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哪个是带漂移项的随机游走模型?()……

哪个是带漂移项的随机游走模型?()

A.ARIMA(0,1,0)Yt=Yt-1
B.ARIMA(0,1,0)Yt=Yt-1+Et
C.ARIMA(0,1,0)Yt=U+Yt-1+Et
D.ARIMA(0,1,0)Yt=U+Yt-1