问题
单项选择题
Which one of the following isn’t located in the superior mediastinum ？（）
A．trachea
B．superior vena cava
C．brachiocephalic v.
D．vagus n.
E．greater splanchnic n.
答案
参考答案：E
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Which one of the following isn’t located in the superior mediastinum ？（）
A．trachea
B．superior vena cava
C．brachiocephalic v.
D．vagus n.
E．greater splanchnic n.
参考答案：E