[问答题] 何谓正常菌群与条件致病菌?

主要病原性球菌有哪些? 下列中，哪项不属于血管介入放射学范畴() ["A．栓塞 ","B．药物灌注 ","C．血管内支架 ","D．经皮腔内球囊扩张术 ","E．造影"] 内毒素与外毒素有何主要区别? 何谓消毒、灭菌、无菌技术及防腐? TAI的全称是() ["A．经皮经腔血管成形术","B．脑内支架术","C．经导管血管内灌注化疗术","D．经皮引流术","E．血管内化疗术"] 何谓正常菌群与条件致病菌?