食品中菌落总数是食品的什么标志() ["酸败程度","腐败程度","食品质量","清洁状态","生物性污染程度"]
对于脐带,哪项是不恰当的() ["妊娠足月(40周末),脐带一般长度为50cm","脐带有两根脐动脉和一根脐静脉","脐带表面有羊膜包围","脐静脉的氧分压低于脐动脉","脐带杂音的速率与胎心音率同"]
关于突触前抑制的叙述,正确的是() ["突触前膜超极化","突触后膜超极化","突触前膜去极化","突触后膜去极化","没有神经递质参与"]
患儿,3岁,因先天性尿道下裂行修补术,首选的麻醉方式是()。 ["腰麻","局麻","基础麻醉+骶麻","气管内全麻","全凭静脉麻醉"]
积滞多见于() ["新生儿","婴幼儿","幼童","学龄儿童","青春期"]
何谓迟发性运动障碍?