18.Most database software includes tools to create all of these EXCEPT . ( )
A. electronic forms
B. insight lists
C. queries
D. reports
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78.Routers are handy for . ( )
A. exchanging data between computers on a LAN
B. connecting to the Internet
C. neither a. nor b.
D. both a. and b.
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145._is a wireless network technology that transmits data between devices using radio wave used in coffee shops, airports, and other public places.
A. Ethernet
B. Wi-Fi
C. Bluetooth
D. The Internet
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68. is usually generated at Web sites and is designed to report your online activities to marketing companies that use the information to send you advertisements. ( )
A. File Compression
B. Viruses
C. Spam
D. Spyware
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146.A_typically connects personal computers within a very limited geographical area, usually within single building.
A. BAN
B. LAN:local area network
C. WAN wide area network
D. NAN
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122. A computerdevice uses digital light
processing technology to display a computer- generated image on a large-size screen.( )
A. Video
B. Projection
C. film
D. display
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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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16.Most computers have only one location for storing data. ( )
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147.An Ethernet cable is similar to a( )_, but has a slighter larger plastic snap-in plug. A. cable television cable
B. electrical cord
C. standard telephone cable
D. headset cord
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47.The most popular pointing devices for personal computers include mice,trackballs, pointing sticks,trackpads,and joysticks.
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