单项选择题
When is it advisable to dump the waste toner from a technicians service vacuum？（）
A.When it is full. B.It is not recommended. C.Before performing preventative maintenance. D.After each call.
单项选择题 HowmanyCCDsarelocatedinasinglepassduplexADF？（）
单项选择题 Whichofthefollowingutilitiescouldbeusedtodetermineasubnetmask？（）
单项选择题 WhichofthefollowingwouldbetheBESTprocessforthetechniciantofollowwhenbeginningtodiagnoseaunitatacustomerssite？（）
