下列疾病发绀不伴有呼吸困难的是() ["气胸","高铁血红蛋白血症","阻塞性肺气肿","肺水肿","肺炎"]
下列选项中,不属于健康保险的险种是()。 ["医疗保险","残疾收入补偿保险","生育保险","工伤保险"]
线衰减系数的SI单位是() ["m-1","cm-1","s-1","s","m2/kg"]
健康保险承保的风险具有的特征不包括()。 ["由于非明显的外来原因造成的","由于非先天原因造成的","由意外原因造成的","由于非长存的原因造成的"]
下列疾病出现的发绀不是肺性发绀的是() ["阻塞性肺气肿","原发性肺动脉高压","肺炎","气胸","Fallot四联症"]
驾驶员连续行车4小时,应该停车休息()