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【简答题】
中国自古有“酒文化之说,酿酒原理家喻户晓,人尽皆知。家庭制作甜酒时,常需将煮好的糯米冷却后,加入酒曲(内含酵母菌)并且需将酿酒的器皿密封。若天气寒冷,还需采取保温措施,请据此完成下列问题。 (1)酒曲中主要含有 等微生物。 (2)加入酒曲的目的是:首先将糯米中的淀粉分解成 ,然后,在酵母菌的作用下,将其分解成 和 。 (3)加入酒曲前,煮熟的糯米冷却到常温,这是为什么? 。____ (4)天气寒冷时,需要保温的的是: 。 (5)酿酒过程中,需将器皿密封的原因是 。 (6)如果密封不好,将会出现什么问题? 。____ (7)在用酵母菌酿酒的过程中,从密封的发酵罐中检测到氧气,二氧化碳和酒精3种化学物质,其浓度变化如图,图中PQR二曲线依次代表什么?P代表 Q代表 R代表 。
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