题目内容：
食物的氧热价是指
A.1g食物氧化时消耗的氧量
B.食物氧化时，消耗1L氧所产生的热量
C.1g食物氧化时所产生的热量
D.食物氧化时，消耗1ml氧所产生的热量
E.食物氧化生成1LCO2时所产生的热量
参考答案：
选择题：食物的氧热价是指
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