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【单选题】
咯血时出血部位不可能位于A.
气管
B.
肺
C.
胃
D.
喉
E.
支气管
拍照语音搜题，微信中搜索"皮皮学"使用
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【简答题】My wife said in her letter that she would appreciate ________ from you sometime. A) to have heard B) to hear C) having heard D) hearing
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