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第l期纯方位系统定位与跟踪的观测器最优机动轨迹………………………………………………………………………许志刚(1)商品最佳销售策略的数学模型…………………………………………………………………………………………黄迎秋(5)锌柱还原分光光度法测定添加剂中微量砷…………
The first phase of the purely azimuth system positioning and tracking the optimal trajectory of the observer .................................................................................... Xu Zhigang (1) the best products Mathematical model of sales strategy ...................................................................................... Huang Yingqiu (5) Determination of zinc column reduction spectrophotometry Additive trace arsenic ............