Topic 2 A ll these problems are very serious.
Section C
一、学习目标
1、Teaching and learning aims and demands.
①New words and phrases.
take away __________ oxygen/ /__________, _______
hole/ /__________, __________
ozone layer/ /__________
radiation/ /__________, __________
directly/ /__________, __________
carbon dioxide/ /__________, __________
form/ /__________, __________
blanket/ /__________, __________
escape/ /__________, __________