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【单选题】
眶下间隙感染来源中，不包括A.
上颌骨骨髓炎
B.
上颌第一前磨牙化脓性炎症
C.
上颌尖牙化脓性炎症
D.
上颌第二磨牙根尖化脓性炎症
E.
上唇底部化脓性炎症
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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