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  3. Enzyme systems of mammals and birds are most efficient only within the narrow range around 37℃; a departure of a few degrees fro

Enzyme systems of mammals and birds are most efficient only within the narrow range around 37℃; a departure of a few degrees fro

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问题 Enzyme systems of mammals and birds are most efficient only within the narrow range around 37℃; a departure of a few degrees from this value seriously impairs their functioning.
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答案冠词误用，应把the narrow range中的the改成a。
解析 a range of或a range around为固定搭配，表示“……的范围”。
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