如何做好隧道内的事故救援?
下列哪项症状或体征有助于鉴别左心衰竭和支气管哮喘() ["进行性呼吸困难","端坐呼吸","末梢性水肿","交替脉和奔马律","泡沫痰"]
胆总管探查及引流术适用于下列哪些情况() ["急、慢性胆管炎","有黄疸或黄疸史","胆总管增粗增厚","肝、胆管结石","多发的胆总管结石"]
COPD病人继发肺气肿后其咳嗽的特点是() ["白天多于夜间","夜间多于白天","白天和黑夜相同咳嗽","常大声咳嗽","咳嗽时常伴有胸痛"]
对发病早期SAH患者脑脊液的描述正确的是() ["可见均匀一致的血性脑脊液","压力多无增高","汤和氯化物多正常","红白细胞比例大约是700:1","蛋白质含量多升高"]
说明逼轨器的构造及作用?