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【Abstract】Abstract： Some sports injuries often occur in students participating in sports because of lack of attention. ......

Objective To explore on the immunity of live attenuated Japanese Encephalitis (JE) vaccine (SA14-14-2) to different wil......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

[目的]为河北省区域试验提供后备品系。[方法]以郑单958为对照,通过对河北省农业科研单位提供的92个优良玉米杂交组合进行田间观察......