高中英语 Unit 2 Working the land Working the land 课文导学案 新人教版必修4-新人教版高一必修4英语学案

Working the land Warming-up and Reading 学习目标 1. 熟记重点单词和短语，会读、拼写以及使用； 2. 理解课文，快速掌握关键信息学习重难点掌握重点句型结构并能灵活运用学法指导词不离句，句不离篇。多读多练，记忆保鲜。学习过程 生命课堂 互动探究相关材料链接Modern AgricultureFor thousands of years traditional agriculture in China did not change very much. Most farms were one-family businesses. Although China is a very big country, only 7% of the land can be used for farming. It is on this arable land that the farmers produce food for the whole population of China.It is from the early 1990s that scientists started to develop new techniques to increase agricultural production without harming the environment. Chemical fertilization, for example, helps to produce better crops, but is harmful to the environment. New techniques should increase agricultural production but also be friendly to environment. Future agriculture should depend on high technology as well as traditional methods. Not only food production is important but also taking care of the environment. The biggest problem of Chinese farmers is the shortage of arable land. Using the latest technologies, Chinese scientists grow vegetables in greenhouses. The roots of these vegetables are not planted in earth but hang in water that contains all the nutrients they need to grow. Today, many vegetables are not grown in gardens but in greenhouses. They are protected from the wind, rain and insects. The temperature is controlled with computers, or kept the same, no matter how the weather is outside.1重点句子 1. In 1974, he became the first agricultural pioneer in the world to grow rice that has a high output. 1974年，他成了世界上第一位种植高产水稻的农业先锋。 [解释] 不定式放在表示次序的...