基台的穿龈高度应为( )A.1~5mm B.1~7mm C.2~5mm D.2~8mm E.3~9mm

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问题 基台的穿龈高度应为(   )

选项 A.1~5mm
B.1~7mm
C.2~5mm
D.2~8mm
E.3~9mm

答案A

解析
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