八年级英语上:Unit7Enviroment上海课件
日期:2010-02-18 02:27
How many kinds of pollutions do you know?
Let’s see some pictures on pollution
air pollution
water pollution
acid rain
light pollution
decration pollution
Plastic pollution
Mangrove 红树林
nice viewfresh air
What shall we do facing so much pol,
查看全部