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【单选题】
某患者右下颌角骨折，x线片示骨折线位于角前切迹，关于其骨折移位的可能性，哪一项是正确的A.
骨折移位可能发生窒息
B.
前骨折段向下内移位，后上移位
C.
前骨折上移位，后段向下内移位
D.
前骨折后移位
E.
不发生移位
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