39.恆牙上顎第一大臼齒中那個窩(fossa)最小?
(A)近心三角窩(mesial triangular fossa)
(B)遠心三角窩(distal triangular fossa)
(C)遠心窩(distal fossa)
(D)中央窩(central fossa)
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統計: A(90), B(1089), C(568), D(28), E(0) #2866377
統計: A(90), B(1089), C(568), D(28), E(0) #2866377