文档介绍
;The user can demonstrate on a projector or computer;;;;;;;The user can demonstrate on a projector or computer, or print the presentation and make it into a film to be used in a wider field;;;;;;The user can demonstrate on a projector or computer, or print the presentation and make it into a film to be used in a wider field;;;;;;;The user can demonstrate on a projector or computer, or print the presentation and make it into a film to be used in a wider field;;;;;;;;