题目内容
慢支伴小气道阻塞时，最早出现的肺功能改变是
2021-12-09
A.流M-容积曲线降低
B.残气容积增加
C.闭合容量减小
D.肺最大通气量降低
E.第1秒肺活量占用力肺活ft的比值减小
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