21世紀大學英語應用型：自主練習2（簡體書）

《21世紀大學英語（應用型自主練習）（2）/普通高等教育“十一五”國家級規劃教材》內容包括：詞匯、翻譯、閱讀理解、寫作四個方面，最後提供有練習的參考答案。以教學理論為指導，以英語語言知識與應用技能、跨文化交際和學習策略為主要內容，並集多種教學模式和教學手段為一體的教學體系。

《普通高等教育"十一五"國家級規劃教材:21世紀大學英語應用型自主練習2》目標是"培養學生的英語綜合應用能力，同時增強其自主學習的能力，提高綜合文化素養，以適應我國社會發展和國際交流的需要。

Unit 1 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 2 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 3 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 4 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 5 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 6 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 7 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Unit 8 Part One Vocabulary and Structure Part Two Translation Part Three Reading Comprehension Part Four Writing Keys

Many Americans hold a grossly distorted （受到曲解的）and exaggerated view of most of the risks surrounding food. Fergus Clydesdale, head of the department of food science and nutrition at the University of Massachusetts-Amherst,says that if the dangers from bacterially contaminated （污染的） chicken were as great as some people believe, the streets would be littered with people lying here and there.
Though the public increasingly demands no-risk food, there is no such thing. Bruce Ames, chairman of the biochemistry department at the University of California, Berkeley, points out that up to 10％ of a plant's weight is made up of natural pesticides,says he:" Since plants do not have jaws or teeth to protect themselves, they employ chemical warfare. " And many naturally produced chemicals, though occurring in tiny amounts, prove in laboratory tests to be strong carcinogens （致癌物）-a substance which can cause cancer. Mushrooms might be banned if they were judged by the same standard that applies to food additives. Declares Christina Stark, a nutritionist at Cornell University:"We've got far worse natural chemicals in the food supply than anything man-made. "
Yet the issues are not that simple. While Americans have no reason to be terrified to sit down at the dinner table, they have every reason to demand significant improvements in food and water safety.They unconsciously and unwillingly take in too much or too many dangerous chemicals. If food akeady contains natural carcinogens, it does not add dozens of new man-made ones. Though most people will withstand the small amounts of contaminants generally found in food and water, at least a few individuals will probably get cancer one day because of what they eat and drink.
To make food and water supplies even better, the Govemment needs to tighten its regulatory standards, stiffen its inspection program and strengthen its enforcement policies. The food industry should modify some long-accepted practices or turn to less hazardous alternatives. Perhaps most important, consumers will have to do a better job of learning how to handle and cook food properly.The problems that need to be tackled exist all along the food-supply chain, from fields to processing plants to kitchens.