题目内容
平滑面菌斑分为如下三层
2021-11-17
A.细菌层、间质层、菌斑表层
B.菌斑一牙界面、中间层、菌斑表层
C.基质层、中间层、菌斑表层
D.基质层、细菌层、菌斑表层
E.基质层、中间层、细菌层
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