瑞氏综合征（ReyeSyndrome）的病理改变主要发生在（）
A.脑和肺
B.肝和心
C.脑和肝
D.脑和肾
E.肺和心
参考答案：C
湿邪头痛的特点是（）
A.头痛喜冷
B.头痛如劈
C.头晕胀痛
D.头痛连齿
E.头痛如裹
Mr Black ___China since the summer of 1998. [ ]
A. has been to
B. has been in
C. has come to
D. came to
