Unit 3 Inventors and invenPeriod Reading教材分析：本课是一篇记叙文。故事讲的是一个女孩如何通过多次尝试最后成功地把在她母亲家院子里安家的一窝蛇捉住并放归大自然的，她的捕蛇技术申请了发明专利。文章也提到了申请专利的标准。学习目标：1. 知识目标：学习本课中的重点词汇、短语和句型。2. 能力目标：培养学生快速阅读和细节分析的能力。3. 情感目标：了解科学发现与发明创造的区别以及发明产生的过程和专利认定的标准。重点难点：快速阅读能力的培养。 掌握通过文章整体，学习词汇和语法的方法。学习方法：Read the passage quickly and get the main idea. Consult the dictionary and try to remember new words.Step 1. Warming up (AB级)Discuss these questions with others in your group before reading the text.1. Do you know who is Edison?_2. Do you know how many inventions he made? Can you mention some of them?_3. Did Edison invent electricity? Can electricity be invented? Is electricity an invention or a discovery? Why?_Step 2. Fast reading (AB级)Read the passage quickly and try to answer the questions.1. What was the mother upset about?_2. Why was the writer happy to help her mother?_3. What are the three creative steps that the writer takes to catch the snakes without hurting them?_4. Why did cooling make the snakes less active?_Step 3. Careful reading (C级)1.In order to get rid of the snakes in her mothers courtyard, the writer decided to use the last approachcooling the snakes. She attempted three times. Can you describe her three attempts simply?._._._ 2. Read the passage again and try to divide the passage into three parts. After dividing the passage into three parts, try to find the main idea of each part.Part 1: Paragraph 1_Part 2: Paragraph 2_Part 3: Paragraph_Step 4.ListeningListen to the tape. While listening, pay attention to your pronunciation and intonatin. You can read quietly after it.Step 5. Long and difficult sentences (C级)1. Here was a chance for me to distinguish myself by inventing something merciful that would catch snakes but not harm them._2. The first thing I did was to see if there were any products that might help me, but there only seemed to be powers designed to kill snakes._3. Prepared with some research findings, I decided on three possible approaches: firstly, removing their habitat; secondly, attracting them into a trap using male or female perfume or food; and thirdly cooling them so that they would become sleepy and could be easily caught._4. Betreen the outside and the inside walls of the bowl there is some jelly, which freezes when cooled._5. Nor will you receive a patent untill a search has been made to find out that your product really is different from everybody elses._Step 6. Recite the sentences (C级)1. When I called up my mother in the countryside on the telephone she was very upset.2. Snakes come near the house now and then, and they seem to have made their home here, not far from the walnut tree.3. The first thing I did was to see if there were any products t