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【单选题】
有关热能的说法,不正确的是A.
人体消耗的热能主要靠食物中的碳水化合物、脂肪和蛋白质提供
B.
健康的成年人,摄人的热能与所消耗的热能应保持平衡
C.
热能系数是指每100克碳水化合物、脂肪和蛋白在体内氧化产生的热能值
D.
食物在体内氧化生成的二氧化碳与同时消耗的氧的体积比称为呼吸商
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