以电视为主体的传播艺术，其主要的传达方式是视觉，因而有人称我们这个时代为视觉时代。它和口语时代的直接的视听方式不一样，必须以媒介为中介，因此，传播艺术的制作者们，想方设法要让人们看见。德吕克说道，电影的本质是“上镜头性”（电影导演在挑选演员的时候首先要考 The main communication method of the art of communication based on television is vision, so some people call us this era as the visual era. It is not the same as the direct audiovisual approach in the spoken language. It must be mediated by the media. Therefore, the producers who spread the art find ways to make people see it. Derrick said the essence of the film is “on the lens” (the film director in the selection of actors when the first test