10 有關氟化物的防齲機轉主要來自於下列哪一種效益?(A) 萌發前與局部性(Pre-eruptive and topical)(B) 萌發前與系統性(Pre-eruptive and systemic)(C) 萌發後與局部性(Post-eruptive and topical)(D) 萌發後與系統性(Post-eruptive and systemic)