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SO_2是高考的重点和热点。2013年涉及SO_2的高考题和具体考点见下表。但是SO_2相关考题的答题状况仍反映出学生对此未能完全掌握。笔者根据多年教学经验发现,在掌握CO_2基础上采用存同求异的学习方法,可以帮助同学们更全面细致的掌握SO_2。一、物理性质相同:CO_2、SO_2都是无色气体,密度都比
SO_2 is the focus and hot college entrance examination. 2013 SO_2 entrance exam and specific test sites in the table below. However, the status quo of SO_2 related questions still reflects that the students are unable to fully grasp this. Based on years of teaching experience, the author found that based on the use of CO 2, different methods of learning can be used to help students master SO_2 more fully and meticulously. First, the same physical properties: CO_2, SO_2 are colorless gas, the density ratio