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.
法国世界报周四表示，德国总理默茨此次访问杭州，绝非偶然，因为，杭州已经成为了中国数字革命的心脏城市。
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