Dear Admission Committee:
Miss Pan Bei requested a letter of recommendation from me to support her application for graduate program at your university. As her teacher, I am pleased to comply with her request.
I first got to know Miss Pan when she enrolled at university and I was the assistant director of her class at that time. Being a professor for several years, I noticed that due to the lack of self-learning ability, it is really challenging for students, even those performing excellent in senior school, to keep up with the college speed. However, as a diligent girl without any solid background in Computer Science before college, she adapted quickly to the especially competitive environment in our department. At the end of the first year, she earned the 5th rank in her class, while ranking 1st among the girls. I was fairly impressed by her self-learning technique and exceptional efforts. Hence, I believe, goal-oriented, not afraid of inchoateness and with persistence, she has the quality to make achievements.
What distinguished her among her classmates, I think, was that she went far beyond acquiring excellent scores in the exams and instead got her range of knowledge enlarged. In spring, 2006, Miss Pan took the course I taught named Algebraic Structures and Combinatorial Mathematics. This inquisitive and assiduous young woman was sometimes the last to leave after my class, raising novel questions related to the subject. I found that she understood the knowledge in depth and detail. Furthermore, I still remember during the spring vocation in May, due to the break-down of my mail box, I missed her mails to discussing some questions. But the following week during the course time, she asked me directly. Her zeal for knowledge and the spirit to explore answers really leave me a deep impression. Finally, she was among the few students who got almost full marks in every test in class which showed her exceeding grasp of every chapter. Thus, I gave her 98/100 for the excellent performance in my course.
In summary, I have every reason to believe that Miss. Pan will make outstanding performance at your university as a graduate. I would appreciate greatly if you give her a favorable consideration. Please feel free to contact me directly if more assistance is needed. Faithfully yours,
Wanling Qu, Professor
Department of Computer Science and technology Peking University
Email: qwku.edu.cn
My mother
My mother is very kind and beautiful although she is not tall.She is 42 years old this year.She is a nurse,so she is always very busy day and night.But she loves her job,and she often takes care of her patients.Of course,she also likes singing,dancing,cooking and shopping,but she almost no time to do them.
Oh,I love my mother.
描写妈妈的英语作文:
I have a great mother. She cares much about me in my life and study.
In the morning, she gets up early to make breakfast for me. When I was little, she prepared my schoolbag. But now, she tells me to do it by myself. Because she thinks I have been old enough to do it. Besides, she always checks my homework. When I finish my homework, she checks it and points out the mistakes. She is very careful and helps me a lot.
I love my mother.
随着工业时代的来临,人类科学技术水平的不断提高,人与自然的关系发生了逆转,人成了强者,而“温和的自然”却成了容易受伤的对象。高科技既给我们的生活提供极大的方便,也给我们带来了忧虑——环境污染。地球一次次在给人类提醒:“保护环境,为我们传造一个美丽的家园!”
1、高度提纯的化学制剂,如***虫剂、油漆、洗涤剂等对自然环境构成了重大威胁。如油漆,油漆材料中含有各种溶剂苯、二甲苯,硝基漆中稀释剂乙醇、丁醇等亦有毒施工中挥发出现溶剂蒸气,浓度高时对人体神经有较严重刺激和危害性。低浓度时也有头痛、恶心、疲劳和腹痛等现象。在长期接触中会使食欲减退,损坏造血系统,发生慢性中毒。但是只要注意加强防护,尽量防止油漆接触皮肤,如有可能要多加开窗通风及早让室内空气散发。
2、卫生条件的改善使人口急剧增加,人类活动大量破坏了地球的森林和湿地资源。世界人口增长率的急剧上升和人口基数呈指数增长的现状。其重要标志为:人口翻番的时间越来越短,世界人口从5亿增到10亿用了200余年;从10亿增至20亿用了100多年,从20亿到40亿不到70年,估计再翻一番只需35年。本世纪人口在每10年间的增长数也在上升。近代人口迅速增长的原因是:生活条件和医疗技术全面改善,死亡率下降,人类平均寿命不断提高。目前世界人口有50%在25岁以下,这种年龄结构属于典型的增长型,它决定人口在今后相当长时期内保持增长势头。由于地球的空间和资源都有限,控制人口实为刻不容缓的任务。目前,全球荒漠化土地面积已经达到3600万平方千米,占陆地总面积的1/4,而且每年仍以5万~7万平方千米的速度在扩展。这个“杰作”的创造者是人类。
于是,“温和的自然”变为“凶恶的自然”,人类施加给它的,它最终都要归还人类。人类均供水自1970年来开始减少,而且持续下降。目前60%的大陆面临淡水资源不足,100多个国家严重缺水,其中缺水十分严重的国家达40多个。预计未来20年,全球人均供水将减少1/3。石油资源一旦枯竭,人类的生活质量和社会的正常运转必定遇到问题:人类消耗石化燃料,如石油、煤炭、天然气等,造成大气中二氧升高。由于温室效应的影响,北极地区的冰盖已减少了42%。近100年来海洋面上升了50厘米。如果温室效应继续下去,海洋面在上升50厘米,全球30%的人口就得迁移……
如果人类持续现在的行为而不做任何改变,那么到21世纪结束的时候,地球上的物种会减少一半。那么到了最后,受伤害的终归于地球的破坏者——人类。
我们只有一个地球,这是人类赖以生存的唯一家园。与自然和谐相处,共同发展,是我们共同的心愿。让我们擦干地球爷爷的泪水,联合起来,保护地球吧!
