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1 实验用品 酒精灯、铁架台、具支试管、干燥管、玻璃管、橡皮塞、铁钉、磁铁、火柴、硫粉、铜丝、碱石灰。2 改进目的2 1 消除加热过程中产生的ＳＯ2 对环境的污染 ,防止对实验教师及学生身体的毒害。2 2 使实验过程具有可重复性 ,便于学生对实验现象的观察。3 实验
1 Experimental supplies Alcohol lamp, iron stand, test tube, drying tube, glass tube, rubber stopper, nail, magnet, match, sulfur powder, copper wire, soda lime. 2 Objectives of Improvement 2 1 To eliminate the environmental pollution caused by SO 2 generated during the heating process and to prevent the poisoning of experimental teachers and students. 2 2 Make the experiment process repeatable to facilitate students’ observation of experimental phenomena. 3 experiments