植物欣赏

岩须（封底1）：杜鹃花科高山特有物种,低矮灌木,生于有＂植物王国＂之称的滇西北高原。适应于高寒气候,岩须叶片已经退化成鳞片状,花弯垂,花萼紫红色,花冠雪白,钟状,宛如一盏晶莹剔透的白玉小灯笼。2012年,华南植物园将岩须引入温暖湿润的南国花城,这位＂冰山上的来客＂在两个月后开出了一朵希望之花。岩须非但花高贵脱俗,同时也是一味名贵的中草药,有行气止痛、安神之功效,人称＂草灵芝＂。     

缙云黄芩(Scutellaria tsinyunensis)形态分化研究

本文以重庆市缙云山特有植物给云黄芩(Scutellaria tsinyunensis)为研究对象,从生态学的角度,运用方差分析方法,对不同生境下缙云黄芩7个种群70个个体的36项形态特征进行了研究。结果表明:缙云黄芩的形态特征在同一种群内部和不同种群之间都有一定程度的分化;在所研究的36项形态性状中,有77.8％的性状表现出在种群之间差异显著,其中有61.1％的性状差异极显著。     

农村学生作文如何写出农村特色

作文教学要努力做到“真”、“实”、“活”、“新”，而对于生活在农村的学生，生在农村，长在农村，接触的是一个广阔的农村天地，这一广阔天地为我们农村学生作文提供了宝贵的素材。因此，我们只要能好好地把握住农村作文教学的特有优势，在指导思路上能始终贯穿一个“农”字，农村作文教学同样能闯出一番新天地。     

如何在音乐课堂上渗透德育

<正>苏联著名音乐理论家苏霍姆林斯基指出:"音乐教育不是音乐家的教育,而首先是人的教育。"是面向全体学生,通过音乐教育的特有形式、手段,培养出高尚完美——追求真善美的现代人。培养学生学习音乐的良好态度,引导学生积极参与音乐活动,丰富情感体验,使学生具有感受、表     

中国种子植物特有属的数量分析

Chinese flora with many endemic elements is highly important in the world’s flora. According to recent statistics there are about 196 genera of spermatophytes, be- ing 6.5% of total Chinese genera.  These endemic genera comprising 377 species belong to 68 families, among which the Gesneriaceae (28 genera), Umbelliferae (13), Compo- sitae (13), Orchidaceae (12) and Labiatae (10) are predominant.  The tropical type containing 24 families and 80 genera is dominant. After it follows the temperate type with 23 families and 50 genera.  There are also 4 families endemic to China, i.e. Gin- kgoaceae, Bretschneideraceae, Eucommiaceae and Davidiaceae.  It shows that genera endemic to China are obviously related to the tropical and temperate flora in essence.      The endemic monotypic genera (139) and endemic obligotypic genera (48) combin- ed make up more than 95% of the total number of genera endemic to China.  Phylo- genetically more than half of them are ancient or primitive.  The life forms of all ende- mic genera are also diverse.  Herbs, especially perennial herbs, prevail with the propor- tion of about 62%, and trees and shrubs are the next, with 33%, and the rest are lianas.       Based upon the calculated number of genera endemic to China in each province and the similarity coefficents between any two provinces, some conclusions may be drawn as follows:       Yunnan and Sichuan Provinces combined are the distribution centre of genera en- demic to China and may be their original or  differentiation area,  because  numerous endemic genera, including various groups, exist in these two provinces.  The second is Guizhou where there are 62 endemic genera.  Others form a declining order, south China, central China and east China. But towards the north China endemic genera de- crease gradually, and the Qinling Range is an important distributional limit.       The largest simitarity coefficient, over 50%, appears between Shaanxi and Gansu probably because of the Qinling Range linking these two provinces.  But between any other two provinces it is less than 30% and it is generaly larger between two south pro- vinces than between two north provinces.       These characteristics mentioned above are correlated with topography and climate, and they may be resulted from the diversification in geography and climatic influence for a long time.     

正确认识马克思的经济学理论与资本主义发展的关系——兼谈马克思的"丧钟论"与"扬弃论"的关系

马克思的经济学理论是关于资本主义发展的理论,一百多年来的资本主义发展,在一些最重要的方面证实了马克思对于资本主义的理论分析.同时,现代资本主义的变化并没有改变资本主义生产方式的内核,马克思在理论上所揭示的各种经济规律仍然会发生作用.马克思关于资本主义发展历史趋势所提出的"丧钟论"与关于股份公司和股份资本性质所提出的"扬弃论"讨论的是两个完全不同的问题,彼此之间并不存在矛盾.     

统计学

专业解读 简单地说,统计学研究的目的就是寻求各种现象变动的规律性,预测未来。统计学主要分为一般统计和经济统计两类专业方向。一般统计主要是对统计学的基本理论和方法进行研究;经济统计则是根据调查、搜集而得的经济信息,以及描述、分析经济数据并对社会经济运行过程进行预测、监督的一门科学。统计学可以帮助生产者认识市场、认识自身,以求得生存和发展,也能帮助各级管理部门依据现行经济规律进行宏观决策、调控、监测,以实现社会经济良性运行。