新课程标准高中英语必修四Unit 2 Working the land

　　　　　　　　　　　　　第四课时 泛读课 学案

　　Using Language

　　一．学习目标

　　1． 理解泛读课文 Chemical or organic farming ?

　　2． 掌握文中的语言知识点

　　二．知识重难点

　　1．知识重点

掌握下列单词及词组：Chemical production bacteria pest nutrition mineral discovery soil reduce root skim underline summary comment build up lead to focus on keep... free from/of

　　掌握下列句型：

　　They focus on keeping their soil rich and free of disease.

　　This also keeps the air , soil , water and crops free from chemicals.

　　三．背景知识

Organic food is one of the fastest growing areas in American agriculture. The Agriculture Department

estimates that American farmers sold 6,000 million dollars worth of organic food last year.

Organic farmers do not use chemicals to increase their crops or to control insects, weeds and disease. Many people believe eating organic food is more healthful than eating food produced with chemicals. And people are willing to pay more for organic food products.

　Currently, different private and state organizations establish organic food requirements in the United States. Each organization uses its own rules to decide which products may be called organic.

　The proposal bars the use of genetic engineering, the technology of changing the genes of living things. It bars the use of waste products to fertilize organic food. It bars irradiation treatments to kill bacteria on food products. The proposal also bars feeding antibiotic drugs to farm animals. It says farmers must feed animals only with organic food.

The Agriculture Department says the new rules will help farmers export their organic products more easily. Agriculture Secretary Dan Glickman calls the proposal the most complete and strongest organic group of rules in the world. He said Americans will know what they are buying. And, farmers will know what is expected of them.

A group representing the organic agriculture industry welcomed the proposal. The group has sought national requirements for organic food for more than ten years.

　　四．课前预习

　　 翻译下列单词,词组

1. 化学的 2.生产，制造 3. 矿物，化石

细菌 5. 焦点，集中 6.减少，减缩 7.评论