2020届高三英语二轮复习 说明文阅读及技巧教学ppt课件.pptx

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1、说明文阅读及技巧,Reading guide for expository articles,1,Passage,Guided reading,He Jiankui,Whats behind the creation?Is this helpful?,this,Subtitles,What does the passage introduce?,Paragraph 1,What is the creation?,Topic,A Chinese scientist, He Jiankui,claimed,used CRISPR-Cas9 to edit embryos,two twin girl

2、s resulting,to try to make the babies resistant to HIV,creation,Paragraph 1,Underline key information,Type of writing,What is the purpose of the passage?,To give advice To explain an issueTo describe a phenomenonTo argue for an opinion,说明文 exposition,（2018常州期中卷：C篇64题）The main purpose of the passage

3、is to_.,A. advocate widespread road use charges in all Australian citiesB. confirm road user charging is the best way to ease congestionC. present study findings on how road use charges ease congestion,Type of writing,Understand an exposition,新课标,中心思想说明方法情感意图,What to explain,How to explain,Why to ex

4、plain,Tip1 万变不离其“中”,Focus onto grasp the main idea,first and last paragraphs,key sentences,title and subtitles,Passage outline,Part1:Part2: Whats behind the creation?Part3: Is this helpful?,What are peoples attitudes?,What is CRISPR-Cas9?,How did He make the creation?,technology,creation,attitudes,P

5、rediction,What is Julians attitude?,However, many mainstream scientists think it is too unsafe to try.,key sentences,What does the word “monstrous” mean?,A. huge B. ugly C. unnatural D. immoral,“Gene editing is experimental and capable of causing social and ethical problems.”,Part3 Attitudes,Tip2 Gu

6、ess the meaning,Complex B. Advanced C. Powerful D. Modern,taking over,字面推测 literally语境推测 context做个学霸 vocabulary,Details,Part 2 Technology,Which of the following statements is true? A. CRISPR-Cas9 was used in the first step of the creation. B. CRISPR made of a bacterial enzyme is used to edit certain

7、 genes C. CCR5 is a protein that allows HIV to enter a cell. D. The chosen sperm should be processed first to avoid HIV virus.,How to understand the terms?,Details,Understand the terms, CRISPR is a guide molecule made of RNA, which targets a specific site on the DNA double helix. CRISPR is attached

8、to Cas9, a bacterial enzyme that works as a pair of molecular scissors to cut the DNA at the exact point required.,C,M,R,H,M,9,E,C,Relation and logic, He Jiankui sought to disable a gene called CCR5 that forms a protein doorway that allows HIV, the virus that causes Aids, to enter a cell.,that,that,

9、Details,Understand “that”,that,Understand the process, He said the gene editing occurred during the following process. First, sperm was “washed” to separate it from semen, in which HIV can hide. Next, a single sperm was placed into a single egg to create an embryo. Then the gene-editing tool was add

10、ed.,Details,Landmarks (路标词),process,Which of the following statements is true? A. CRISPR-Cas9 was used in the first step of the creation. B. CRISPR made of a bacterial enzyme is used to edit certain genes C. CCR5 is a protein that allows HIV to enter a cell. D. The chosen sperm should be processed f

11、irst to avoid HIV virus.,Details,“FirstNextThen the gene-editing tool was added.”,last,Order 颠三倒四,“CRISPR is a guide molecule made of RNA”,RNA,Subject & object 张冠李戴,“a gene called CCR5 that forms a protein doorway”,gene,Concept 偷换概念,Paraphrase 换个马甲还是我！,“sperm was “washed” to separate it from semen.”

12、,Tip3,Replace with Seek to understand the relation and logic,simple letters,terms,变身ABC，理关系和逻辑,landmark words (路标词),Overview of Passage 1,What is the authors attitude?,objective,He Jiankui,Vocabulary: attitudes,positive,supportiveapprovingfavorable,negative,disapprovingdissatisfiedcriticalworriedcon

13、cerned,objective,neutralunprejudiced,one-sided,balanced,2,Passage,Independentreading,Analyze the questions,（2018江苏高考C篇）,1.The author mentions car industry at the beginning of the passage to introduce _.2.What does the author want to illustrate with the example in paragraph 2?3.What is the difficulty

14、 for those new famers?4.What should farmers do for a more sustainable and fair farm economy?,Topic,The author mentions car industry at the beginning of the passage to introduce _.A. the progress made in car industryB. a special feature of agricultureC. a trend of development in agricultureD. the imp

15、ortance of investing in car industry,Agriculture,Comparison,Tip4 举例怎么办 前后看一看,2. What does the author want to illustrate with the example in paragraph 2?,D. Small farmers may gain some advantages over big ones.,(Para.1) small farmers can get the best of the major players small famers can keep one ste

16、p ahead of the big guys(Para.2) But now they can stay in business.,Example,(Para.1) I have a front seat to the innovations among small farmers that are transforming the industry.,B. Technology is vital for agricultural development.,Small farmers are,3. What is the difficulty for those new famers?4.

17、What should farmers do for a more sustainable and fair farm economy?,C. To have farms of their own.,A. Seek support beyond NYFC.,(Para.5) we need broad support as we urge as we push for as we seek,(Para.3) makes owning ones own land unattainable for many new farmers(Para.4) Another challenge the gre

18、atest barrier to building a farm of their own,Alternatives,Key sentences,Overview of Passage 2,Part1 (1-2):Part2 (3-4):Part3 (5):,One crucial factor is secure access to land.,Another challengeis a non-existent path to citizenship.,There are solutions,Agriculture,Challenges/ Difficulties,Solutions,Sm

19、all farmers,topic,terms,attitude,Title & subtitles,1st & lastpara.s,Key sentences,Simple letters,Relation & logic,One-sided,Balanced,Highlight Reading strategies,Prediction,Example,Alternatives,Comparison,A good reader,Read widely.,Read wisely.,Homework,Review what youve learned and finish your work sheet.Summarize a guide for reading expository articles.,THANK YOU,