With the rapid development of modern agriculture,agricultural non-point source pollution becomes increasingly serious in China,improving farmers’ environmental
【正】Objective To investigate the clinical characteristics and therapeutic of head trauma patients with skull defect. Methods A retrospective study of clinical
950407 The relationship between Guillain-Barre syn-drome and type 2 poliomyelitis virus in Hebeiprovince.Gao Yulin(高玉林),et al.Dept Neurol,2ndAffili Hosp,Hebe
From the perspective of forest resources change,this article uses comparative analysis and panel data regression to study the woodland use efficiency from fores