胆囊重度增大最可能的原因是() ["梗阻","变异","肝炎","肝硬化","脂肪肝"]
女性,55岁,急性心肌梗死病人,病后4周,左肩强直、疼痛,活动受限,最可能的情况为() ["乳头肌功能不全","心脏破裂","心室膨胀瘤","肩手综合征","颈椎病"]
急性白血病引起贫血,最主要的原因是() ["红细胞寿命缩短","出血","造血原料缺乏","幼稚红细胞的代谢受到白血病细胞异常增生的干扰","无效性红细胞生成"]
翼颌间隙感染主要病因() ["上颌磨牙感染引起","下颌第2磨牙感染引起","下颌第3磨牙根尖感染、冠周炎","下颌前磨牙根尖炎引起","急性扁桃体炎引起"]
聚氯乙烯泡沫塑料具有以下特性()。 ["A、质轻","B、导热系数小","C、耐酸碱","D、不吸水","E、防火性好"]
添加剂泵启动前确认哪些?