[名词解释] 必需氨基酸

新生儿败血症的突出特点是() ["A．持续高热","B．白细胞总数增高","C．皮肤损伤","D．往往缺乏“典型”症状","E．有宫内、产道感染"] 声带癌侵犯声门下的标准是肿瘤向下超过声带突() ["A．2mm","B．3mm","C．4mm","D．5mm","E．6mm"] 寒者热之 必需脂肪酸 新生儿感染多发生在() ["A．产前，经胎盘血液感染","B．产前，吸人污染的羊水","C．旧法接生","D．产时，吸人污染的产道分泌物","E．生后，与感染者或带菌者密切接触"] 必需氨基酸