[单选题]

中性缓冲甲醛固定液配方是

A.40%甲醛10ml,蒸馏水90ml

B.10%甲醛10ml,0.01mol/L pH7.4的PBS 90ml

C.40%甲醛10ml,0.01mol/L pH7.4的PBS 90ml

D.10%甲醛10ml,蒸馏水90ml

E.4%甲醛10ml,0.01mol/L pH7.4的PBS 90ml

参考答案与解析:

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