下列关于Projected visuals、Non-projected visuals，说法错误的是（ ）

A、Wemayusealltypesofnon-projectedvisualsintestingandevaluation.
B、Non-projectedvisualscanbeusedinmanywaysatalllevelsofinstructionandinalldisciplines.
C、Projectedvisualsaredefinedhereasmediaformatsinwhichstillimagesareenlargedanddisplayedonascreen.
D、Projectedvisualsdon’trequireanyequipmentandinexpensive.