Unit 3 period 9 学案-(2019)新外研版高中英语必修第三册.docx
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1、Book 3 Unit 3- Period 9 (Mar. 2020) By: Liang Proofreader: people oriented Create and develop Liaozhong No.1Senior High School 高一英语第一学期第25个学案Teaching & Study plan-Book3 Unit 3 The world of science Period 9ClassNameGroupEvaluationThree-dimensional objectivesKnowledge and abilities:To grasp words and
2、phrasesProcess and methods:By taking notes and practisingAttitude and values:To develop the sense of responsibilityImportant pointsMemorizing the key pointsDifficult pointsApplication Learning methodsStudent-centred (self study,cooperation and exploration)Teaching ContentsStep 1 Lead in Have a revis
3、ion on this unit.Step 2 Study (Thinking ; Presentation and Discussion)D The bristlecone pine is the longest-living thing on the earth. These trees, with their strangely-shaped, wind-beaten limbs(枝 干), can live up to 5,000 years. But experts worry that a warming climate in some areas may threaten its
4、 future. Researchers say warmer weather is permitting a similar kind of tree, the limber pine, to take over good growing places from the ancient bristlecone. They say the tree is being crowded out of mountainous areas where it grows. “The bristlecone pine is the oldest individually growing organism,
5、” researchers say. They grow in high mountain forests in eastern California, Nevada and Utah. In those mountains, the trees face high winds and extreme temperatures, which leave them with twisted limbs and shapes. “Even in such tough conditions,” Brian Smithers, a researcher at the University of Cal
6、ifornia, said, “the limber pine is taking all the good spots.” The limber pine is the bristlecones distant relative and competitor. It can also live a long timeup to 2, 000 years. And it is usually found at lower altitudes, where temperatures are warmer. However, according to a three-year study whic
7、h centered on trees that have started growing in the last 50 years in Californias White Mountains, most of the trees growing at higher altitudes were limber pines. Scientists compared the competing species to two old men in a very slow race up a mountainside. This race between such slow- growing tre
8、es takes thousands of years. They say climate change is causing the competition. Smithers said the bristlecone pines are not in danger of disappearing. But he assumes they could be crowded out of some places where they have grown for thousands of years. The researchers say the findings show how clim
9、ate change can affect the two kinds of trees. The information, they say, can help scientists understand more complex forests. 12. Whats the function of Paragraph l? A. To introduce a topic. B. To summarize the whole passage. C. To describe the appearance of a tree. D. To praise the hard work of the
10、experts.13. What does the underlined sentence in Paragraph 2 mean? A. There will be older trees sent out of those mountains. B. There will be more places covered with bristlecone pines. C. There will be better limber pines replacing the ancient ones. D. There will be fewer bristlecone pines growing
11、in those areas. 14. According to the passage, the reason why limber pines can grow at higher altitudes is _. A. the high winds B. the difficult conditions B. the changing climate D. the extreme temperatures 15. What is the researchers attitude towards the future of the bristlecone pine? A. Positive.
12、 B. Concerned. C. Enthusiastic. D. Indifferent. 第2节 (共 5 小题;每小题 2. 5 分,满分 12. 5 分) 根据短文内容,从短文后的选项中选出可以填入空白处的最佳选项。 选项中有两项为多余选项。 Making a budget can be quite a satisfying process. After drawing one up, youll probably feel proud that youve controlled your finances. However, drawing up your budget isnt
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