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【单选题】
对蛋白质沉淀、变性和凝固的关系的叙述,哪正确的
A.
变性的蛋白质一定要凝固
B.
变性的蛋白质一定要沉淀
C.
沉淀的蛋白质必然变性
D.
凝固的蛋白质一定变性
E.
沉淀的蛋白质一定凝固
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