单项选择题
A.Clean all fan filters； wipe down the paper path and re-adjust the corona wire.
B.Clean all pickup rollers； re-adjust the corona wire and replace the fuser assembly.
C.Clean all pickup rollers； replace the fuser assembly and clean all fan filters.
D.Clean all pickup rollers； wipe down the paper path and clean all fan filters.
单项选择题 Alaserprinterissentforrepairandtheworkorderindicatesthatthereisanimageprintingproblem.WhichofthefollowingshouldatechniciandoFIRSTtoconfirmthisproblem？（）
单项选择题 WhichofthefollowingmaycauseaprintertonotprintcorrectlyafterupdatingfromWindows98toWindowsXP？（）
单项选择题 Wheninstallinganewscanner，WindowsXPdoesnotautomaticallyrecognizethescanner.Whichofthefollowingactionsshouldbetaken？（）