月华如水,悄然浸满窗楣,银晃晃的月光带着爱久长存的清凉,斑驳了一片朦胧的树影,在窗边绣出一片微凉。好怀念啊,这是曾经。
岁月不居,时间如流。如今的这儿……荒莺一片,寸草不生。究竟是该怪城市高速发展、时代变迁,还是该怪人类目空一切、自私自利。
物是人非,到处是高楼大厦,到处是川流不息的汽车,到处是嘈杂的声音。河流上漂浮着化学残物,鱼儿了无踪影,连顽强的小草也在现实面前低了头。从前的孩子绕着古树奔跑玩耍,而现在,只剩下了树桩。湛蓝的天空在无息中褪色,街上依旧热闹非凡。好像一切都变了,又好像一切都没变。
人类可能从未想过,自己无端的行为,对这片土地造成了多大的伤害。随着时代的变迁,人们的购物量越来越大,“塑料袋”就此横空出世。但它的到来也带来了十分严重的污染:白色污染正在席着地球,这是一次性塑料袋对环境的污染。
如今大量的新闻材料反映:在泥土里埋塑料袋的现象很高。许多爱护环境的人士都十分愤怒,却无法追根溯源,为什么呢?因为它已经被理下很久了,那为什么没有分解呢?原来,它们是不降解材料,需要整整200年才能被分解掉。如果通过焚烧的方式来处理就会释放出许多有害物质,百害而无一利。人类向往的当是“塑料土地”?!
“东方欲晓,莫道君行早。踏遍青山人未老,风景这边独好。”岁月悠长,你我无恙,愿山河再复当年模样。
保护环境,从身边的小事做起,我们的生活环境就会变得更美好。只要保护大自然,大自然会更爱我们的。我为周围环境的恶化而感到心痛,我想:作为未来接班人的青少年,保护环境,人人有责,我们如果不了解人类环境的构成和环境污染问题的严重性,无视有关环境保护的法律法规,不去增强环境保护意识,自觉履行保护环境的义务的话,我们的生命将毁在自己的手中,老天将对我们作出严厉的惩罚。
为此我下定决心要从我做起爱护环境,保护我们这个赖以生存的家园,做一个保护环境的卫士。让我们携起手来,为蓝天白云、绿水青山、清新空气、优美环境而努力奋斗吧!从今年开始,我要和爸爸妈妈一起去种树,会更有意义。如果每个人过生日都种上一棵树或一株竹子的话,几年以后就会绿树成荫,竹子成林了。
环境是我们人类生存最基本的条件,如果我们破坏了环境,这等于破坏了我们生存的条件。目前,生态环境日益恶劣,对我们影响最大的就是水资源、空气和食品等都不同程度的受到了污染。
这里的垃圾什么时候才能搬掉?这是人们向记者诉苦说。是啊!像垃圾袋等塑料用品,不但不会腐烂,而且也对人的身体健康造成影响。你看!那里的垃圾已经堆成了山。
看到这些,我想:我们每个人都要快点想办法来美化环境。想什么办法呢?对了,现在买菜时候都是用塑料袋的,如果改用篮子的话,那么环境的污染也会减少一些的。一次性筷子、一次性塑料饭盒,不仅会污染环境,而且每年要浪费许多木材,如果用我们平常的碗筷,进行严格的消毒后反复使用,就可以节约木材,减少污染。日常用的垃圾桶应该多放几个,一个桶放可回收的垃圾,像菜皮、果皮可以做肥料,纸屑、破布可以进行再加工,重新使用,另一个桶放不可回收的垃圾。在我们日常生活中,一条条清澈的小溪被污染,变成了臭气熏天的水沟;一株株美丽的花草树木被污染,变得黑乎乎的即将凋谢;一棵棵高大的大树在一阵隆隆的机器声中倒下……这些残酷的画面,就是人类可恶的“杰作”!
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