taxa相关论文
A phylogeny of the Korean Echinochloa taxa derived from nuclear DNA internal transcribed spacer regi
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The phylogenetic relationship of Hexapoda has been debated for a long time, which will be resolved mainly depending on t......
New fossil eccoptarthrids (Coleoptera: Curculionoidea) from the Yixian Formation of western Liaoning
One new genus and three new species of the weevil family Eccoptarthridae (Curculionoidea), Leptocar polychaetus gen. et ......
水电开发属于资本密集型和技术密集型产业,又是国民经济发展基础产业,固定资产投入大。我国水电开发的总体税赋较高,特别是增值税......
将采自贵州省各主要地州县的白发藓属Ｌｅｕｃｏｂｒｙｕｍ，标本１８７号，鉴定出本属植物９种１变种，其中糙叶白发藓Ｌ．ｓｃａｂｅｒｕｌｕｍ Ｃａｒｄ。为贵州的首次记录。在参考在并文献和本次研究......
本文发表了产于云南昭通地区的竹子7新种和1新变型:少刺方竹Chimonobambusa paucispinosa,荆竹Qiongzhuea montig-ena,棱纹玉山竹Y......
我国个人所得税制实施至今,对国民经济的发展起到了不可替代的作用,同时也日益暴露其不足之处.本文就如何改进现行税制,提出五种改......
目的研究香榧假种皮二萜类成分.方法采用低压柱层析、中压柱层析等色谱技术对香榧假种皮的二氯甲烷萃取部分进行分离,用1HNMR、13C......
<正> 新记录属1 大戟科铁苋菜属Acalypha L.Sp.Pl.1003.1753.铁苋菜A.australis L.Sp.Pl.1004.1753;Pojark.in Fl.URSS 14:299.t.1......
文中用光学显微镜观察湿地藓属植物配子体和孢子体的外观形态、细胞形态以及解剖结构,并根据本属各种植物的主要特征对其进行分类.......
Responses of different biodiversity indices to subsampling efforts in lotic macroinvertebrate assemb
As a less time-consuming procedure,subsampling technology has been widely used in biological monitoring and assessment p......
The combined effects of climate change and human pressure have led to the progressive degradation of natural resources i......
Comparative Morphology and Identification of Disassociated Crocodiliform Osteoderms from the Upper C
Since 1993,Many hundreds of isolated crocodileform osteoderms have been recovered from the Maevarano Formation of Northw......
From 2000 to 2019,11,895 new names or new additions to the Chinese vascular flora were proposed by 4226 individuals(4086......
本文建立了一个静态税收可计算一般均衡 (CGE)模型 ,模拟中国的经济运行情况。在此基础上 ,从流转税制和所得税制两种不同类型的税......
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