关于进风口的布置要求,应设在室外空气较清洁的地点。进风口处室外空气中有害物浓度不应大于室内工作地点最高容许浓度的() ["30%","80%","50%","10%"]
钻石征见于() ["二尖瓣脱垂","二尖瓣狭窄","大量心包积液","肥厚型心肌病","扩张型心肌病"]
患者女性,16岁,7天前突发左髋剧痛,左下肢活动受限,伴畏寒,高热,全身不适及食欲缺乏,急重病容,体温38.7℃,脉搏100次/分,左大腿近端肿胀,皮温升高,腹股沟韧带中点稍下方深压痛,最可能的诊断是() ["左髋关节急性风湿性关节炎","左髋关节急性化脓性关节炎","左髋关节结核","左大腿软组织炎症","左股骨近端恶性肿瘤"]
SAM征见于() ["二尖瓣脱垂","二尖瓣狭窄","大量心包积液","肥厚型心肌病","扩张型心肌病"]
下列哪些是慢支并发肺气肿的X线表现() ["横膈低平","两肺多发性空洞","两肺纹理增粗紊乱","两肺透亮度减低","肋间隙增宽"]
CIN各级病理分型的依据是什么?