为了解校外辅导班(小课堂)的教学环境、空气污染状况,我们对沈阳市一所重点中学的校外辅导点进行了调查。对象与方法　选择一所重点中学,随机抽取两个班并对两个班的五个校外辅导点及校内教室同时进行调查。(1)校内教室与校外辅导点房间的长与宽,计算教学面积,并按《中小学校建 In order to understand the teaching environment and air pollution situation of the extracurricular remedial classes (small classrooms), we conducted a survey on off-campus counseling centers in a key middle school in Shenyang. Subjects and Methods Select a key middle school, randomly select two classes and two classes of five off-campus counseling centers and classrooms at the same time to investigate. (1) Length and width of classrooms and off-campus counseling rooms, calculate the teaching area, according to "school building