洋的边缘部分称为_____，沟通两个海域之间的狭窄水道叫做_______。
海（边缘海）；海峡
给我们介绍一下你自己。
1. What's your name?
_________________________________
2. What's your favourite food?
3. What colour are your eyes?
4. What do you do with your ears?
5. How many ears do you have?
空调机组中通风机有什么作用？
