根据设备ABC分类法，B类设备数量应占设备总数的（）
A.10%左右
B.30%左右
C.50%左右
D.75%左右
参考答案：B
An analyst does research about common probability distributions. If an investment product's continuously compounded return is normally distributed, the future investment product's price is most likely:（）
A. binomially distributed.
B. normally distributed.
C. lognormally distributed.
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