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The air in the lungs changes through ________.

单选题
2022-01-02 13:51
A、inhaling some amount of oxygen
B、the evaporation of moisture
C、exhaling some amount of carbon dioxide
D、generating a passage for evaporation Part IV
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正确答案
B
试题解析
B
定位：根据题干中的信息词air和changes定位到最后一段最后三句。
解析：关于空气在肺部的改变方式，第四段最后三句说“它会以以下三种方式被改变：(1)空气中约有五分之一的氧气进入血液中。(2)差不多等量的二氧化碳从血液进入空气中。(3)气道及肺泡黏膜中的水分会蒸发，直到空气几乎饱和为止。”将这三点与四个选项一一对照，可知只有B项与原文相符，故为正确答案。
标签： 英语六级 外语考试
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