Unit 1 Ag ricultu re农业 Lead—in Text A Industry Must Help to Fill the World S Rice Bowl Text B Advice on Ag—Tourism 0 Text C Brief History of Agriculture 5 Uflit 2 AnimaI Science动物科学 Lead—in Text A Woman Who Lost Leg Finds Inspiration from Disabled Dolphin Text B 10 Ways to Plan for Air Travel with Your Dog Text C Rescue DogUnit 3 Food食品 Lead-in Text A Celery Is an Ancient Healing Food Text B Avoid High Fructose Corn Syrup in Beverages and Processed Foods Text C 15 Fat—Burning FoodsUnit 4 Genetically Modified Technology转基因技术 Lead-in Text A Bt.Corn:What It Is and HOW It Works? Text B Breakthrough:Food For the 21 st Century I Text C Eggplant Getting More ValueUnit 5 Environmental Protection环境保护 Lead-in Text A Meat—eaters Soak Up the World’S Water Text B What Is the Greenhouse Effect? TextC NaturalGasUnit 6 Water Conservation水资源利用 Lead-in Text A Seawater Toilets Help Flush away Water Shortages Text B University's Laser Experiment May RevolutionizeIrrigation,Save Water TextC 11 WaystoConserveWaterintheHomeUnit 7 Fishing渔业Unit 8 Horticulture园艺Unit 9 Forestry林学Unit 10 Agricultural Mechanization农业机械化Unit 11 Insects昆虫Unit 12 Agricultural Economy农业经济Tapescript课文参考译文练习答案