A.鼻腔、鼻甲、鼻道 B.外鼻、鼻前庭、固有鼻腔 C.前組鼻竇、后組鼻竇 D.外鼻、鼻腔、鼻竇 E.以上都是
A.經(jīng)濟(jì)B.安全C.發(fā)展D.主權(quán)
A.出發(fā)點(diǎn)B.維持點(diǎn)C.立足點(diǎn)D.基礎(chǔ)點(diǎn)