单项选择题
A.25 628 B.28 8.69 C.32 652 D.35 847
A.71.13,2.8 B.71.13,2.6 C.71.15,2.8 D.71.15,2.6
A.15.6%~85% B.18.2%~22.6% C.7.85%~92.8% D.7.74~35.31%