浙江省杭州市塘栖中学高中英语必修三：Unit3languagepoints1教学课件.pptVIP

Language points;Useful expressions:;cool down be fundamental to dissolve harmful gases and acids produce a chain reaction fill … with all sorts of the age of dinosaurs remain a mystery ;be different from all life forms give birth to in one’s turn prevent …from as a result of live on depend on;religion n. globe n. violent adj. explode v. presence n. harmful adj. exist v.;2. It exploded loudly with fire and rock, which were in time to produce the water vapour…;;4. Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later.;be harmful to 对…有害 ;6. They multiplied and filled the first oceans and seas with oxygen .;动词 ;8. in one’s turn 轮到某人，接着 in turn 轮流地，依次地 take turns to do sth. 轮流做某事 It’s one’s turn to do sth. 轮到某人做某事;9. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. ;1. This is the best way I can think of _____ into dangerous areas. A. to prevent people getting B. preventing people getting C. stopped people getting ;Useful sentences 1. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 　它将会变成什么没有人知道，直到38-45亿年前这团尘埃开始慢慢地合成一个固体的球状物。;2. The earth became so violent that it was not clear whether the shape would last or not. 地球（开始）变得激烈动荡，不知道这个固体形状是否会继续存在下去。;3. What is even more important is that as the earth cooled down, water began to appear on its surface. 更为重要的是，随着地球的冷却, 地球的表面就开始出现了水。;5. It was not immediately obvious that water was to be fundamental to the development of life.;8. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 在未来的千百万年中，生命能否在地球上延续将取决于这个问题能否得到解决。 ;Thank you.;15. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. ;; 4. Why? I have nothing to confess. ____ you want