简介:<正>IfirstvisitedBeijingin1987.OvertheyearsIhavewatchedChinatransformingintoavibrantconsumersoci-ety.Beijingtodayreflectsmod-ernChina.Thecitywillchangerapidlyduringthenext5years.However,thecityhasshownthatenvironmentandmaintain-inglinkswiththepastareveryimportant.Itismyhopethatoverseaspeoplewillvisitthecityandseewiththeirowneyeswhathasbeenachieved.
简介:Mr.Chairman,DistinguishedMembersoftheCommittee,Firstofall,Iwouldliketoextend,onbehalfoftheChinesedelegation,ourgreetingsandrespectstoallthedistin-guishedmembersoftheCommittee.TheCommitteehasmadeenormouseortsandplayedanimportantroleinpromot-ingthepurposesandprinciplesoftheConventionandreinforcingtheglobaleortstobanandpreventtorture.TheChineseGovernmentappreciatesyourendeavorandwillcontinuetosupporttheworkoftheCommittee.
简介:石膏的种类很多,但用于制作立体模型的石膏主要是α—半水石膏与β—半水石膏。β—半水石膏以材料低廉、来源广泛、技术成熟而被广泛运用,也早已为刑事技术部门在侦破案件中采用。但对于α—半水石膏,很多从事现场勘查的同志却不大熟悉。一、α—半水石膏的特点及与β—半水石膏的区别。常用的β—半水石膏是普通模型石膏的主要部分,而α—半水石膏是高强模型石膏的主要成分。α型与β型半水石膏虽然在微观结构上相似,但其宏观特性却相差很大。概括起来,它们的差别主要有以下几点:1、在结晶形态上的差别。用扫描电镜观察表明,α型半水石膏是致密的、完整的、粗
简介:E-mailandthe“GoldenBridgeProject”inChinaChinalookstothefutureofcommunications.INAPRIL,1995,ZhuLing,a21-year-oldstudentintheDe...