《南京条约》中规定开放的五个通商口岸分别是_______、_______、_______、_______、_______。
广州；厦门；福州；宁波；上海
Doctors warn people that one may develop skin cancer with his skin ________ to the sun too much.
A．exposes
B．exposing
C．exposed
D．being exposed
气管右偏，左胸叩诊为实音，应考虑（）
A.右侧胸腔积液
B.左侧胸腔积液
C.左肺肺炎
D.肺气肿
E.左侧肺不张
