[名词解释] 苷键

家畜、家禽等动物疾病中最常见的致病因素是（） ["机械性因素","物理性因素","化学性因素","生物性因素","营养因素"] 评价消毒灭菌是否彻底的指标是破坏（）。 ["荚膜","芽胞","鞭毛","菌毛","异染颗粒"] 背景材料： 病理学的主要任务不包括（） ["胚胎形成","病理变化","病因学","发病学","疾病转归"] 肺炎球菌可形成（）。 ["荚膜","芽胞","鞭毛","菌毛","异染颗粒"] 苷键