题目内容

气体交换只在肺泡周围进行。

A. 对
B. 错

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气体交换是用一个肺泡中的氧气与一个肺泡毛细血管的二氧化碳进行交换。

A. 对
B. 错

肺泡进行气体交换的原理是肺泡与肺泡中的气体(氧气和二氧化碳)存在浓度差。

A. 对
B. 错

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