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初三物理第六章“热机和环境保护”一节中介绍了“热机的广泛应用,促进了社会发展和人们生活水平的提高。但是,任何事物都有两面性,热机的大量应用,也会污染环境,给人类带来危害。”众所周知,热机工作时会产生很大的噪声,噪声过大会严重干扰人们的工作和学习,影响人们的身体健康,令人感到厌烦,殊不知,噪声也有其有利的一面,能够被人类所利用,随着现代科学技术的发展,人类对噪声的利用也会越来越广泛,为了提高学生的学习兴趣,扩展学生的视野,在本节教学中适当补充了下列内容,经过两年的实践,效果较
The physics of the third chapter of the physics chapter “Thermal Machine and Environmental Protection” described in the section “The widespread application of heat engines has promoted social development and improvement of people’s living standards. However, everything has a two-sided nature, and many applications of heat engines also contaminate it. The environment is harmful to humans.” As we all know, when the heat engine is working, it will generate a lot of noise. Noise is too large to interfere with people’s work and study seriously, it affects people’s health, and it’s boring. Everyone knows that noise is also beneficial. On the one hand, it can be used by humans. With the development of modern science and technology, the use of noise by humans will become more and more extensive. In order to improve students’ interest in learning and expand their horizons, the following content is appropriately supplemented in this section of teaching. After two years of practice, the effect is relatively