单项选择题
A.98
B.127
C.254
D.120
单项选择题 WhichofthefollowingdesktophardwareshouldatechnicianbeMOSTconcernedwithdisposingofcorrectly？（）
单项选择题 Duringbootup，alaptopscreendisplaysverticalcoloredlinesandthentheLCDscreengoesblank.Therearenodisplayproblemswhenconnectedtoanexternalmonitor.Whichofthefollowingactionsshouldbetakentoresolvetheproblem？（）
单项选择题 Whenconnectingalaserprintertoanetworkforthefirsttime，atechnicianshouldFIRST：（）