Unit 3Back to the past牛津译林版高中英语必修牛津译林版高中英语必修3返返首首页页返返首首页页返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页Because it affects water supply and agricultural productivity，human health and civil conflict.Climate change.返返首首页页Section Reading()(Welcome to the unit&Reading)新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页新新生生词词汇汇初初识识教教材材语语篇篇细细研研返返首首页页谢谢观看
