幻灯、投影、电视、录像等现代化电教手段，是深受学生欢迎的一种教学形式。利用电教手段进行教学，有利于打破时间、空间和课堂条件的限制，能具体形象地再现各种事物、情景、过程；有利于突出重点，突破难点；有利于发展智力，培养能力；有利于激发学生学习的积极性和主动性 Modern audio-visual methods such as slides, projections, television, and videos are popular teaching styles. The use of audio-visual teaching methods is conducive to breaking the limitations of time, space, and classroom conditions. It can reproduce various things, scenarios, and processes in a concrete and vivid manner; it helps to highlight key points and break through difficulties; it is conducive to the development of intelligence and ability to cultivate; Student enthusiasm and initiative