牛津英語高一第四單元第八課時學案和作業(yè)（學生版）

1、PAGE PAGE 4高一年級第二學期第四單元 Creatures large and small第八課時 學案 課題：Exercise Analysis 課時目標：通過使用本單元的重點詞匯，檢驗詞匯的掌握程度；通過分析典型練習，深化對本單元所學語法的理解和掌握；通過閱讀新的語篇內(nèi)容，擴充對本單元主題信息。Exercises for Unit FourI. VocabularyDirections: Put the following expressions and sentences from this unit into proper English.1. 大大小小的生物 _2. 害怕昆蟲

2、 _3. 改變我對蜘蛛的看法 _4. 為蜘蛛建庇護所 _5. 經(jīng)歷寒冬存活下來 _6. 防治害蟲的自然方法 _7. 看起來很無聊 _8. 和橡皮筋一樣有彈性 _9. 具有類似的性質(zhì) _10. 人造器官 _11. 防彈背心 _12. 治療腦部疾病 _13. 明白了你的意思 _14. 有共同之處 _15. 缺乏食物 _16. 脈搏和呼吸頻率 _17. 在池塘底部 _18. 通過皮膚呼吸 _19. 冬眠時被打擾 _20. 我昨晚看的一個電視節(jié)目改變了我對蜘蛛的看法。(view)_21. 蜘蛛熬過了寒冬出來，飽食了一頓那些攻擊農(nóng)作物的害蟲。(emerge)_22. 與蛛絲性質(zhì)相同的材料可以被用到許多領

3、域。(property)_23. 冬眠時，蝙蝠在洞穴里倒掛著，看起來好像死了。(hang)_24. 與其他冬眠的動物不同，熊冬眠時似乎在睡覺。(as if)_II. Grammar Directions: Complete the following passage by filling in each blank with the proper form of the verbs given in brackets. Many people from all over the world like to eat seafood. However, with eating seafood (1

4、)_ (become) popular, our seas are in serious trouble. The world is now eating twice as much fish as it was 30 years ago. Scientists say that if we keep (2)_ (eat) fish at this rate there may be no more fish (3)_ (leave) by the year 2048.There is so much we dont know about the sea and the creatures i

5、n it. One example (4)_ (show) how much we need to learn is the story of the orange roughy (新西蘭紅魚). (5)_ (catch) in huge numbers in the 1980s, these fish became popular all over the world. They live for a very long time and dont start breeding until they are at least 40 years old. (6)_ (breed) only e

6、very 3 to 4 years, they need a long time (7)_ (build) their population. People are now worried that the orange roughy does not have enough time to raise its numbers before (8)_ (die) out. It is now one of the most threatened fish in the ocean.Although some species are over-fished, there is a chance

7、their populations will increase again. We just need to accept that there are some species of fish we cant eat. If we stop (9)_ (eat) them, they may have a chance to survive. If we want to continue (10)_ (eat) seafood, we must respect the ocean.II. Reading comprehensionSection ADirections: Read the p

8、assage carefully and answer the following questions.Hibernation is a time when animals “sleep” through cold weather. With true hibernation, the animal can be moved around or touched without knowing it. Some animals only go into a temporary sleep time and can get up quickly like bears. We are going t

9、o use the word “sleep” sometimes, but hibernation is different from regular sleep. With normal sleep, the animal moves a little, has an active brain, and can wake up very quickly while with true hibernation, the animal appears as if dead.During the fall, hibernating animals eat more food than usual.

10、 Their bodies will live off their body fat as they “sleep” through winter. The animal will use up the body fat it stores and not lose any muscle. This causes the animal to come out of hibernation thinner but still as strong as it was in the fall. The animals get their winter nests and dens ready. Di

11、fferent kinds of animals hibernate in different kinds of safe spots. When they go into hibernation and their bodies slow down, enemies can get them more easily. They try to pick the safest place to spend the winter away from these enemies.Hibernation is the way that animals adapt to the climate and

12、land around them. Animals must be able to live through extreme cold or die. Animals hibernate or go into a deep sleep to escape that cold. They also do this because it is really hard to find food during the winter.When an animal begins to hibernate, its body temperature drops to a very low degree so

13、 that it almost matches the temperature outside. The animals heartbeat and breathing rate slow down, too. This is when that stored fat that the animal packed on in the fall comes in handy. This stored fat lasts long because their bodies are slowed down so much that they dont need much energy.1. In w

14、hich way is hibernation different from regular sleep?2. Why do animals store body fat in the fall?3. What changes happen to the body when an animal is hibernating? Section BDirections: Read the following passage. Fill in each blank with a proper sentence given below. Each sentence can be used only o

15、nce. Note that there are two more sentences than you need.A. They have discovered that a gene called Sir 2 is responsible for the health benefits of calorie restriction, perhaps by repairing our DNA.B. The gene is present in all animals, including humans.C. They become resistant to most age-related

16、diseasescancer, heart disease, diabetes (糖尿病)and live 30 to 50 percent longer.D. Recent research has shown that aging is due to biochemical and genetic changes. E. We already know that some animals do not seem to age.F. But some recent research suggests that aging may not be inevitable.Nothing seems

17、 more inevitable (不可避免的) than aging and deathnot even taxes. Every plant, animal and person you have ever seen will eventually die. (1)_Indeed, as our understanding of it grows, aging can be seen not as an unchangeable reality from which there is no escape, but as the product of biological processes

18、 that we may be able to control someday.(2)_. Many cold-water ocean fish and some amphibians never reach a fixed size; they continue to grow bigger, to be able to reproduce and to live until something kills them. What these creatures seem to be telling us is that something in their genesand possibly

19、 in ourscontrols the pace of aging, and that aging is not the fate of every living thing.Throughout the history of life on earth one of the most common difficulties that animals (and their cells) have faced has been a lack of food. About 70 years ago, scientists discovered that when animals are forced to live on 30 to 40