4In 2007, Barrangou et al. demonstrated for the first time the function of CRISPR/Cas9 as a defensive mechanism of bacteria against bacteriophage attacks by a technique called “plaquing” which builds upon the technique of “plating” bacteria on agar. Plaques of viruses on agar are areas without growth of bacteria due to viral attacks.
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历史上，在北齐奠基人高欢的带领下，他的家族和部众从敕勒川辗转回到中原腹地。湾漳壁画墓中出土了6件大型鞍马、14件小马和4件驮马，其中驮马主要作为畜力使用，小马应是未成年马驹或备用之马的体现。，推荐阅读快连下载安装获取更多信息
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