牛奶是营养价值全面、容易消化吸收的动物性食品，它含有丰富的蛋白质和全部的必需氨基酸，含有重要的维生素和五、需的微量元素铁、钢、锌、钴、标等。对人的拉康具有重要作用。近年来，我国奶牛业及乳品工业发展很快，牛奶及乳制品越来越多地成为人们的重要管因食品。目前． Milk is a nutritious, easily digestible animal food, it is rich in protein and all essential amino acids, contains important vitamins and five, the required trace elements of iron, steel, zinc, cobalt, standard and so on. Lacan on human has an important role. In recent years, China’s dairy industry and the dairy industry have developed rapidly, and milk and dairy products have become increasingly important food for people. Currently.