高一英语 Module 5 外研社【本讲教育信息】一
教学内容: Module 5二
教学目标:通过学习关于科学实验的描述,掌握实验报告的结构,明确相关的表达方式
单词liquid expand contract substance mixture oxygen electricity stage conclusion aim reaction electrical equipment react potassium sodium calcium magnesium aluminium zinc partial copper oxide rust boil ordinary steam float form dissolve balance crucible tongs flame facility lecture department astonished 重点单词expand contract mixture conclusion aim react boil ordinary form 课内词汇归纳 1
When you heat a metal,it expands
金属加热会膨胀
When you cool a metal,it contracts
金属受冷会收缩
1) expand 动词,表示“扩大,增大,扩展,使…变大”,还可表示“伸展,伸开,张开,展开”
(1) Metals expand when they are heated
金属受热会膨胀
(2) Our foreign trade has expanded greatly in recent years
我们的对外贸易近年来有了很大发展
(3) The petals of the flowers expanded in the sunshine
花瓣在阳光下张开了
2) 动词 c