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【多选题】
在财务管理中，衡量风险大小的有（）A.
变异系数
B.
期望值
C.
标准差
D.
无风险报酬率
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【单选题】FPD中像素尺寸是
A.
0.139 mm×0.139 mm
B.
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C.
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D.
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A.
clearness
B.
conciseness
C.
correctness
D.
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【多选题】What are the advantages of the smart grid?
A.
saving money
B.
increase reliability
C.
reducing the chance of power outages
D.
making the environment cleaner
E.
creating more jobs
F.
capitalizing on new technolgygies
G.
providing more services for customers
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