题目内容
以下哪些描述与维生素C相符
2021-10-19
A.结构中含内酯,为L(+)-苏阿糖型
B.水溶液pH值大约8.2
C.可以生酮式-烯醇式互变
D.水溶液易被空气氧化
E.临床用于防治坏血病,预防冠心病
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