单项选择题
A.>0.08 B.>0.1 C.>0.2 D.>0.5
A.>0.05 B.<0.08 C.<0.1 D.>0.15
A.0.1%~0.2% B.0.2%~0.4% C.0.3%~0.6% D.0.4%~0.8%
A.5% B.3% C.2% D.1%
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