正确答案:

50%以上

C

题目：能源物质在体内氧化所释放的能时迅速转化为热能者占总量的（ ）。

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延伸阅读的答案和解析：

[单选题]请根据以下内容回答 60～64 题

An organ of higher plants， usually subterranean and having several functions，including the absorption and conduction of water and dissolved minerals， food storage，and anchorage of the plant in the soil. It is distinguished from the stem by its structure，by the manner in which it is formed， and by the lack of such appendages as buds and leaves.

[单选题]《中国药典》(2005年版)收载的甾体激素类原料药物的鉴别方法大多采用（ ）。

IR

[单选题]下列粉尘的理化特性何者致纤维化作用意义最大

粉尘的化学成分和粉尘浓度

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