Pbs Kids Curious George A Very Monkey Christmas Premiere Christms Youtube

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Pbs（ph7.4）是一种常用的缓冲液，其配方包括nacl 8g、kcl 0.2g、na2hpo4 14g、kh2po4 0.24g。这些成分按照比例混合，然后用无菌水定容至1000ml。为了确保ph.

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