My brother's birthday is May ______.[ ]
A. fifteen
B. fifty
C. fifteenth
D. fiftieth
答案:C
当给定利率及终值时,取得终值的时间越长,该终值的现值就越低。( )
心悸不安,精神涣散,多由下列何种因素引起()
A.喜伤心
B.怒伤肝
C.思伤脾
D.悲伤肺
E.恐伤肾