单项选择题
Using the CMYK color model， the color purple is produced by combining cyan and which other color？（）
A.Green B.Magenta C.Yellow D.Black
单项选择题 Whichofthefollowingisthepurposeofatorquelimiterinaroller？（）
单项选择题 Thepolygonmirrorislocatedinwhichofthefollowingcomponents？（）
单项选择题 Acustomerisconcernedaboutexcessivemediajammingintheirdevice.WhichofthefollowingistheFIRSTthingatechnicianshouldcheck？（）
