问题
单项选择题
关于拔牙体位，拔除下颌牙时下颌牙咬
平面与地面所成角度是（）
A.与地面平行
B.15°
C.30°
D.45°
E.60°
答案
参考答案：A
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关于拔牙体位，拔除下颌牙时下颌牙咬平面与地面所成角度是（）
A.与地面平行
B.15°
C.30°
D.45°
E.60°
参考答案：A
| 从方框中选出能完成对话的最佳选项。 | |
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