急性脊髓炎早期表现为肌张力低、反射低、病理征阴性,最可能的原因是() ["脊髓休克","患者不合作","合并糖尿病","合并周围神经病","查体不准确"]
下列对利多卡因抗心律失常的叙述正确的是() ["降低心肌自律性","抑制K外流","口服吸收好,宜口服给药","缩短动作电位和有效不应期,相对延长有效不应期","用于转复急性心肌梗死或强心苷中毒所致室性心动过速或室颤"]
子宫肌瘤的声像图特点包括()①肌瘤多呈低回声团块,典型的内部回声呈漩涡状;②肿块周围可见假包膜形成的低回声晕圈;③大的肌瘤或多发肌瘤可使子宫增大,形态失常;④浆膜下肌瘤使子宫变形,靠近黏膜的肌瘤可使内膜移位 ["①②③","①③","②④","④","①②③④"]
下述风湿疾病中,哪一项与乙型病毒性肝炎无关() ["超敏感性血管炎(过敏性血管炎)","坏死性肉芽肿","结节性多动脉炎","病毒性肝炎关节炎","干燥综合征"]
抗绿脓杆菌感染有效药物是() ["头孢氨苄","青霉素G","羟氨苄西林","羧苄西林","头孢呋辛"]
钢包预热温度对钢液温度有何影响?