单项选择题

To document your code can increase program (2) and make program easier to (3) .

A．reliability
B．security
C．readability
D．usability
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单项选择题
One of the basic rules of computer security is to change your ______ regularly.
A．name
B．computer
C．device
D．password
单项选择题
We can use the word processor to ______ your documents.
A．edit
B．compute
C．translate
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