前年10月的一天,我听了一节课,课题是《声音是怎样产生的》,至今记忆犹新。上课前,教师在讲台前放置了鼓、锣、琴、二胡等许多乐器。上课铃响后,师生开始活动。师:这节课,老师给大家带来了很多乐器,想听听这些乐器发出的声音吗?生:想。师:好,我先请一位同学上来打鼓,让我们一起来听听鼓声是怎样的。 One day in October last year, I listened to a lesson entitled “How Sound Comes” and I still remember it. Before class, the teacher placed a drum, gong, piano, erhu and many other musical instruments in front of the podium. After the bell rang, teachers and students started their activities. Teacher: This class, the teacher brought us a lot of musical instruments, would like to hear the sound of these instruments? Teacher: Well, I would like to invite a classmate up drums, let us listen to the drums is like.