问题
单项选择题 A1/A2型题
位于口腔前庭内相当于原中切牙近中交界线的延长线上的解剖标志是（）。
A.舌系带
B.上唇系带
C.颊系带
D.口轮匝肌的起始部
E.上颌义齿切迹
答案
参考答案：B
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位于口腔前庭内相当于原中切牙近中交界线的延长线上的解剖标志是（）。
A.舌系带
B.上唇系带
C.颊系带
D.口轮匝肌的起始部
E.上颌义齿切迹
参考答案：B
| 完型填空。 |
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