多项选择题
A.9 pin D-type
B.36 pin Centronics
C.25 pin Centronics
D.13 pin D-type
E.25 pin D-type
单项选择题 Aprintertakesalongtimetoprinthigh-endgraphics.WhichofthefollowingwouldbetheFIRSTactiontotake？（）
单项选择题 Atechnicianisperformingscheduledpreventivemaintenanceonalaserprinter.Whichofthefollowingshouldthetechniciancleanorreplace？（）
单项选择题 Whichofthefollowingistheprocessascannerusestoscanimagestoacomputer？（）