易导致大出血的消化性溃疡,最常见的部位是
A.幽门
B.胃小弯
C.十二指肠下段
D.十二指肠球部后壁
参考答案:D
I hope ________ a good time on weekends. [ ]
A. to have
B. having
C. have
D. has
生用清热泻火,煅用收湿敛疮的药是()。
A.石膏
B.知母
C.磁石
D.龙骨
E.黄连