典型铁路工程水土流失情况调查研究

在我国水力侵蚀亚区内选取几条施工中铁路进行现场水力侵蚀实验调查,对铁路施工期水力侵蚀情况调查和研究,并在我国5个水力侵蚀亚区内的铁路施工期水力侵蚀进行人工降雨试验和侵蚀沟调查,研究结果得出5个侵蚀亚区内各铁路工程类型施工期水土流失等级、加速侵蚀因子和侵蚀模数。结论表明,交通工程边坡水力侵蚀程度受施工工程特点影响非常明显,新型构造物的形成将引发严重的土壤侵蚀现象。     

3A Unit 7 Would you like a pie?(Story time)教学设计

<正>课题:小学英语三年级上学期3A Unit7 Would you like a pie?内容简介:本课的教学内容是Unit7 Story time,以Mike介绍他的妹妹给大家认识而展开的话题,在这个过程中学会与新朋友打招呼,以及offer your friends some food。本课时突出学生"介绍朋友"和"认识朋友"的能力及"学会分享"的意识培养,并在这个过程中培养孩子善于交流、主动交际、开朗自信的优秀品质。同时掌握食品类单词an ice-creamr,an egg,a cake,an ice cream,a hot dog和本单元的重点句型Nice to meet you.Would you like…?What about…?及相应回答。目标预设:1.知识目标:(1)能听懂、会说、会读单词:a cake,an ice cream,a hot dog,an egg。(2)能初步听懂、会说、会读句型Would you like…?/What about…?及回答Yes,please.和No,thank you.明白如何询问别人的意见。(3)能读懂理解、会说并且会读Nice to meet you,并且明白回答是Nice to meet you,too.(4)能读懂理解、会说并有感情地表演:Story time,初步学会向他人介绍自己的朋友和主动结交朋友。     

The ‘I see you’ prey–predator signal of Apis cerana is innate

An ‘I see you’ (ISY) prey–predator signal can co-evolve when such a signal benefits both prey and predator. The prey benefits if, by producing the signal, the predator is likely to break off an attack. The predator benefits if it is informed by the signal that the prey is aware of its presence and can break off what is likely to be an unsuccessful and potentially costly hunt. Because the signal and response co-evolve in two species, the behaviour underlying an ISY signal is expected to have a strong genetic component and cannot be entirely learned. An example of an ISY signal is the ‘shimmering’ behaviour performed by Asian hive bee workers in the presence of their predator Vespa velutina. To test the prediction that bee–hornet signalling is heritable, we let honey bee workers of two species emerge in an incubator so that they had never been exposed to V. velutina. In Apis cerana, the shimmering response developed 48 h post-emergence, was strong after 72 h and increased further over 2 weeks. In contrast, A. mellifera, which has evolved in the absence of Asian hornets, did not produce the shimmering signal. In control tests, A. cerana workers exposed to a non-threatening butterfly did not respond with the shimmering signal.     

沈阳市地表水持续稳定达标关键措施与对策探讨

对沈阳市地表水环境特征及水质达标现状进行了分析,论述了地表水变化趋势,提出了实现地表水持续稳定达标的技术路径,要实现地表水环境质量持续稳定达标,必须采取优化经济结构及布局,持续推进污水集中控制,强化污染源治理,实施农村环境综合整治,提升河流生态环境质量和水体自净能力,强化水环境政策制度建设及环境监管等有效措施。     

基层电信企业岗位廉洁风险防控的实践和思考

中共中央纪委《关于加强廉政风险防控的指导意见》将风险管理理论和现代质量管理方法引入反腐倡廉建设,理论基础科学系统,可操作性强,非常切合国有企业基层单位预防腐败的实际。笔者参与了该《意见》的基层实践,认为根据《意见》进行廉洁风险梳理排查,直到每个岗位、每位员工,形成全覆盖责任体系是开展岗位廉洁风险防控最有效的方式,收效非常明显。