老师带着一年级全体同学去消防站参观,学习救火常识。一位消防员拿着一个烟雾报警器问同学们:“你们有谁知道这个烟雾报警器是干什么用的吗?”小乔尼举起了手,消防员微笑着让他来回答。 The teacher took the first grade classmate to the fire station to visit and learn the common sense of fire fighting. A firefighter asked the classmates with a smoke alarm: “Did anyone know what the smoke alarm was for?” Johnny raised his hand and the firefighter smiled and asked him to reply.