单项选择题

A query is used to search through the database to locate a particular record or records,which conform to specified（）.

A．criteria
B．standards
C．methods
D．conditions

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单项选择题
Firewall is a （）mechanism used by organizations to protect their LANs from the Internet.

A．reliable
B．stable
C．peaceful
D．security
单项选择题
A Web（）is one of many software applications that function as the interface between a user and the Internet.

A．display
B．browser
C．window
D．view
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