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一、改善营养的好处据专家研究所得结果。不适当的饮食可严重影响儿童的学习能力和行为。美国加洲圣地亚哥一家营养学院最近通过实验,发现不少儿童依照营养食谱进食,知力可以提高。二、比铁还硬的塑料一种以丁二炔为原料制成的塑料。重量仅是铁的七分之一,硬度大大超过铁。将被用于航天航空领域和精密制造领域。三、水稻直播法用一种由过氧化钙、
First, the benefits of improving nutrition According to the results of expert research. Improper diet can seriously affect children’s learning ability and behavior. A recent study by a nutrition institute in San Diego, California, USA, found that many children can eat their diet in accordance with nutrition recipes and their knowledge can be improved. Second, the hard plastic than iron A kind of diacetylene as raw material made of plastic. The weight is only one-seventh of the iron, the hardness is much higher than the iron. Will be used in the field of aerospace and precision manufacturing. Third, direct-seeded rice with a calcium peroxide,