温经汤中配伍半夏的用意是（）
A.和胃降逆而止呕
B.降逆散结而消痞
C.化痰开胃而行津
D.通降胃气而散结
E.燥湿化痰而和胃
参考答案：D
—Would you help me______ this math problem, Mr Lin? It's too hard for me.
—OK. Let me try. [ ]
A. look after
B. work out
C. think of
D. put on
行业的利润达到最大化的阶段是( )。
A．启动阶段B．成长阶段C．成熟阶段D．衰退阶段
