题目:
制作果醋时,要适时通过充气泵进行充气是因为[ ]
A.醋酸菌是好氧菌,将酒精变成醋酸时需要氧气参与
B.酵母菌进行酒精发酵时需要O2
C.通气,防止发酵液霉变
D.防止发酵时产生的CO2气体过多而引起发酵瓶爆裂
答案:
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