中纵隔内有（）
A.膈
B.迷走神经
C.胸廓上口
D.胸腺
E.膈神经
参考答案：E
______ Chinese international medical relief team was sent to the 7.0-magnitude quake-hit areas in ______Southwest China's Sichuan province the moment it happened.
A．A; the
B．The; the
C．A; /
D．The; /
生态等值种
