53.牙齒主體部分由下列何者形成?
(A)原生牙本質(primary dentin)
(B)繼生牙本質(secondary dentin)
(C)三級牙本質(tertiary dentin)
(D)修復性牙本質(reparative dentin)
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統計: A(500), B(91), C(0), D(1), E(0) #1511648
統計: A(500), B(91), C(0), D(1), E(0) #1511648