Ca3Co2O6是一种很有潜力的氧化物热电材料。研究了柠檬酸盐溶胶凝胶法制备Ca3Co2O6氧化物粉末，并应用TG／DSC、XRD和sEM等方法进行了测试研究。干凝胶在700℃煅烧就可以生成片状
<正> 近年来,随着联产承包责任制的实行,农村中商品生产和商品交换发展很快,出现了各种形式的商业服务公司。商业服务公司的出现,改变了流通渠道单一的状况,活跃了城乡经济,方便了群众。与此同时,农村供销社体制改革正在进行。改革之后,恢复了它的合作性质,扩大了经营范围和服务领域,从而使农村商品流通状况有了较大改善。这里提出一个问题:供销社体制改革以后,各种形式的商业服务公司还有没有存在的必要。对此,大致有
本文探讨了高职院的招生工作现状,就如何做好高职院的招生工作这一问题,阐述了自己的观点和看法,并对高职院招生形势进行了分析,供大家研究讨论.
General situation of the seawater intrusion in Kiaochow Bay region was analyzed.Current status of the seawater intrusion and its formation mechanism,influence f
[Objective]The research aimed to study HCH persistence in Jiaozhou Bay.[Method]Based on the investigation data in Jiaozhou Bay in April,August,September and Oct
【正】 齐鲁书社新近出版的《蒲松龄事迹著述新考》一书,是山东大学袁世硕教授1979年以来撰写的蒲松龄与《聊斋志异》研究的论文结集.书分上下两编,十八篇,三十余万字.这部论
[Objective]The study aimed to discuss the temporal and spatial variation of phytoplankton community and main pollution indicators in cyanophyte enrichment area
The key to global climate justice is how to define or distribute greenhouse-gas( sometimes abbreviated to GHG) emissions rights in different countries. Three qu
The concepts of project activity and environmental ethics are analyzed. It indicates that project activity is a kind of " creation" event transforming nature,an