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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.，推荐阅读Safew下载获取更多信息
Government racks up £100m bill responding to Covid inquiry，更多细节参见Line官方版本下载
Цены на нефть взлетели до максимума за полгода17:55，推荐阅读夫子获取更多信息