具有苦寒降泄，咸能软坚特点的是
A．京大戟
B．大黄
C．芦荟
D．巴豆
E．芒硝
参考答案：E
下列哪味药有补肾益精，益气，养血的功效（）
A.胡桃肉
B.蛤蚧
C.冬虫夏草
D.紫河车
E.黄芪
T - bill yields can be thought of as :（）
A. real risk -free rates because they contain an inflation premium.
B. real rates because they contain an inflation premium.
C. nominal risk -free rates because they contain an inflation premium.
