肝气郁结者可见()
A.胸闷气喘
B.胸闷刺痛
C.胸闷胁胀
D.胸闷痰多
E.胸闷气短
参考答案:C
— What are you doing?
— I am _____________ on the beach.[ ]
A. sit
B. sits
C. sitting
社会问题的基本特征?