在动物细胞培养过程中,下列处理不恰当的是( )
A:培养液和培养用具要进行无菌处理
B:培养基需添加动物血清、血浆等天然成分
C:提供纯氧以保证细胞的呼吸作用
D:保证提供适宜的温度和pH
阅读下列材料,回答问题。
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