Chinese New Year （also called the Spring Festival） is the oldest traditional festival in China， but what is the origin behi......

对食用合成色素日落黄的荧光光谱进行了研究,发现在310～400nm紫外光的激励下,日落黄溶液发出强荧光,峰值荧光强度随浓度的增加先增......