单项选择题
A.5.0%B.2.0%C.1.5%D.0.75%
A.0.80-1.00B.0.80-1.10C.1.00-1.20D.0.80-1.20
A.15.2%B.12.1%C.15.23%D.12.14%
A.0.001gB.0.01gC.0.1gD.1g
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