74.附圖中白色箭頭所指的倒三角形為何種解剖構造？
(A)zygomatic process of maxilla
(B)pterygomaxillary fissure
(C)maxillary tuberosity
(D)floor of the orbit

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統計： A(0), B(12), C(0), D(0), E(0) #3974553