This paper systematkally researched the characteristics of growth and physiology of sophora viciifolia hance ( a kind of natural shrub ) and its effects on the content of soil water , soil nutrieftt and soil physical property . the paper applied some methods and theory of plant ecology , plant physiology , physics of soil and soil chemistry etc . three different age s . viciifolia hance in the different plot were selected , caraganar land and fallow land as a comparison 本文以陕北黄土区安塞纸坊沟流域内在植被演替中占有重要地位的天然灌木种( 6 、 14 、 17龄)狼牙刺( sopharaviciifoliahance )为对象，以15龄柠条( caraganar )和撂荒地为对照，系统研究了狼牙刺的生长特征、生理特性，及其生长对土壤水分、土壤养分、土壤物理性状的影响。
With the increase of lateral pressure modulus , the magnitude of principal stress decreases and the direction of it is hardly changeable ; with the increase of the angle between the direction of the maximal horizontal principal stress on magnitude and the fault bearing , the magnitude of principal stress increase and its direction can hardly change ; with the increase of the elastic modulus of rocks , the magnitude of principal stress increases and the direction changes more ; with the increase of pr , the magnitude of principal stress decreases and the direction changes more ; with the increase of lateral pressure modulus , the principal stress at hance , the tress at topmost arch , bottom arch and principal stress at lateral arch decreases , with the increase of the depth of tunnel , the stress of surrounding rock also increases , and the poorer the quality of surrounding rock is , the little its principle stress is 分析得出，随着侧压力系数的增大，主应力量值减小，主应力方位难改变；随着与断层走向的夹角增大，主应力量值增大，应力方向难改变：随着岩石的弹性模量的增大，主应力量值增大，方向变化越大；随着泊松比的增大，主应力量值减小，方位变化越大。随着侧压力系数的增大，顶、底拱处的各应力值增大，拱腰处的主应力减小，剪应力增大，侧拱处的各主应力减小，同一侧压力系数的条件下围岩质量越差，各应力值也越小；随着洞室埋深的增加，围岩压力也增大，围岩质量越差，其应力值也减小。
The author puts emphasis on tw ' o aspects , courses design a11d exam principles . moreover , some reform ideas are presented on how to hance the system of the " three plus x " exam mode , establishment of ethical training system and proposition principles , emphasis on the assessment of students " potential abilities and so on . as for the reform of admission system , the tendency of the would - be autonomous admission system is discussed 关于考试形式，本文提出了设置民间考试机构，实行统一考试与高校自主考试相结合的选拔方式等措施；关于考试内容改革，本文主要论述了科目设置和命题原则两方面，就进一步深化“ 3 + x ”考试科目改革、构建德育评价体系及注重考察学生潜在能力等问题提出了改革构想。
In this paper , the brief history and the current condition in the classification of the genus acer linn . have been reviewed . i have also compared the precision of the ancestors ' studies and then studied the classificating evidence , the law of origin and evolution and geographical distribution . by identifying and studying the specimens , 1 ensure that there lie 20 species and subspecies and 8 varieties which belong to 3 subgenus in henan province . i add 3 species and 2 varieties which were not recorded in flora of henan such as acer tegnentosum maxim . a . tsinglingense fang et hsieh , a . shensiense fang , a . buergerianum miq . var . ningpoense ( hance ) rehd 作者通过对河南槭属植物的分类研究，确认了本省槭属植物共计20种、 1亚种和8个变种，隶属于3亚属12组，增补了《河南植物志》中未记载的但河南有自然分布的3个种、 2个变种：青楷槭acertegnentosummaxim .秦岭槭a . tsinglingensefangethsieh 、陕西槭a . shensiensefang 、宁波三角槭a . buergerianummiq . var . ningpoense ( hance ) rehd .和蒿苹四蕊槭a . tetramerumpaxvar . haopingensefang .订正了《河南植物志》和《河南种子植物检索表》中一些分类学问题。
Based on the morphological and phytochemical investigations , comparative studies on the antidepressant action of the ethanol extracts of hypericum perforatum linn > h . faberi r . keller and h . sampsonii hance ( sect . hypericum ) were conducted . the forced swimming and mouse - tail suspension tests in mice show that the extracts from these 3 species have antidepressant actions 在形态学研究和化学研究基础上，对贯叶连翘及与之亲缘关系相近的贯叶连翘组扬子小连翘、元宝草醇提物的抗抑郁作用进行比较研究，采用小鼠尾悬挂试验、强迫游泳试验，结果表明三者均可对抗小鼠的失望行为，具有抗抑郁作用。
