2009年全国甲卷21.阅读下面的材料,根据要求写一篇不少于800字的文章。英国科学家道尔顿送给妈妈一双袜子,妈妈说:“我这个年纪怎么能穿红袜子呢?”大家都说是红色而道尔顿看到的却是蓝色,他感到自己的色觉有问题。他研究了两年,1794年发表论文《视觉之异常》,将这种疾病称为色盲症,填补了医学理论上的一项空白。 2009 National A coil 21. Read the following material, according to the requirement to write an article of not less than 800 words. British scientist Dalton gave her mother a pair of socks, and her mother said: “How can I wear red socks at this age?” Everyone said it was red while Dalton saw it in blue. He felt his own color vision has a problem. He studied for two years, published in 1794, “visual anomaly,” the disease called color blindness, to fill a medical theory gap.