问题
选择题
Judy, don't put your keys here. _____, please. [ ]
A.Put them away
B.Put up them
C.Put them up
D.Put away them
答案
答案:A
Judy, don't put your keys here. _____, please. [ ]
A.Put them away
B.Put up them
C.Put them up
D.Put away them
答案:A
已知两个投资项目A、B的收益率和标准差:
项目A | 项目B | |
收益率 | 0.03 | 0.04 |
标准差 | 0.02 | 0.08 |
A.项目B更好,因为它的收益率更高
B.两个投资项目A、B的收益率和标准差:
项目A | 项目B | |
收益率 | 0.03 | 0.04 |
标准差 | 0.02 | 0.08 |
C.项目A更好,因为它的标准差更小
D.AB两个项目无法比较,因为它们的标准差不同
E.项目B的风险要比项目A更大
F.项目A更好,因为它的变异系数更小