单项选择题
A.0.89‰ B.92.7% C.87.5% D.0.49‰ E.0.40‰
A.13.7 B.87.5% C.0.49‰ D.0.89‰ E.92.7%
A.0.40‰ B.0.89‰ C.92.7% D.87.5% E.0.49‰