单项选择题
A.RAID 1
B.RAID 5
C.RAID 0
D.RAID 2
多项选择题 Whichofthefollowingshouldbeconsideredwhenupgradingmemory？（）
单项选择题 Auserreportsthatwhentryingtoprintadocumentnothingcomesoutoftheprinterandstatesthattheonlyprinterintheprinterdialogboxis’MicrosoftOfficeDocumentImageWriter.’Thetechnicianshouldunderstandthattheproblemisthattheprinter：（）
单项选择题 Auserreportsthatthedisplayonthelaptopappearsblurred.WhichofthefollowingisMOSTlikelythecause？（）