少阴病"脉微细，但欲寐"反映的病机是（）
A.寒热错杂
B.正虚邪实
C.气血不足
D.心肾虚衰
E.阴阳俱虚
参考答案：C, D, E
— How much money did you pay for the drink?
— None. It was ______.[ ]
A. easy
B. free
C. cheap
D. expensive
食管癌两侧水平对穿野常用于()
A、根治治疗
B、术前放疗
C、术后放疗
D、单纯放疗
E、姑息放疗
