A.6mm B.3~4mm C.8mm D.4~6mm E.7~10mm 侧腭杆离龈缘的距离为

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问题 A.6mm
B.3~4mm
C.8mm
D.4~6mm
E.7~10mm
侧腭杆离龈缘的距离为

选项 A、 
B、 
C、 
D、 
E、 

答案D

解析
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