大学英语作文三级【一】
那是三年级放暑假的一天，我在家里煮绿豆粥。我先把一小碗绿豆洗干净，放入电饭煲，然后倒上半锅水，插上开关。但是当我半个小时再去看时，却发现电饭煲里的绿豆原封不动，连水的温度也丝毫没变。我仔细检查了一下电饭煲的开关插头，没有发现一些破绽。
正当我百思不解的时候，我看到了墙角的工具袋。那可是爸爸的“好朋友”，里面发着许多电家伙。平时，我看爸爸摸这摸那的，总觉得十分好奇。但爸爸不让我玩，说这很危险。现在电饭煲坏了，我何不趁机用这些家伙来修一修呢？想到这儿，一手拿着电饭煲插头，一手握住螺丝刀，用力转了起来。不一会儿，螺丝拧开了。我把那黑黑得得塑料壳打开一看，好家伙，原来里面的铜丝断了，怪不得电饭煲不肯工作呢！我立即伸出手去，毫不犹豫地抓住了铜丝，我的手臂猛烈地颤抖起来。我明白自己触电了，连忙把铜丝甩开。刚才手上那种痛麻木感这才慢慢地消失，但我的心还在怦怦直跳。过了一会儿，我仔细查看了一下，原来电饭煲的插头的另一边还插在电源插座上呢！
经过这次危险的经历后，我明白了：用电时千万千万注意安全，如用湿的手插或拔插头，大家一定要避免。我再也不敢随便乱摸电线、开关了，更不敢擅自用电家伙“修理”电器了！
大学英语作文三级【二】
信头是指发信人的姓名(单位名称、地址和日期，一般写在信纸的右上角。一般公函或商业信函的信纸上都印有单位或公司的名称、地址、电话号码等，因此就只需在信头下面的右边写上写信日期就可以了。
英文地址的写法与中文完全不同，地址的名称按从小到大的顺序：第一行写门牌号码和街名;第二行写县、市、省、州、邮编、国名;然后再写日期。标点符号一般在每一行的末尾都不用，但在每一行的之间，该用的还要用，例如在写日期的时候。
其中日期的写法，如1997年7月30日，英文为：july 30，1997(最为普遍;july 30th，1997;30th july，1997等。1997不可写成97。
大学英语作文三级【三】
yesterday i read a book the name of the book is《dr bethune》.
dr bethune was a famous doctor from canada. in 1938 he came to china. at that time china was at war with japan. he worked as a doctor in the chinese army and saved many soldiers’ lives. he worked very hard and became sick. dr bethune died in 1939. he was only 49 years old. he was a good man and we remember him today.
i think the book is very very good!
written by wu qingxiang
mar. 31
how to do research
——reading after a science paper
these days i am busy preparing my dissertation which is about web usage mining . i read some english papers and learnt much from them . and now i want to say something about a paper titled “web usage mining：discovery and applications of usage patterns from web data”.
this is the first english paper i read about dissertation and gave me great help .
this paper is a review about web usage mining. it introduced web usage mining in detail . although it is a little old for it was published in its contents are very useful today . it is organized according to the sequence of web usage mining and the six main parts are introduction which tells me what is web usage mining the sources and abstraction of web data the three steps of web usage mining taxonomy and project survey websift overview privacy issues . the third and fourth parts are most important . it had a list of existing project about web usage mining which i saw many times in other papers but this paper is the one creating this list . besides it has been referred for more then twenty times . as we all know that the higher the referred number is the more important the paper is so i consider this paper to be an important and successful one in this region.
in my opinion the success of this paper dues to three reasons . the first reason is the profound computer knowledge owned by the authors . web usage mining relates to many subjects such as artificial intelligence ontology semantic analysis but the most basic knowledge is computer science . the four authors are all professors of department of computer science and engineering in university of minnesota . for myself i am not major in computer science and i am not very good at computers so i feel a little difficult to understand technologies used in this region.
second they had read a large number of papers before they wrote this paper . there are fifty nine references listed after main contents . “stand on the shoulders of giants” this sentence tell us a truth : one can never successful all by oneself . and what’s more learn from others can save a lot of time and energy especially for us new learner . how to learn from others is a skill all of us should master but learning doesn’t mean copy or plagiary . other people’s knowledge and production is just our foundation upon this foundation we must have our own thoughts and creation. there are many remarks in this paper where referred other’s production.
third the authors had the experience of developing a web usage mining project . they don’t just engage in idle theorizing so their comprehension on this issue is greatly profound. they know what we may meet in a real project development and they know how to resolve them . after reading this paper i also read some other papers written in chinese . some of them are not based on real project and can not give useful resolution . websift is the name of system they developed which can be used to data mining and analysis .
i wrote this article not only because it gave me much help in preparing my dissertation but also because it tells me how to study and how to do research . honesty and preciseness are two essential making a researcher must have . hard-working is the necessary condition leading to success . this is just the beginning of my dissertation i should learn from these four authors both their knowledge and their attitude to study.
