A.唇齦溝橫切口進(jìn)路 B.鼻前庭橫切口進(jìn)路 C.鼻側(cè)切口進(jìn)路 D.鼻前庭縱切口進(jìn)路 E.鼻前庭橫切口進(jìn)路
A.10% B.20% C.30% D.50% E.60%
A.1%~5% B.5%~10% C.10%~20% D.20%~25% E.30%~35%