核心产品是能够满足消费者需要的使用价值，如（   ）
the core product is to meet the needs of consumers to use value, such as (    ). A.
农产品的营养成分
the nutritional composition of agricultural products  B.
农产品的保质期
the shelf life of agricultural products C.
农产品的品质
the quality of agricultural products D.
农产品的包装
the packaging of agricultural products E.
农产品的质量标准
the quality standards of agricultural products