用蔗糖、奶粉和经蛋白酶水解后的玉米胚芽液,通过乳酸菌发酵可生

用蔗糖、奶粉和经蛋白酶水解后的玉米胚芽液,通过乳酸菌发酵可生产新型酸奶,下列相关叙述错误的是

A.蔗糖消耗量与乳酸生成量呈正相关    B.酸奶出现明显气泡说明有杂菌污染

C.应选择处于对数期的乳酸菌接种      D.只有奶粉为乳酸菌发酵提供氮源

答案

D

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