36.如圖所示,在近心-咬合窩洞製備(MO tooth preparation)中,下列何者不會與牙齦壁(gingival wall)相 連? (A)頰側壁(buccal wall) (B)舌側壁(lingual wall) (C)軸壁(axial wall) (D)髓壁(pulpal wall)