秦岭羚牛的风采

秦岭羚牛，别名金毛扭角羚，俗名白羊，是亚洲的特有种。羚牛分指名亚种、不丹亚种、四川亚种和秦岭亚种等4个亚种。其中四川亚种和秦岭亚种是我国的特有亚种。由于羚牛在全世界分布狭窄、数量少，世界自然保护同盟（IUCN）将我国特有的两个亚种列入《红皮书》的珍稀级（Rare）中，我国政府也将羚牛列为国家一级重点保护动物。     

梵净山峨眉髭蟾种群现状与保护建议

峨眉髭蟾是我国特有珍稀两栖动物,仅分布于我国四川、重庆、湖南和贵州梵净山等地.为了弄清目前其种群分布情况和受胁迫因素,本课题组对梵净山峨眉髭蟾种群的现状进行了调查.发现梵净山的峨眉髭蟾仅在少数支流还有一定数量蝌蚪分布,成体仅在冷家坝发现1只,可见在梵净山峨眉髭蟾已极度濒危.建议从宣传、保护、监测以及人工繁殖等方面入手对梵净山峨眉髭蟾进行保护.     

四川山鹧鸪生态习性研究进展

四川山鹧鸪（Arborophila rufipectus）是中国西南山地特产珍稀鸟类。由于亚热带阔叶林的破碎化,其种群数量显著下降,故对其生态习性概括既具有理论意义,又具有保护价值。该文基于近10年的大量相关资料,综述了四川山鹧鸪生态习性研究的最新情况,全面介绍了物种的地理分布情况、种群数量、对栖息地的利用、繁殖特征、鸣声特征和保护地位,并对该领域今后应进行的研究提出了建议。     

及时认输

从不认输,常被视为坚强和值得钦佩的人格品质.羚牛便有着这样一种从不认输的品质.羚牛是一种大型食草动物.外形似牛,机体结实又介于山羊和羚羊之间,故称羚牛. 羚牛有着粗大的角,角尖光滑,从头顶先弯向两侧,然后向后上方扭转,角尖向内.体形粗大,四肢粗壮,体长约1.8米,成年羚牛可达到2米以上.体重约300公斤,尾较短,吻鼻部高而弯起,似羊.     

中华鼠耳蝠的分布及研究现状

对分布在四川绵阳的中华鼠耳蝠形态特征进行了描述,结合文献对该物种在中国现有分布区域及研究现状进行了综述.同时指出了该物种在分类上还存在混淆不清的问题,该物种的分类、种群结构、繁殖生态及个体发育等方面还有很大的研究空间.为进一步深入研究中华鼠耳蝠提供参考.     

四川大头茶种群动态研究

四川大头茶(Gordonia acuminata)是我国亚热带西南地区常绿阔叶林优势种之一,材质好,生长快而又未被人注意的一种优良树种。四川大头茶种群在不同林分密度下的纯林中,其胸面积最大增长速度是:中密度>高密度>低密度,达到最大增长速度的径级范围都在18cm左右。种群密度随径级增大而减小。种群空间格局呈集群分布,从幼苗到乔木,其集群程度从大到小。     

牛年大使,谁来当

接到这个任务,安奇奇一开始是拒绝的,因为羚牛给他留下的印象可不怎么好.这种动物身形高大,体重可达300千克,而且脾气暴躁,动不动就会伤人,真称得上是"移动的小坦克".在我国秦岭地区,每年几乎都会发生羚牛伤人的事件.不过,小cool龙打消了他的疑虑——脾气暴躁的,多是在争夺地盘或配偶的战斗中落败的公羚牛,咱们找一头性格温...     

胡杨、灰叶胡杨种群分布及地理关系的研究

研究了胡杨和灰叶胡杨种群的地理分布,阐述了胡杨和灰叶胡杨种群的地理位置变化,探究了它们的扩布机制和种群的进化关系.结果表明:胡杨和灰叶胡杨种群成集中分布型,分布走向与当地河流变化密切,种群具有从南向北的分布趋势.     

文成县野生珍稀植物资源调查初报

对文成县野生珍稀植物资源种类及其分布进行了全面调查 ,该县珍稀植物总计 1 0种 ,其中国家一级保护野生植物 3种、国家二级保护植物 6种、省级珍稀植物 1种。并对该县珍稀植物分布、种群数量、现状及保护价值等进行了论述 ,提出了具体保护建议     

元宝山冷杉种群结构和动态的初步研究

对元宝山冷杉种群的大小结构,存活曲线和水平分布格局及动态的研究表明:元宝山冷杉种群在森林群落中具有增长型的繁殖潜力而表现了衰退型的演替趋势;种群分布格局由集群分布演变为均匀分布.元宝山冷杉种群动态受环境影响相当明显.种群生态学研究对人为调节种群发展具有重要意义.     

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,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

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.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.