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【单选题】
日常生活中，到化学知识．下列说法错误的是（ ）A.
构成人体蛋白质的20多种氨基酸都能通过人体自身合成
B.
维生素C高温时容易被破坏，所以不宜热锅爆炒蔬菜
C.
可用燃烧的方法鉴别真丝围巾和合成纤维围巾
D.
某些铁盐溶于水生成的Fe（OH） 3 胶体，可除去水中的悬浮颗粒等杂质
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D.
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