问题
单项选择题
(73) are essential for the protection of data.
A．Memory
B．Backups
C．Files
D．Blocks
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
(73) are essential for the protection of data.
A．Memory
B．Backups
C．Files
D．Blocks
参考答案：C
