下列各项中,不具有细胞结构的是() ["细菌和变形虫","烟草花叶病毒和噬菌体","真菌和草履虫","蓝藻和乳酸菌"]
企业网银操作员由()为其添加. ["企业会计主管","企业会计人员","银行端操作员","客户经理"]
离子聚合过程,反应温度将影响()。 ["聚合反应速度","聚合物等规度","A和B","与以上无关"]
中药制剂的薄层色谱鉴别,常采用什么对照品?() ["A、标准制剂","B、药材对照品","C、样品稀释液","D、有效成分对照品","E、对照Rf值"]
直接传播方式有() ["A、触摸、接吻、空气、胎盘传播","B、触摸、接吻、性交、胎盘传播","C、触摸、玩具、性交、胎盘传播","D、餐具、接吻、性交、胎盘传播"]
请简述灸法的作用?