He had a good time on New Years Eve.
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用于控制不合格率、废品率、交货延迟率、缺勤率、邮电、铁道部门的各种差错率的控制图是()。
A. c控制图
B. u控制图
C. p控制图
D. np控制图
Which of the following is a convertible security？______.
A kind of equity convertible into a bond.
B. A bond secured on assets which may be converted into other, better quality assets.
C. A bond which can be converted on pre-fixed terms into equity.
D. A fixed-rate bond that continues to exist after its option to buy shares has been exercised.
用pH梯度萃取法分离，5%.NaHCO3，萃取层可分离得到的是E．
甲企业2004年12月31日存货的账面余额为312000元,预计可变现净值为296400元。2005年12月31日存货的账面余额仍为312000元,预计可变现净值为327600元。则2005年末应冲减的存货跌价准备为()元。
A. 15600
B. 31200
C. 140400
D. 46800
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