核算要算包括（）。
A.会计凭证
B.会计核算专用印章
C.会计账簿
D.权限卡
参考答案：A, B, C
Which of the following is least likely a disadvantage of a callable bond to an investor The:（）
A. investor is exposed to reinvestment rate risk.
B. cash flow pattern of a callable bond is not known with certainty.
C. issue often offers a higher coupon rate than a comparable option-free bond.
在市场经济中，( )已成为反映经济运行状况的重要标志。
A．就业率
B．控制人口数量
C．人口素质
D．失业率
