单项选择题
A.5.8%,1.45% B.6.7%,1.45% C.5.8%,2.28% D.6.7%,2.28%
A.3 160 B.3 560 C.3 240 D.3 370
A.0.139 8 B.0.142 7 C.0.125 6 D.0.140 2