单项选择题
A.apply
B.cleanup
C.commit
D.reject
单项选择题 SeveralpeopleinanInformationTechnology（IT）departmentareaskingforfilesetupdatesthatthesystemadministratorreceivedearlierthatdayonCD-ROM.Thesystemadministratorcreatedaninstalldirectoryontheirmachineandmadeitavailabletoeveryone.WhichofthefollowingcommandswillallowthesystemadministratortocopytheimagesfromtheCD-ROMtotheinstalldirectory？（）
单项选择题 Asystemadministratorhasjustinstalledanewmaintenancelevel，but"oslevel-r"doesnotshowthecorrectmaintenancelevel.Whatcommandcanbeusedtodeterminewhichfilesetsaredownlevel？（）
单项选择题 AcustomerhasapSeriesthatneedstobeupgradedfromAIXVersion5.1toAIXVersion5.2.Thecustomerwantstoretain/etc/passwd.Whichofthefollowinginstallationtypesshouldbeused？（）