13.A proprietary version of MP3, designated as , is used for iTunes music. ( )
A. MP4
B. P4M
C. PM4
D. M4P
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134,A_is used to formulate search criteria.
A. report
B. form
C. query
D. list
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120.Screen brightness can be measured as ( )
A. luminance
B. contrast ratio
C. either a.or b.
D. neither a. nor b.
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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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47.In addition to the basic typing keys, desktop and notebook computer keyboards include a( ) keypad to efficiently move the screen-based insertion point. ( )
A. locked
B. number
C. editing
D. docked
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116.The graphics card is also called a_.( )
A. video card
B. graphics board
C. either a. or b.
D. neither a.nor b.
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44.Most desktop computer keyboards also include a(n) calculator-style numeric keypad.
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127. A proprietary version of MP3,designated as ,is used for iTunes music.( )
A. MP4
B. M4P
C. PM4
D. P4M
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140. Installed on the original IBM PCs, used a command-line interface that simply displayed a "prompt” such as
A. Linux
B. DOS
C. Unix
D. HTML
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79.File shrinks the size of a file so it requires less storage space. ( )
A. compression
B. defragmenting
C. synthesizing
D. scanning
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