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【简答题】
VRBA(结晶紫中性红胆盐琼脂)中能够抑制革兰氏阳性菌生长的成分为 。
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【单选题】将一透明容器抽成真空,放入固体碘,当温度为50°C时,可见到明显的碘升华现象,有紫色气体出现。若温度维持不变,向容器中充入氧气使之压力达到100kPa时,将看到容器中
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