呼吸困难的病史采集要点。
下列哪项叙述是DNA是遗传物质的有力论据() ["蛋白质是一切生命活动的体现者","染色体是遗传物质的主要载体","加热杀死的S型细菌促成了R型细菌的转化","T2噬菌体侵染细菌的实验中,亲代和子代噬菌体之间具有连续性的物质只有DNA"]
脊髓完全缺血多少时间会造成脊髓不可逆损害() ["4min","10min","15min","30min","40min"]
胎头的最小径线是() ["枕上前囟径","双顶径","矢状缝","枕下前囟径","枕额径"]
脊髓休克时受损节段以下出现() ["肌张力增高","感觉消失","病理反射阴性","小便障碍","腱反射消失"]
呼吸困难的伴随症状。