功能清热生津，除烦止呕的药物是( )
A．知母
B．黄连
C．石膏
D．芦根
E．天花粉
参考答案：D
— Are you going to Beijing by plane?
— It's fast, but expensive. So I am not sure. I_____ take a train. [ ]
A. should
B. may
C. must
D. will
谷坛上的祈年殿高达多少米？其殿顶采用哪种形制？
