案例场景观察一个小学的自然实验室,正前方是高高的,且非常大的教师讲台。两张实验桌拼成一个大的学习课桌,5个这样大的学习课桌散放在实验室讲台前方,实验室后部放着20余把椅子,供听课教师坐。每个大的学习课桌边围坐最少7人,最多8人。每张大的学习课桌上都放着一个装着许多水 Case Scene Observation of a primary school's natural laboratory, in front of a tall, very large teacher rostrum. Two experimental tables form a large study desk, five such large study desk scattered in front of the laboratory podium, the laboratory posed more than 20 chairs for teachers to sit. Each large study desk sitting around a minimum of 7 people, up to 8 people. There is a lot of water on every large study desk