46.人類牙本質與牙釉質的交界呈下列何種形狀?
(A)三角形(triangular shape)
(B)S形(S-shape)
(C)直線形(linear shape)
(D)波浪形(scalloped shape)
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統計: A(28), B(256), C(123), D(1697), E(0) #2181020
統計: A(28), B(256), C(123), D(1697), E(0) #2181020