问题
单项选择题
The computer you are using is protected usually by ( ).
A．password
B．key
C．mouse
D．USB
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
The computer you are using is protected usually by ( ).
A．password
B．key
C．mouse
D．USB
参考答案：C