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1、高二选修6 Unit 4 Global warming I. Phrases1. global warming 全球气候变暖2. a supply of /supplies of 大量的3. depend on 依靠4. human activity 人类活动5. a natural phenomenon 自然现象6. be trapped in. 被困在7. a quantity of/quantities of + n. 大量的8. result in 导致.result from 原因是.9. as a result = in consequence 因此as a result of =
2、in consequence of 由于的缘故10. build up 逐渐建立11. keep on 继续12. make a difference 有影响；有关系make no difference 对没有影响；不重要13. put up with 忍受14. as/so long as 只要15. and so on 等等16. glance at 很快地看一眼.17. on the whole 大体上18. compareto./compare.with 与相比19. come about 发生(不及物)20be opposed to doing sth. 反对做某事21. heat
3、up 受热22. up to 多达; 比得上23. in the years ahead 今后几年里24. carry out 执行25. decrease by 下降了decrease (from ) to （从）下降到26. greenhouse effect 温室效应 II. Sentences (it 在强调句中的用法)强调句结构：It is (was) + 被强调成分+ that（who/whom）+句子的其他成分。1）It is human activity that has caused this global warming （正是人类的活动导致了全球变暖。）2）It is t
4、he burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.（正是越来越多化石燃料的燃烧导致了二氧化碳的增加。）3) It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere went up from 1957 to 1997.（正是一位名叫查尔斯、基林的科学家把1957年到1997年间大气层中二氧化碳的含量作了精确的统计。）4）It was Jim Brown who/whom you should ask.正是吉姆是你该问的。