多媒体提供的图像清晰、直观、生动,能使学生简便、快捷地直观现象,感到真切、自然,甚至可以身临其境,进入由形象、色彩、声音等混合构成的氛围,使教学过程情境化、趣味化、形象化,诱发了学生的情感体验,加大了有效信息的接受量,开辟了多向立体的思维通道,促进学生观察力的形成、想象力的增强、审美能力的提高。一、有利于激发学生的学习兴趣 The images provided by the multimedia are clear, intuitive and vivid. Students can learn the visual phenomenon easily and quickly, feel real, natural and even immersive, and enter into the atmosphere composed of the mixture of image, color and sound to make the teaching process contextualized , Which is interesting and vivid. It induces students ’emotional experience, increases the amount of effective information received, opens up a multi-dimensional thinking channel, promotes the formation of students’ observational power, enhances imagination, and improves aesthetic ability. First, help to stimulate students’ interest in learning