A.1/8B.1/4C.1/6D.1/7
A.鼻底-口裂點(diǎn)B.口裂點(diǎn)-頦上點(diǎn)C.頦上點(diǎn)-頦下點(diǎn)D.鼻下點(diǎn)-頦下點(diǎn)
A.發(fā)緣點(diǎn)-眉間點(diǎn)B.鼻下點(diǎn)-頦下點(diǎn)C.鼻底-口裂點(diǎn)D.眉間點(diǎn)-鼻下點(diǎn)