【摘要】 本文采用了三种实验设计来探讨教室空气CO2浓度对学生脑力作业能力的影响，结果表明：空气清洁时，学生进行计算，消字作业效果最好．随着空气中CO2浓度增加，作业量减少，错误率上升：至空气严重污浊时，作业效果最差．为此，教室经常进行换气是非常必要的，是保证师生健康、提高教学效果的重要措施．更多还原

【Abstract】 Three kinds of procedures were used to analyse the effect of air CO2 concentration on the mental capacityof children. The results showed that dose work (calculation and erasing) was efficient when the air in classroom was clean. The quantity of the work reduced and error rate increased with the deterioration of the quality of air. The mental capacity degraded in degree when air was seriously polluted. Thus. regular ventilation ofclassroom is of benefit to the health of students and teachers. and to raising of learning efficiency.更多还原