治疗消化性溃疡脾胃虚寒证，应首选
A．理中丸合黄芪建中汤B．一贯煎C．化肝煎D．失笑散合丹参饮E．柴胡疏肝散
参考答案：A
He _______ for ten minutes by the time I got there. [ ]
A. has left
B. left
C. has been away
D. had been away
“双轨制”在中国社会发生作用，形成了规则之间的不一致，但两套规则的内部是统一的。
