A.0<|r|≤0.3 B.0.3<|r|≤0.5 C.0.5<|r|≤0.8 D.0.8<|r|<1
A.30% B.50% C.60% D.75%
A.工業(yè)類指數(shù) B.金融類指數(shù) C.公用事業(yè)類指數(shù) D.綜合類指數(shù)