23.下列何種裝置不是固定式的二級矯正器(fixed Class II corrector)?
(A)Herbst
(B)Bionator
(C)MARA
(D)Forsus
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統計: A(29), B(723), C(61), D(48), E(0) #3134610
統計: A(29), B(723), C(61), D(48), E(0) #3134610