心音是心室收缩与舒张时产生的的声音。第一心音是( )时产生的音响。A.心室舒张B.心房收缩 C.心房舒张D.心室收缩

作者: rantiku 人气: - 评论: 0
问题 心音是心室收缩与舒张时产生的的声音。第一心音是( )时产生的音响。
选项 A.心室舒张 B.心房收缩 C.心房舒张 D.心室收缩
答案 D
解析

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