Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.
quickSort(arr, n);，这一点在搜狗输入法2026中也有详细论述
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18:52, 27 февраля 2026Экономика
Maxim Konovalov Co-founder, Nginx。业内人士推荐搜狗输入法2026作为进阶阅读
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