三级价格歧视
心理健康教育的终极目标是() ["防治心理疾病,增进心理健康","优化心理素质,促进全面发展","开发心理潜能,达到自我实现","治疗精神疾病,提高全民素质"]
机体处于安静状态时平静而顺利的呼吸动作被称为()? ["平静呼吸","静态呼吸","主动呼吸","被动呼吸"]
密切接触麻疹患者的儿童可注射() ["麻疹减毒活疫苗","抗毒素","类毒素","胎盘球蛋白","转移因子"]
目前三元复合驱的主剂是()类表活剂。 ["石油磺酸盐","烷基苯磺酸盐","生物","石油羧酸盐"]
养鱼周期的概念?