Finally , spatial temporal speed figure was introduced to help find the headstream of congest.介绍了用时空速度变化图寻找拥挤源头以及选择交通控制措施的方法.Lichuan locates along the Yi River , headstream of Qingjiang River.夷水河畔、清江源头、龙船古韵 、 风情种种.Teachi...
本文着重讨论了卤代硅烷醇解反应的机理 、 条件与应用.In this paper the mechanism, conditions and alcoholysis reaction about halogenatedsilane were emphatically discusser.讨论了利用硫代二丙腈直接醇解合成抗氧剂DLTP的方法,筛选出了最佳反应条件.The method of preparing antioxidant DL...