浙江省草塔中学：Unit2Workingtheland（Usinglanguage）课件（人教版必修四）.ppt

人教课标 高一 必修 4 Unit 2;Using Language Chemical or Organic Farming; What is the substance we put on the soil which makes crops grow? It is fertilizer. ;How many kinds of fertilizers do farmers use? There are two kinds. They are chemical fertilizers and natural ones. zxxk ; Which kind do farmers use when they are doing organic farming? Do you know about organic farming? ; ORGANIC FARMING Organic farming is simply farming without using any chemicals.;;1. Why are chemical fertilizers so popular in farming today?;2. What problems can be caused by using chemical fertilizers?;3. What is organic farming? ;4. What is the main reason for using organic farming methods? ;II. Read the text again and fill in the blanks.;Chemical Farming;Organic farming;Organic farming;In what condition do you think green food grow?;Main idea of the passage;ORGANIC FARMING;1. Damage the land by killing the helpful bacteria and pests as well as the harmful ones;Ⅲ Organic farming is becoming more popular with some farmers and many customers after these discoveries came out. IV Other methods to keep the soil fertile.;Project;Language points;[联想] result in引起(某种结果)、使获得(某种成果)、结果……。如： The accident resulted in two deaths. result from由……造成、因……而产生。如： Sickness sometimes results from eating too much. [即学即练] 用lead to的适当形式完成句子。 1. Students should always remember that hard work is the main way which ______ success. 2. The bad weather _____ a terrible accident a few days ago.;2. focus用法 根据语境推断focus在下列句子中的含义, 并从a-d中找出与每句话中的focus相符合的英文释义。;1. The focus of the meeting changed from population growth to the education of women. 2. Bring the object into focus if you want a clear photograph. 3. She tried to focus her mind on her work. 4. She turned the camera and focused on Martin’s face. a. the thing, person, situation, etc. that people pay special attention to b. a point or distance at which the outline of an object is clearly seen by the eye or through a le