多项选择题
A.Pressure
B.Oil
C.Light
D.Gravity
E.Electrical Charge
单项选择题 InwhichofthefollowingsectionsofanMFPwouldatechnicianfindaXenonLamp？（）
单项选择题 Apolygonmirrorispartofwhichofthefollowingassemblies？（）
单项选择题 Acustomerhasinstalledanewcomputerontheirnetwork.Theycanprinttotheprinterbuttheoptionforduplexprintingisnotavailable.Allothercomputershavetheoption.Whichofthefollowingisthecauseoftheproblem？（）