[目的]研究喷泉周围空气负离子的变化规律。[方法]以江西农业大学校区内的喷泉为研究对象，对其周围空气负离子水平进行测定。[结果]......

The Mongolian gerbil has been widely used in many research fields and has been reported to be a diurnal laboratory anima......