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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.
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“错误政绩观则是从个人或小团体利益出发，心浮气躁、急功近利、弄虚作假、盲目蛮干，搞‘形象工程’‘政绩工程’，留下包袱和隐患，引起人民群众强烈不满。”，详情可参考同城约会
Left to right: Ali Smeaton, Fraser Smeaton and Gregor Lawson (Co-founders).MorphCostumes。91视频对此有专业解读