【加练半小时】2017届高考英语一轮复习练习：第20练健康与医疗类（二）（含解析）_高考复习指南

　　visits the farm where the food is produced to make sure the farm

　　USDA standards.Organic meat，eggs and dairy products come from

　　that are given no antibiotics(抗生素)，must be fed organic food and have

　　to the outdoors.

　　No conclusive

　　shows that organic food is more nutritious than traditionally grown food.And the USDA—even if it proves organic food—doesn’t

　　declare that these products are safer or more nutritious.Organic foods meet the same

　　and safety standards as traditional foods.The difference

　　how the food is produced，processed and handled.Some people buy organic food for

　　reasons.Organic food is produced by

　　who emphasize the use of renewable resources.The prices between most organic food and

　　food products vary.Higher prices are due to more expensive farm

　　.A lot of work must be done every day.

　　The new USDA’s national organic programme for labeling is

　　to enabling consumers to make a(n)

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