能补脾肺之气，又补肾涩精的药物是（）
A.人参
B.西洋参
C.党参
D.黄芪
E.山药
参考答案：E
They offered ________ prices for her paintings, which made her parents and teacher surprised but happy.[ ]
A. unbelievable
B. acceptable
C. agreeable
D. sociable
脐静脉插管的保留时间一般为（）
A.3天
B.5天
C.7天
D.10天
E.15天
