当你想要购买自己喜欢的商品 ,却因品种真假难辨而无所适从时 ,当推销员向你天花乱坠地介绍商品质量如何如何之好 ,而你又感到疑惑 ,如入雾里云中之时 ,你可能会上当 ,也可能会忍痛割爱地放弃购物。然而 ,随着商品市场的不断发展和完善 ,一种新型的为商品质量、等级、品种等明? When you want to buy your favorite products, but because of the variety of true and false, they know what to do when the salesman introduced you to the superfluous quality of the product, and you are puzzled, as the fog in the clouds , You may be fooled, may also reluctantly give up shopping. However, with the continuous development and improvement of the commodity market, a new type of product quality, grade, variety and so on?