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师:(展示课件)这是一艘现代远洋货轮,同学们知道它是用什么材料造的吗?生:钢铁。师:那古代船用什么材料制造呢?生:用木头造的。生:也有用竹子造的。生:后来就用钢铁造船了。师:这节课我们就一起来研究
Teacher: (show courseware) This is a modern ocean-going vessel, students know what material it is made of? Health: steel. Teacher: What ancient materials used in shipbuilding? Health: Made of wood. Health: also made of bamboo. Students: Later steel shipbuilding. Teacher: We will study together in this lesson