%
题目内容：
[单选题]An operating system is (74) .(74)
A． the highest layer of software
B． the lowest layer of software
C． the highest layer of hardware
D． the lowest layer of hardware
本题链接：
