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【单选题】
下列关于脂肪酸的说法,不正确的是( )A.
脂肪酸由一分子甘油和三分子的脂肪酸缩合而成
B.
根据碳原子价的不同可将脂肪酸分为两大类,饱和脂肪酸和不饱和脂肪酸
C.
脂肪酸是由脂肪与有机酸组合而成
D.
人体内不能合成而必须从食物中提取的脂肪酸称必需脂肪酸
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