题目内容
下列关于平静呼吸过程的叙述，正确的是
2021-12-28
A.肺通气的原动力是肺内压
B.平静呼吸时，吸气是主动过程，呼气为被动过程
C.呼气时，肺内压低于大气压
D.吸气时，肺内压大于大气压
E.吸气末和呼气末肺内压等于胸内压
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