1.用松香3份,蓖麻油2份,混合煮后涂在黑色纸片上,晚上挂在蚊子多的屋角等处,即会粘住许多蚊子。 2.取空酒瓶数只,内装少许浓糖水或啤酒,置于室内蚊子较多的地方。蚊子闻到甜
本文以对羟基苯甲酸,6-溴正己醇,丙烯酰氯,对羟基苯甲醛,苯乙酮等为主要原料合成了一种同时含有液晶基元,光敏基元查尔酮基团,以及柔性间隔基的丙烯酸酯类液晶单体,并通过傅里叶
本文分析了奇数碳原子效应对烷基侧链取代的六苯并蔻盘状液晶分子性能的影响。六苯并蔻由13个镶嵌的苯环组成,是最小的石墨烯单元,同时因为大的π-π相互作用,它拥有强烈的
[摘要]1929年举办的西湖博览会是中国会展史上具有里程碑意义的盛会,在国内外产生了强烈的反响。博览会在组织、宣传、营销等方面均有不少值得称道的地方,尤其是其宣传推广方面的很多做法在今天举办各类博览会时仍有借鉴意义。 [关键词]西湖,博览会,宣传,新闻,广告 [中图分类号]K26 [文献标识码]A [文章编号]0457-6241(2010)10-0037-07 1929年在杭州召开的西湖
Abstr act: The nonlinear dynamic response of axisymmetrical functionally graded material (FGM) circular plate and flat spherical shell was studied applying m
In this paper, an Eulerian-Lagrangian two-phase flow model for liquid-fueled detonations is constructed The gaseous mixture is described by Eulerian method,
In modern warfare earth penetrating weapons are often used to defeat enemys hardened and deeply buried targets such as aircraft shelters and bunkers. Adual
The split tensile test methodology has been established for the concrete spheriform specimens with the principal stress ratio 61:62:63=0.24:0.24一1 in order to
In order to research the influences of different charge aspect ratio on damage effectives of concrete target on explosive effect Three-dimensional finite el
利比里亚发生埃博拉病情后,仿佛一下子到了世界末日,什么药都不管用,什么医生都无能为力。更可怕的是,医生、护士只要接触到了病人和病毒,也有去无回。利比里亚与塞拉利昂共