正常龈沟的深度为A.2mm B.1mm C.0.15~0.38mm D.0~3mm E.0.05~0.38mm

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问题 正常龈沟的深度为

选项 A.2mm
B.1mm
C.0.15~0.38mm
D.0~3mm
E.0.05~0.38mm

答案D

解析
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