Unit2Reading2TheReturnOfTheDinosaurs.ppt

What’s the main idea of the text? * Unit 2 ReadingⅡ The Return of the Dinosaurs? dodo bird嘟嘟鸟 1755年灭绝 aurochs 原牛 1627年灭绝 great auk 大海雀 1844年灭绝 quagga 白氏斑马 1883年灭绝 霸王龙 (灭绝于6千5百万年前) 剑龙：典型的食草恐龙，全长7米，如果算上骨板的高度，身高可达3.5米。大脑只有一个核桃般大小。颈部沿着背脊直至尾巴中部，排列着两排三角形的板块，尾端有两对牛角状的尖刺，这是它的武器，到目前为止，谁也不知道这些骨板的真实用处。 原角龙：角龙类中的原始种类 雷龙 brontosaurus 无齿翼龙：翼手龙的一种。它不能长时间的振翅飞行，要借助高空气流的滑行飞越海洋。休息时，可能像蝙蝠那样用后肢倒挂在树枝上，也能收拢翅膀用四肢在地面作短距离爬行。 圆顶龙：长18米，体重18吨。以植物树叶为食。 禄丰龙：身长5米，站立时高2米多，比今天的马大不了多少。它的某些行为与今天的蜥蜴很像。 重爪龙：全长9米，高约3.6米。头部扁长，口中长满细齿，头型很像鳄鱼，前肢强壮，有三只有力的手指。特别是拇指，有一个超过30厘米长的钩爪。它喜欢吃鱼。 翼龙 pterodactyl Appreciate a short movie video from Jurassic Park Listen to the text carefully, then finish 探究二 and exercise1 on P26《状元桥》 in 5 minutes. 3分 5分 5分 7分 5分 7分 Para1 Explain the impossibility of cloning dinosaurs Para2 Conclude that it’s just a dream Para3 Introduce the topic of the passage What is the writer’s attitude towards cloning the dinosaurs? A. Supportive. B. Neutral (中立的). C. Negative (否定的). D. Subjective(主观的). Why is it either impossible or unsuitable to clone dinosaurs? (Give some reasons .) Reason 1: Reason 2: Reason 3: DNA Diversity Habitat Scientists are still experimenting with cloning mammals because they think it can make money. If we can clone any extinct animals, we should let them live in a zoo. 3. The animals that have disappeared from the earth,like dinosaurs, can never be brought back to life through cloning. True or false Why is it wrong to clone an extinct animal if it would have to live in a zoo? Because the zoo is not a to develop and increase its numbers. And the wild animals need to . suitable habitat lead a natural life Why shouldn’t you clone an extinct animal if there isn’t enough diversity in the group? Because there will not be enough genetic in the group to be ab