单项选择题
How many CCDs are located in a single pass duplex ADF？（）
A.One B.2 C.3 D.4
单项选择题 Whichofthefollowingutilitiescouldbeusedtodetermineasubnetmask？（）
单项选择题 WhichofthefollowingwouldbetheBESTprocessforthetechniciantofollowwhenbeginningtodiagnoseaunitatacustomerssite？（）
单项选择题 Whichofthefollowingstagesinthelaserprintprocessattractstonertothelatentimageonthephotoconductor？（）
