男,50岁。慢性咳嗽3年余,多于冬天发生。近日又有咳嗽,痰白粘。右下肺听诊有何异常发现() ["肺泡呼吸音增强","支气管呼吸音","支气管肺泡呼吸音","湿啰音","支气管肺泡呼吸音+湿啰音"]
根尖狭窄部距牙齿实际的根尖部为() ["0.1~0.2mm","0.3~0.4mm","0.5~1.0mm","1.2~1.5mm","1.6~2.0mm"]
椎管内麻醉血压下降的主要原因是() ["肌肉松弛","心交感神经节阻滞","交感神经阻滞","副交感神经阻滞","中枢交感神经介质释放减少"]
应与女性膀胱憩室鉴别的病变是() ["卵巢囊肿","卵巢肿瘤","异位妊娠","盆腔炎症","盆腔肿瘤"]
按照《献血法》规定,国家提倡健康公民自愿献血的年龄要求是() ["18周岁至60周岁","16周岁至60周岁","20周岁至60周岁","18周岁至50周岁","18周岁至55周岁"]
减压阀的作用有哪些?