题目内容

正确的说法是

A. 1摩尔H2占有体积约为22.4升
B. 氧气在标准状况下，占有体积约为22.4升
C. 1摩尔氧气在标准状况下，占有体积约为22.4升
D. 标准状况下，1摩尔水占有体积约为22.4升
E. 32克氧气在标准状况下，占有体积约为44.8升

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蛋白质紫外吸收的描述不正确的是

A. 吸收波长为280nm
B. 因为含有酪氨酸
C. 因为含有色氨酸
D. 可用于蛋白质含量测定
E. 吸收波长为256nm

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