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【判断题】
玻璃、陶瓷、纸、塑料、碳等都是绝缘材料。（）A.
正确
B.
错误
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A.
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B.
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C.
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【单选题】What is the relationship between weighted aggregative index and weighted average index?
A.
Both of them can be applied to either comprehensive or incomplete information
B.
Under the condition of fixed weight, there is a deformation relationship between the two types of indexes
C.
Under certain weight conditions, there is a deformation relationship between the two types of indexes
D.
Under general conditions, there is a deformation relationship between the two types of indexes
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A.
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B.
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C.
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D.
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