单选题：Howdoeshumanbodykeepthecorewarminextremecoldaccordingtothepa

题目分类：英语六级
题目类型：单选题
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题目内容：

Howdoeshumanbodykeepthecorewarminextremecoldaccordingtothepassage? A．Constrictbloodsupplytothecentre.
B．Reducebloodflowintheouterregions.
C．Keepitswarmbloodclosetotheskin.
D．Speedupthebody'sbloodflow.

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