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通过机械性、技术性媒介传播信息,传播者与受传者之间的关系是()...
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患者,男,40岁。教师职业,低热伴乏力、食欲缺乏及消瘦月余。因血友病有多次血制品输注史。体查见唇周苍白,口腔黏膜布满白色...
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单选题下列可引起菌血症的细菌是()A 霍乱弧菌B 肠炎沙门菌C 伤寒沙门菌D 大肠埃希菌E 志贺痢疾杆菌...
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了解机体的细胞免疫状态,用于评价T淋巴细胞功能的试验是()...
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