高中英语入学教学之浅谈 --中国期刊网 关键词】英语教学；平稳过渡；衔接 [gap=412]Key words】The teaching of English；The steady transition；Link up
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In this period, it is a very important subject of this transition period to optimize the boundary pillars of open mine bottom, for it works on many aspects, like the smooth transition of mine production and safety in production.
矿山由露天开采向井下开采过渡过程较复杂,对露天底境界顶柱进行优化是这个过渡期很重要的课题,它涉及到矿山生产的平稳过渡和安全生产等多个方面。
参考来源 - 大杏山铁矿露天转井下境界顶柱优化研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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