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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.
。雷电模拟器官方版本下载对此有专业解读
什么是正确政绩观？什么是错误政绩观？
（作者为中国社会科学院学部委员、台湾史研究中心主任）