Based on the distribution of Chinese chestnut, the current situation of genetic variation and the resource utilization were descussed. 摘要根據我國板栗資源分布狀況，論述了不同栽培區域遺傳變異趨勢和資源利用現狀。
This essay analyses the problems in developing junior middle school's geography curriculum by surveying the current condition of Baicheng. 通過(guò)對白城市初中地理課程資源開(kāi)發(fā)利用現狀的調查，分析了初中地理課程資源開(kāi)發(fā)利用中存在的問(wèn)題。
