2020届高三英语二轮复习-说明文阅读及技巧教学课件共30张PPT.pptx

1、Reading guide for expository articlesHe JiankuiWhats behind the creation?Is this helpful? thisSubtitles Paragraph 1What is the creation?TopicA Chinese scientist, He Jiankui of Southern University of Science and Technology, claimed in a video on Nov. 25, 2018 that he had used CRISPR-Cas9 to edit embr

2、yos for seven couples, with two twin girls resulting so far. He said his goal was to try to make the babies resistant to HIV.A Chinese scientist, He Jiankuiclaimed used CRISPR-Cas9 to edit embryos two twin girls resulting to try to make the babies resistant to HIVcreationParagraph 1What is the purpo

3、se of the passage?To give advice To explain an issueTo describe a phenomenonTo argue for an opinion（20182018常州期中卷：常州期中卷：C C篇篇6464题）题）The main purpose of the passage is to_.A. advocate widespread road use charges in all Australian citiesB. confirm road user charging is the best way to ease congestion

4、C. present study findings on how road use charges ease congestion1.中心思想中心思想2.说明方法说明方法3.情感意图情感意图What to explainHow to explainWhy to explainTip1 Focus onto grasp the main ideafirst and last paragraphskey sentencestitle and subtitles Part1:Part2: Whats behind the creation?Part3: Is this helpful? What a

5、re peoples attitudes?What is CRISPR-Cas9?How did He make the creation?technologycreationattitudesWhat is Julians attitude?However, many mainstream scientists think it is too unsafe to try. What does the word “monstrous” mean? A. huge B. ugly C. unnatural D. immoral“Gene editing is experimental and c

6、apable of causing social and ethical problems.”Tip2 Dominant languages such as English, Spanish and Chinese are increasingly taking over. (2018课标全国课标全国I, C篇篇)A. Complex B. Advanced C. Powerful D. Moderntaking over字面推测字面推测 literally语境推测语境推测 context做个学霸做个学霸 vocabularyDetailsWhich of the following stat

7、ements 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 first to avoid HIV virus.Details CRISPR is a guide molecule made

8、 of RNA, which targets a specific site on the DNA double helix. CRISPR is attached to Cas9, a bacterial enzyme that works as a pair of molecular scissors to cut the DNA at the exact point required.CMRHM9EC He Jiankui sought to disable a gene called CCR5 that forms a protein doorway that allows HIV,

9、the virus that causes Aids, to enter a cell.thatHIVDetails that 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 too

10、l was added.Details processWhich 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 first to a

11、void HIV virus.Details “FirstNextThen the gene-editing tool was added.”lastOrder 颠三倒四颠三倒四 “CRISPR is a guide molecule made of RNA”RNASubject & object 张冠李戴张冠李戴“a gene called CCR5 that forms a protein doorway”geneConcept 偷换概念偷换概念Paraphrase 换个马甲还是我！换个马甲还是我！ “sperm was “washed” to separate it from semen

12、.”Tip3Replace with Seek to understand the relation and logicsimple lettersterms landmark words (路标词路标词)What is the authors attitude?objectiveHe JiankuiVocabulary: positivesupportiveapprovingfavorablenegativedisapprovingdissatisfiedcriticalworriedconcernedobjectiveneutralunprejudicedone-sidedbalanced

13、（20182018江苏高考江苏高考C C篇）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 for those new famers?4.What should farmers do for a more sustainable and fair farm economy?Topi

14、c1. 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 importance of investing in car industryAgricultureComparisonTip4 2. What does the author want to i

15、llustrate 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 step ahead of the big guys(Para.2) But now they can stay in business.Example(Para.1) I have a front seat to the inn

16、ovations among small farmers that are transforming the industry.B. Technology is vital for agricultural development.Small farmers are3. What is the difficulty for those new famers?4. What should farmers do for a more sustainable and fair farm economy?C. To have farms of their own.A. Seek support bey

17、ond 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 greatest barrier to building a farm of their ownAlternativesPart1 (1-2):Part2 (3-4):Part3 (5):One crucial factor is secure a

18、ccess to land.Another challengeis a non-existent path to citizenship.There are solutionsAgricultureChallenges/ DifficultiesSolutionsSmall farmersattitudeTitle & subtitles1st & lastpara.sKey sentencesSimple lettersRelation & logicOne-sidedBalancedHighlight Prediction ExampleAlternativesComparison1.Review what youve learned and finish your work sheet.2.Summarize a guide for reading expository articles.THANK YOU