烤瓷熔附金属全冠(PFM)在前牙的切端应磨除()
A.0.3~0.5mm
B.0.5~1.0mm
C.1.0~1.5mm
D.2.0mm
E.3.0mm
参考答案:D
In part of China, some people still have difficulty gaining to social services.
A.approach
B.help
C.access
D.benefit
用陶瓷刀片切削时,冷却剂可为()。
A.水
B.乳化液
C.任意液体
D.不用冷却液