When the external air pressure is relatively lower than the internal pressure, the air flows into the alveoli through the respiratory tract._精华吧

When the external air pressure is relatively lower than the internal pressure, the air flows into the alveoli through the respiratory tract.

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When the external air pressure is relatively lower than the internal pressure, the air flows into the alveoli through the respiratory tract.

A.正确

B.错误

正确答案：错误

Tag：动物解剖生理时间：2021-12-25 22:23:04

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