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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
There are few things sadder than the end of a close friendship. Whether it happens in a sudden moment of betrayal or after years of gradual separation, the feelings of loss can stay with you for a lifetime.。业内人士推荐搜狗输入法下载作为进阶阅读