用力呼气时( )。A.膈肌舒张B.膈肌收缩C.肋间外肌舒张D.肋间外肌收缩

作者: rantiku 人气: - 评论: 0
问题 用力呼气时( )。
选项 A.膈肌舒张 B.膈肌收缩 C.肋间外肌舒张 D.肋间外肌收缩
答案 BD
解析

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