单项选择题

Most______measures involve data encryption and password.

A．security
B．hardware
C．display
D．program
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单项选择题
The term“______”program”means a program written in high-level language.
A．compiler
B．executable
C．source
D．object
单项选择题
A．______infected computer may lose its data.A．fileB．data baseC．virusD．program
A．______infected computer may lose its data.A．file
B．data base
C．virus
D．program
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