33.The most popular pointing devices for personal computers include mice,trackballs,pointing sticks,trackpads,and joysticks.
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22.Input can be supplied by a person, by the environment, or by another computer. ( )
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30.In the context of computing, software refers to symbols that represent facts, objects, and ideas. ( )
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144._gather,format,and present information in the database, and can typically be printed, published on the
Web,or e-mailed to other people.
A. Forms
B. Links
C. Reports
D. Queries
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46.High-speed printers,optical character readers,computer-controlled robots, package scanners, and UPC scanners can all be consider.
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98.Wireless signals can be disrupted by . ( )
A. interference from electrical appliances
B. hills, valleys, trees
C. brick walls and concrete floors
D. all of the above
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95.Digital audio is music, speech, and other sounds represented in format for use in digital devices. ( )
A. neither a. nor b.
B. analog
C. binary
D. both a. and b.
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88.A typically connects personal computers within a very limited geographical area, usually within a single building. ( )
A. BAN
B. WAN
C. NAN
D. LAN
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150.Within a( )_network, network data can travel directly from one device to another.
A. adhoc(临时的)
B. loose
C. random
D. rouuted
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35.Examples of input that a computer can accept include . ( )
A. all of the above
B. instructions from a computer program
C. audio signals from a microphone
D. temperatures from a thermostat
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