题目内容

l、在胸部经第5、第6胸椎椎间盘的水平断面上,见不到

A. 升主动脉
B. 上腔静脉
C. 左肺动脉
D. 气管隆嵴
E. 胸腺

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下列肺段中,右肺横断层面上先出现的肺段是:

A. 内侧段
B. 外侧段
C. 内侧底段
D. 外侧底段
E. 前底段

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