单选题:前伸牙合时后牙尖的工作斜面是(  )

题目内容:
前伸牙合时后牙尖的工作斜面是(  ) A.上牙颊尖的远中斜面
B.上牙颊尖的舌斜面
C.上牙舌尖的颊斜面
D.上牙颊舌尖的颊斜面
E.上牙颊尖的近中斜面
参考答案:
答案解析:

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Ⅱ度松动的牙松动方向不是(  )

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Dr. Wilson asks Wang to do a little more research before dec

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