实验是传授自然知识的重要教学手段，也是自然教学的核心。村级小学由于实验设备不充足，开展小学自然实验的主要形式还是教师演示实验。通过教师的演示，使学生了解自然现象。但是，要达到理想的实验目的，使学生清楚地了解自然知识，必须努力提高实验的可见度。今就这一... Experiment is an important teaching method to impart natural knowledge, and it is also the core of natural teaching. Village primary school due to inadequate experimental equipment, the primary form of primary school to carry out the experiment or teacher demonstration experiment. Through teachers' presentations, students are taught about natural phenomena. However, in order to achieve ideal experimental purposes and enable students to clearly understand natural knowledge, efforts must be made to improve the visibility of experiments. Now this one ...