在学校里,每两节课之间都规定有十分钟的课间休息时间,我们应让学生在这十分钟内得到积极的休息。为什么要有课间十分钟的休息时间呢? 五、六十个小学生挤在一个四十多平方米的教室里上课。为了防止声浪冲突,尤其是一冷二有风的冬季,一般教室都是关紧门窗上课。四十分钟的课,教室的空气已相当混浊,室温和湿度升高,空气中所含二氧化 In school, there is a ten-minute recess between every two classes, and we should allow students to take active rest during these ten minutes. Why do we have a 10-minute break between classes? Five or sixty pupils crowded into a classroom of more than 40 square meters. In order to prevent clashes, especially in a cold windy winter, the classroom are generally closed doors and windows classes. Forty minutes of class, the classroom air has been quite cloudy, room temperature and humidity, the air contains two oxidation