股票A和股票B的部分年度资料如下:计算股票A和股票B的协方差(保留四位小数)。
参考答案:
股票A的平均收益率=126%/6=21%股票B的平均收益率=144%/6=24%
A: Martine, congratulations on your winning such a great award. B: ______
A.Oh, do you really think so
B.All the honor should go to my colleagues.
C.You know, I have stayed up very late recently.
D.I have great confidence to win this time.
根据所提供的图像,该病例的最可能的诊断为()
A.胰腺癌
B.肾上腺癌
C.胃肠道间质瘤
D.假性囊肿
E.以上都不是