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医药股投资，拼的是研发实力和管线厚度，而不是靠一个噱头十足的新药概念，赌一场遥不可及的未来。。关于这个话题，im钱包官方下载提供了深入分析
It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.