84 牙本質的樹脂黏著強度與下列那一項成正比? (A) 牙本質小管的管徑(diameter of dentin tubule) (B) 牙本質表面的乾燥度(dryness) (C) 管間牙本質的區域(area of intertubular dentin) (D) 牙本質小管的通透性(permeability of dentin tubule)