由于受应试教育思想的影响,加上现有条件的限制,特别是在使用新教材之初,教师在课堂教学中往往容易忽略实验的作用,“不得不”用“读实验、背实验、黑板(纸面)实验”的办法代替实践操作。然而,面对新教材、新实验,“黑板实验”暴露出了极大的问题,实验现象难以把握,甚至极有可能导致错误的结论。 Due to the influence of the examination-oriented education and the limitation of the existing conditions, especially when using new teaching materials, teachers tend to neglect the role of experiment in classroom teaching. “Have to read the experiment with ”, Experiment, blackboard (paper) experiment “approach instead of practice. However, in the face of new textbooks and new experiments, the ”blackboard experiment" has exposed great problems. The experimental phenomena are difficult to grasp and may even lead to erroneous conclusions.