哨子,作为体育教师的第二语言,长期以来深受广大同行们的喜爱,常以能“银哨挂胸前”而成为体育教师的一大标志,一个特色。然而,你可知道,体育教师在教学中过多使用哨子会影响儿童的身心健康。因为鸣哨过多过频,易形成一种噪音。据有人测定,体育课上鸣哨时的音量可达109分贝。环境保护理论告诉我们,正常生活环 The whistle, as the second language of physical education teachers, has long been deeply loved by the majority of their peers. It is often used as a symbol and a feature of the physical education teacher. However, you may know that excessive use of whistle in physical education teachers will affect children’s physical and mental health. Because the whistle is too frequent, it is easy to form a kind of noise. It has been determined that the volume of a whistle in a physical education class can reach 109 decibels. Environmental protection theory tells us that the normal life cycle