一提起糖,大家自然会联想到色泽鲜艳、香甜诱人的各种糖果.我这里说的糖,含意却很广泛,有甜的,也有不甜的.确切地说,糖是一大类化合物,叫糖类.因为它的成分是由碳、氢、氧组成的,而其中氢和氧的比例为2:1,就象水分子的比例一样,所以人们又把糖类叫做碳水化合物.糖类广泛地存在于动植物体内.它是通过绿色植物利用水和空气中的二氧化碳和阳光,进行光合 When it comes to sugar, people will naturally think of bright colors, sweet and attractive variety of candies. I am talking about sugar, meaning is very wide, sweet, but also not sweet .In fact, sugar is a large group of compounds , Because of its composition is composed of carbon, hydrogen, oxygen, of which the ratio of hydrogen and oxygen is 2: 1, as the proportion of water molecules, so people put the sugar called carbohydrates. Widely found in plants and animals, it is through the use of green plants and water in the air of carbon dioxide and sunlight, photosynthesis