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【单选题】
下图关于“探究酵母菌细胞呼吸的方式”的探究，说法不正确的是 [ ]A.
酵母菌常被用作研究细胞呼吸的实验材料，其主要原因是酵母菌属于兼性厌氧生物
B.
在有氧呼吸的装置中，可将空气直接通入酵母菌的培养液
C.
酵母菌呼吸产生的CO 2 可使溴麝香草酚蓝水溶液由蓝变绿再变黄
D.
酵母菌呼吸产生的酒精在酸性条件下能与橙色的重铬酸钾溶液反应变成灰绿色
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B.
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C.
正态分布仅有一条曲线
D.
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E.
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B.
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D.
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