实验教学是以实验操作为基点，培养学生各种能力的最佳途径。因此，提高实验教学质量是化学教学的重要任务之一。但是，在实际工作中我们又深切地感到，教材中有些实验较难成功，有些实验由于设备及条件所限，需改变教材原设计。准备这样的实验，整个过程都要进行摸索。有时花 Experimental teaching is the best way to train students’ various abilities based on experimental operation. Therefore, improving the quality of experimental teaching is one of the important tasks of chemistry teaching. However, in the actual work, we deeply feel that some experiments in textbooks are more difficult to succeed. Some experiments need to change the original design of the textbooks due to limitations in equipment and conditions. To prepare for such an experiment, the whole process must be explored. Sometimes flowers