三江口自然保护区光叶珙桐种群调查和形态学研究

光叶珙桐是我国特有的单种属植物珙桐的变种,为国家一级濒危保护植物.在调查的基础上讨论三江口自然保护区分布的光叶珙桐的外部形态、内部结构和繁殖生长等特性,初步分析了其濒危原因.     

滇西南种子植物区系新记录

滇西南新记录的植物有10种,即木兰科(Magnoliaceae)的长蕊木兰(Alcimandra cathcartii)、盖裂木(Talauma hodgsoni)和大果木莲(Manglietia grandis),防己科(Menispermaceae)的藤枣(Eleutharrhena macrocarpa),葫芦科(Cucurbitaceae)的棒锤瓜(Neoalsomitra integrifoliola),山茶科(Theaceae)的石山紫茎(Stewartia calcicola),梧桐科(Sterculiaceae)的景东翅子树(Pterospermum kingtungense),蝶形花科(Papilionaceae)的香槐(Cladrastis wilsonii),蓝果树科(Nyssaceae)的云南蓝果树(Nyssa yunnanensis),五加科(Araliaceae)的异叶鹅掌柴(Schefflera diversifoliolata),隶属于8科10属.其中有三种国家I级重点保护野生植物:长蕊木兰、藤枣和云南蓝果树;两种国家II级重点保护野生植物:大果木莲和景东翅子树.     

雷公山自然保护区的保护植物

雷公山国家级自然保护区保护植物有28种.其中,一级有红豆杉、南方红豆杉、金佛兰等6种;二级有柔毛油杉、秃杉、翠柏、福建柏等22种.对保护植物的利用价值进行了初步的评述.     

厚朴简介

厚朴是现存被子植物中最为原始的种类之一,为国家二级濒危保护植物。本文从厚朴形态、分布、药用价值等几个方面进行介绍,希望引起人们的关注,加强对厚朴资源的研究和保护。     

人工繁殖红豆杉获得成功

红豆杉又称紫杉，是一类古老的植物类群，全世界有11种，分布于北半球的温带至热带地区，是属于第四纪冰期遗留下来的古老树种，现已濒临灭绝，被许多国家列为一级保护树种，我国将其列为一级重点保护植物。红豆杉的根、茎、叶、皮及种子中均含有紫杉醇。     

珙桐生理学研究进展

珙桐(Davidia involucrate Baill)是中国特有的单属单种植物,国家一级保护物种,具有重要的学术、经济价值.因其分布范围窄、适应性弱、种子萌发率较低,人为破坏严重,使其有濒临灭绝的危险.致其引种、异地保护困难,进一步的开发和利用不能深入进行.珙桐的抗性生理、种子休眠、萌发生理等的研究进展,为珙桐的引种驯化,提高其种子萌发、幼苗成活等提供一定的理论基础.     

濒危植物南方红豆杉的研究进展

南方红豆杉特产于中国，属第三纪孑遗树种．为国家Ⅰ级保护植物，主要分布于广东、广西、江西、河南、陕西、甘肃、台湾和山西等省（区）的山地。南方红豆杉是集材用、药用、观赏、绿化于一体的珍稀树神，特剐是它的体内含有天然抗癌药物——紫杉辞而倍受世人瞩目，目前已处于濒危状态。对于南方红豆杉的研究国内外已开展了大量工作，包括形态解剖学研究、植物生理生化研究（包括营养繁殖苗的培育、种子萌发特性、紫杉醇的提取分离等）；此外，南方红豆杉在临床上的应用也是研究的热点之一。文章在前人研究的基础上，综述了关于南方红豆杉植物的研究现状及发展趋势，旨在为该物种的保护生物学提供理论依据。     

昆明世博园的六大专题展园

树木园 树木园位于世博园中部,占地面积25400平方米。园内移栽各种植物70余科300余种,共计2万多株。分为木兰科种植区、珍稀濒危植物栽培区、经济林区、森林植物种质资源区等4个区。树木园内栽培了珙桐、云南红豆杉、秃杉、苏铁等国家一级保护植物10余种。     

诱人的大熊山

大熊山森林公园,位于新化县北部,林地面积17.69万亩,山中蕴藏着极其丰富的森林资源和动植物资源,是湘中唯一物种基因宝库。现有植物1859种,其中属国家保护的银杏、南方红豆杉、钟萼木等珍稀植物43种,千岁银杏,十人合抱,枝繁叶茂,湖南之王。百载翠松,挺拔云霄,高者46米,中华之冠。天然原始次生林,深谷幽幽,青山隐隐,     

雷公山自然保护区的保护植物

雷公山国家级自然保护区保护植物有28种．其中，一级有红豆杉、南方红豆杉、金佛兰等6种；二级有柔毛油杉、秃杉、翠柏、福建柏等22种．对保护植物的利用价值进行了初步的评述．     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

Social and Cultural Influence on Word Meaning

Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Where the Action Is: How Drama Contributes to the Art of the Teaching and Learning of English

This paper looks at the way drama works to bring a model of an arts curriculum into reality. He also shows how drama is valuable when discussed as a separate, autonomous subject in the school curriculum as opposed to one subsumed within English. He argues for a view of the arts and gives an example of a sequence of work in an English GCSE class based around Arthur Miller's play View from the Bridge. From this he draws out several strands about the relationship of the drama curriculum to the individual students and teachers, the school, and to culture. He also emphasises the primacy of performance in drama education.