正常新生儿下列哪项体征可以呈阳性反应() ["A．克氏征","B．巴氏征","C．布氏征","D．佛斯特征","E．奥氏征"] 喉返神经麻痹患者可以出现以下哪些症状() ["A．声嘶","B．喉痛","C．呛咳","D．呼吸困难","E．吞咽困难"] 尿亚硝酸盐试验检出率受哪些因素影响? 临床上喉感觉神经性疾病的诊断要点是() ["A．长期不适的喉部感觉异常病史","B．喉镜检查无明显异常发现","C．充分排除器质性病变","D．暗示治疗有效","E．动态喉镜观察异常"] 新生儿的神经反射，哪项为正常() ["A．觅食反射阳性","B．拥抱反射阴性","C．握持反射阳性","D．巴宾斯基征阳性","E．交叉伸腿反射阴性"] 尿亚硝酸盐检查为什么可以协助诊断尿路感染?