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化学是以实验为基础的科学,在实际教学中,有的教师因为各种原因,如器材购买困难、药品不全等,课堂演示实验都由视频替代了;有的教师因为缺乏实际操作经验,实验成功率低,演示实验也由视频替代了。在互联网时代,网上视频轻而易举地就能获取,但
Chemistry is experiment-based science. In actual teaching, some teachers have been replaced by videos due to various reasons, such as equipment purchase difficulties and incomplete drugs. Some teachers, because of a lack of practical experience, experiment The success rate is low, demo experiments are also replaced by video. In the Internet age, online video is easily accessible, however