上海牛津高一英语下unit4-lead-in.ppt

* Unit4 What are they? butterfly 蝴蝶 dragonfly 蜻蜓 ant 蚂蚁 bee 蜜蜂 fly 苍蝇 mosquito 蚊子 mantis螳螂 cockroach 蟑螂 scorpion蝎子 spider蜘蛛 Spiders web silk 1. Do you like spiders? Why or why not? 2. In your opinion, why are a large number of people afraid of spiders? 3. If you happen to see a spider in a corner of your room, what will you probably do? Will you scream or step it to death? 4. If you are asked to talk about spiders, what adjectives would you use to describe them? My view on spiders is that they are _______________. Unit Four Creatures Large and Small Friend or Enemy ? What do you know about spiders?（Page48) True or false? 1. All spiders are dangerous to humans. Among thousands of species of spiders in the world, few are dangerous. 2. Spiders are insects. 3. Some spiders are 25cm in size. Biggest Spider: Goliath bird-eater is as large as 30 cm in leg span. 4. Some spiders eat lizards and birds. Spiders eat insects, other spiders, and even fish. spiders insects Body parts Legs 1-4: F F T T two three eight six Spiders VS Insects eight walking legs Head and thorax (胸部) combined abdomen（腹部） Spiders VS Insects 格莱斯捕鸟蛛 Goliath bird-eater Skimming 1. What is the Friend or Enemy mentioned in the title? 2. Whose friend is it? 3. And whose enemy? A spider It’s a friend of humans. It’s an enemy of insects. Match the main ideas with the relevant paragraphs P1-5 properties uses of spider silk P6-10 uses of spiders on pest control P11-14 uses of spider poison P15-17 introduction of the topic 1. What is Betty’s response to the sight of a spider? She jumps in fright and shouts to kill it. 2. What does Winston think of spiders? He thinks that they are very useful creatures. Scanning P1-5 Introduction of the topic Different views on spiders. Uses of spiders on Pest Control seasons spiders farmers autumn