标签：theory 相关文章
40 Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ni
新概念优美背诵短文50篇
In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produc
新东方现代文背诵篇章
Part I A. key words:invent vocabulary:fax/ calendar/ puppet Mercedes-Benz 1.People in England made the first computer. It was built in 1943. It was made to help England understand secret messages during World War two. 2.Someone in Australia invented
Step by Step2000
Nicolaus Copernicus was frightened and his mind was confused. Although he had tried to ignore them, all his mathematical calculations led to the same conclusion: that the earth was not the centre of the solar system. Only if you put the sun there di
高中二年级英语
In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic
考研背诵50篇
Dear friend,all theory is grey but the precious tree of life is green.------Johann Wolfgang von Goethe 亲爱的朋友，所有的理论都是灰色的；而宝贵的生活之树却是绿色的。-----歌德 图片1
Daily English-2016.10
Plants can choose where their seeds end up. Some float on the winds, others on the water. Many seeds hit the ride on or inside animals. And the farther seeds get from their parents and any predators of the disease the parent might have, the better ch
Scientific American(六)月
Prof. Brown:Good morning, everybody.Welcome to Physics 101. My name is Ed Brown, and I will be your professor for this semester. Since today is our first class, I wanted to give you an overview of what this course will look like, how you will be grad
纯正地道美语
Whether we feel rewarded and content in a job depends on several different aspects. The psychologist Frederick Herzberg believed that these could be divided into two groups. In his Theory of Motivation, Herzberg called these groups the Hygiene Factor
人教全日制普通高中英语（必修）高三(全一册)
Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the nineteenth century, the moveme
考研背诵50篇
By Kevin Billinghurst Stockholm 15 October 2007 The 2007 Alfred Nobel Memorial Prize in Economics will be shared by three Americans, Leonid Hurwicz, Eric Maskin and Roger Myerson. From Stockholm, Kevin Billinghurst reports for VOA. The three are hono
2007年VOA常速英语（十月）
If you look around at the men and women whom you can call happy, you will see that they all have certain things in common. The most important of these things is an activity which at most gradually builds up something that you are glad to see coming
白领英语晨读
By Jessica Berman Washington 19 July 2007 The origin of modern humans has been a heated topic among anthropologists, who have debated whether modern man came from Africa or somewhere else. Now, researchers say they have they have proof beyond dispute
2007年VOA标准英语（七月）
How A Theory Of Crime And Policing Was Born, And Went Terribly Wrong play pause stop mute unmute max volume 00:0030:00repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your F
2016年NPR美国国家公共电台11月
In Tom Wolfe's 'Kingdom,' Speech Is The One Weird Trick play pause stop mute unmute max volume 00:0005:06repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.
2016年NPR美国国家公共电台8月
John's theory supports one legend that tells the brutal and merciless execution. After having surrendered his kingdom, the king and his ministers were beheaded on the spot. The royal women also made an equally gruesome end. There is a poem that purpo
自然百科2013年
In general when we refer to a theory we mean something that's not proven yet. In science it's different, as Yael and Don discuss in this Moment of Science. Y: Today, on A Moment of Science, we clear up the difference between a scientific theory and a
英语时差8，16
By Sarah Williams 08 October 2009 Interview with Mike Parker Pearson, University of Sheffield, UK Download (MP3) Stonehenge British archeologists have found evidence of an ancient site related to the world-famous Stonehenge in southwest England. The
VOA标准英语2009年(十月)
Do you think of yourself as a bit of an expert at board games like chess or Go? Maybe you're not quite as good as you think. New research from the University of Manchester and the University of Oxford suggests complex games like these are impossible
英语听力精选进阶版
The Heat Is On 热传递，是热从温度高的物体传到温度低的物体，或者从物体的高温部分传到低温部分的过程。热传递是自然界普遍存在的一种自然现象。只要物体之间或同一物体的不同部分之间
英语听力文摘 English Digest