48.附圖為何種美白技術,其最常用的美白劑成分與濃度為何? 
(A)home-applied technique;10~15% carbamide peroxide
(B)home-applied technique;30~35% hydrogen peroxide
(C)walking bleaching technique;10~15% carbamide peroxide
(D)walking bleaching technique;30~35% hydrogen peroxide
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統計: A(597), B(40), C(56), D(14), E(0) #1633754
統計: A(597), B(40), C(56), D(14), E(0) #1633754