单项选择题
A.唇龈沟横切口进路 B.鼻前庭横切口进路 C.鼻侧切口进路 D.鼻前庭纵切口进路 E.鼻前庭横切口进路
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%
A.1% B.7% C.17% D.27% E.37%
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