单项选择题
Which of the following item colorizes the paper using a two-component laser printer？（）
A.ribbon B.developer C.laser beam D.toner
多项选择题 Whichofthefollowingprintersspraysthepaper？（）
单项选择题 Whichofthefollowingshouldatechnicianusetocleantheglassonaflatbedscanner？（）
单项选择题 Whichofthefollowingprintersprintsmulti-partformsatonce？（）
