中师化学竞赛是为了配合《园丁科技教育行动》的实施，激发学生学习的兴趣，引导学生联系实际学习化学，提高科学素质，以适应培养跨世纪人才的需要。竞赛的很多试题都是日常生活中的常见现象，但能了解其中科学原理的学生并不多。现从试卷中选一些试题进行分析讨论。试题... The division chemistry competition aims to accompany the implementation of the “Gardening Science and Technology Education Initiative” to stimulate students’ interest in learning, guide students to contact the actual study of chemistry, and improve the scientific quality to meet the needs of training cross-century talents. Many questions in the contest are common in everyday life, but not many students understand the principles of science. Now select some questions from the test paper for analysis and discussion. Questions...