A.對(duì)中—整平 B.精平—對(duì)中 C.初平—對(duì)中—精平 D.對(duì)中—初平—精平
A.13.688 B.16.312 C.16.401 D.17.713
A.1~5% B.5~10% C.10~15% D.15~20%