下列关于Projected visuals、Non-projected visuals,说法错误的是( )
A.
We may use all types of non-projected visuals in testing and evaluation.
B.
Non-projected visuals can be used in many ways at all levels of instruction and in all disciplines.
C.
Projected visuals are defined here as media formats in which still images are enlarged and displayed on a screen.
D.
Projected visuals don’t require any equipment and inexpensive.