classrooms教室
classroomn.教室;课堂
classroom evaluation课堂评价
classroom efficiency课堂效率
classrooms and halls厅堂
classroom management课堂管理
classroom experiment课堂实验
classroom ethnography课堂人种志
classroom instruction课堂教学
classroom interaction课堂互动
classroom environment课堂环境
classroom and society课堂与社会