用气体动力学理论分析了子母弹抛撒技术.Cluster warhead dispersing technique is analyzed with gas dynamic theory.建立了火箭子母弹距离修正系统的弹道理论与算法.Build the theory and arithmetic of distance correction system.子母弹药的应用与发展带来了严重的未爆弹药问题.With cargo projectil...
地衣是一种绿藻或蓝藻与一种真菌共生的形式.Lichen is a form in which green or bluegreen algae and a fungus live together symbiotically.但金与其通常的共生元素在树叶中并不是组合共生的.However, no intergrowth of the paragenetic elements was observed in plants.委内瑞拉和古巴仍...