正常人异形精子应小于() ["40%","50%","20%","30%","10%"]
男,37岁,肌体无力、下肢麻木,结合图像,最可能的诊断是() ["脊髓积水征","胸椎退化","未见异常","结核","脊髓内的血管畸形"]
下列哪项对诊断心肺气虚证最有意义() ["咳喘痰多,动则尤甚","喘息短气,呼多吸少","咳喘无力,自汗畏风","咯痰清稀,乏力神疲","自汗乏力,喘咳心悸"]
关于脊髓空洞症:() ["目前尚无特效治疗,一般予对症处理","放射治疗常用131I","张力性空洞可行空洞一蛛网膜下腔分流术","进展缓慢,但预后不佳","空洞较大,伴有椎管梗阻者可行手术治疗"]
疳症的好发年龄哪种说法是正确的() ["3岁以内","4岁以内","5岁以内","6岁以内","任何年龄"]
国家法规要求矿主制定防火和应急预案,该预案应得到主管部门的批准并有机会让()。