单项选择题

The basic concept of a data (72) is the difference between data and information.

A. warehouse
B. storage

C. base
D. service
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单项选择题
There is free firewall software available that can run on minimal hardware and provide a good level of (71) to your network.
A. protective
B. profecting
C. protection
D. profection
单项选择题
A multimedia system allows end users to share, transfer and process a variety of forms of information in a (70) manner.
A. fixed

B. fix

C. unifying
D. unified
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