1、Unit 14 DinosaursDeaths 一. 教学内容： Unit 14 Dinosa ursDeaths 二、教学目标 知识目标：熟练掌握本单元课文中的单 词，短语和句型。 能力目标：培养学生的综合运用知识的能力。 三、教学难点： 培养学生的综合能力 四、本单元重点知识： 单词：要求大家掌握本单元单词表中的单词 （一）短语： 1. work on 从事 2. live on 以为食，继续活着 3. have a close relation 有密切关系 4. lead to 导致 5. stop sb. from doing sth. 阻止某人做某事 6. more reasonab
2、le 更合理 7. make a study of 对进行研究 8. the cause of . 的起因 9. as a result 因此 10. at the same time 同时 （二）句型： 1. This hole was believed to be caused by a large object that fell from space sixtyfiv e million years ago 人们认为这个坑是由 6500 万年前从外太空中陨落的巨大物体造成的。 2. Though it is proved that this large object had a clo
3、se relation with the death of dinosaurs and other animals, scientists have different opinions upon how the large object led to the death of the ancient animals. 尽管已证实这个巨大的物块和恐龙及其他动物的灭绝有密不可分的关系，但科学家们 对这一物体如何导致这些远古动物的灭绝仍持有不同的意见。 五、本讲重点知识讲解： Dinosaurs are extinct now. Scientists are always wondering ab
4、out the cause of their extinction. This proves to be difficult, but scientists are still working on it. It is reported that there is a huge hole in the ground in eastern Mexico. This hole was believed to be caused by a large object that fell from space sixty-five million years ago. At about the same
5、 time, dinosaurs living on the ground disappeared. Though it is proved that this large object had a close relation with the death of dinosaurs and other animals, scientists have different opinions upon how the large object led to the death of the ancient animals. 译文： 恐龙现在已经绝迹了。科学家们一直想搞清楚它们绝迹的原因。这不是一
6、件容易的事 情，但是科学家们依然在努力。 据说在墨西哥东部有个巨大的坑，人们认为这个坑是由 6500 万年前从外太空中陨落的 巨大物体造成的。在那时候，生活在陆地上的恐龙就绝迹了。因此，人们认为那个巨大的 物体可能是导致恐龙死亡的原因。尽管已证实这个巨大的物体和恐龙及其他动物的灭绝有 密不可分的关系，但科学家们对 这一物体如何导致这些远古动物的灭绝仍持有不同的意见。 Twenty years ago, scientists discovered that a large cloud of dust was created by the crash of the large object. Th
7、ey reasoned that sunlight was stopped from reaching the earth by the cloud. As a result, the weather became very cold. The cold weather and less sunshine killed many plants which were the food of dino saurs and other animals. Because of no food the animals soon died.来 译文： 20 年前，科学家们发现这个巨大的物体与地面碰撞后会产
8、生一个巨大的尘雾团，从而 阻碍了太阳光照射地面。因此，天气变得非常冷。寒冷的天气和缺少阳光使很多植物死亡， 而这些植物正是恐龙和其他生物赖以生存的食物。因为没有食物，这些动物很快就死亡了。 About ten years ago, when scientists from the United States and Mexico found that the large object caused a huge hole in Mexico, some scientists raised another theory. They said that the object was not big
9、 enough to create a deadly cloud of dust, but it hit with such great force that poisonous chemicals were released. Dinosaurs and other ancient animals were poisoned by the chemicals and then died. 译文： 大约 10 年前，美国和墨西哥的科学家们发现这个巨大的物体在墨西哥砸出的一个大坑。 一些科学家又提出了另一种理论。他们说这个物体还没有大到能够产生致命的尘雾团的地 步，但认为物体的强烈撞击致使其散发
10、出有毒的化学物质。恐龙和其他的生物就是被这些 有毒的化学物质毒死的。 Which of the two views is more reasonable, the first or the second? Maybe both. In order to test their discoveries, scientists are preparing to make a study of the rocks that remain after the large object hit. They hope that in the future we will have a better unde
11、rstanding of any chemical reactions which have influenced the environment. 译文： 这两种观点哪一种更有道理呢？是第一种还是第二种？可能两个都有道理。为了验证 他们的发现，科学家们准备研究巨石撞击地面后保留下来的岩石。他们希望未来我们能够 对损害环境的化学反应有更多的了解。 【典型例题 m 阅读与表达 阅读短文，根据其内容回答问题 Gone are the days when men and women couldnt associate (交往) with each other. When we are asked w
12、hether boys and girls can associate with each other, most of us will say, “Yes, of course. Why not?” If we want to deal with the association between boys and girls properly, here are some “dos and donts” for you to follow. Keep a normal and healthy state of mind（心态）. Our schools and classes are made
13、 up of boys and girls. It is very natural for boys and girls to contact each o ther and build up the friendship with the students of the other sex. Generally speaking, we should broaden the circle of the association. We should make as many friends as possible. We should have more friends of the othe
14、r sex instead of one or two. We should contact the students in public instead of in secret. Contact students of the other sex warmly, generously and sincerely. Dont be too nervous or too shy in contact with a person of the other sex. In that case it is very difficult for you to make a lot of friends
15、, as no one likes a person who is too shy to say a word. If you are too shy a person, you can also find a way out. First of all, you can contact the students with the same interest and hobby with you. As both of you have much in common, you may have much to talk about. If you keep doing like that, l
16、ittle by little, you will gladly find you are also as free to express yourself as others. Dont fall into the ditch（泥潭）of early love. The boys and girls at adolescence (青春期) are rich in feeling and full of imagination. They are easy to regard the friendship as a sign of love and fall in love with eac
17、h other at an early age. In my opinion, boys and girls at middle school ar e too young and too tender to shoulder the heavy duty of love. Early love is a green apple that cant be eaten. An apple wont taste sweet until it is fully ripe (成熟 ). Do keep out of early love. 1. Should boys a nd girls contact each other in public or in secret? _ 2. What does the underlined sentence in the 3rd paragraph mean? _ 3. Does the writer think the boys and girls at adolescence should have early love? _ 4. How many tips does the writer give us? _ 5. Whats the purpose of writing this passage? _
