19 Children's Numerical Skills

19.childrens numerical skills people appear to born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth. Not long after learning to

18 Modern American Universities

18.Modern American Universities Before the 1850s, the United States had a number of small colleges, most of them dating from colonial days. They were small, church connected institutions whose primary concern was to shape the moral character of their

17 Evolution of Sleep

17.Evolution of sleep Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles. There is some evidence that the two types of sl

16 The War between Britain and France

16. the war between Britain and France In the late eighteenth century, battles raged in almost every corner of Europe, as well as in the Middle East, south Africa ,the West Indies, and Latin America. In reality, however, there was only one major war

20 The Historical Significance of American Revolution

20 The Historical Significance of American Revolution The ways of history are so intricate and the motivations of human actions so complex that it is always hazardous to attempt to represent events covering a number of years, a multiplicity of person

03 The Definition of Price

03 The Definition of Price Prices determine how resources are to be used.(价格决定多少资源被使用) They are also the means by which products and services that are in limited supply are rationed among buyers.(它们也是有限的产品和服务

15 The Nobel Academy

15 The Nobel Academy For the last 82years, Sweden's Nobel Academy has decided who will receive the Nobel Prize in Literature, thereby determining who will be elevated from the great and the near great to the immortal. But today the Academy is coming

11 Archaeology

Archaeology is a source of history, not just a bumble auxiliary discipline. Archaeological data are historical documents in their own right, not mere illustrations to written texts, Just as much as any other historian, an archaeologist studies and tr

10 Types of Speech

10 Types of Speech Standard usage includes those words and expressions understood, used, and accepted by a majority of the speakers of a language in any situation regardless of the level of formality. As such, these words and expressions are well def

09 Suburbanization

09 Suburbanization If by suburb is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of the industrial city in the second quarter of the nineteenth century. Be

08 American Revolution

08 American Revolution The American Revolution was not a revolution in the sense of a radical or toal change .It was not a sudden and violent overturning of the political and social framework, such as later occurred in France and Russia, when both we

07 Andrew Carnegie

07 Andrew Carnegie Andrew Carnegie, known as the King of Steel, built the steel industry in the United States, and , in the process, became one of the wealthiest men in America. His success resulted in part from his ability to sell the product and in

06 Television

06 Television Television-----the most pervasive（弥漫性的，渗透性的） and persuasive(有说服力的，使人信服的) of modern technologies, marked by rapid change and growth-is moving into a new era, an era of extraordinary（非凡的）

14 A Rare Fossil Record

14 A Rare Fossil Record The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had a

05 The Beginning of Drama

05 The Beginning of Drama There are many theories about the beginning of drama in ancient Greece. The one most widely accepted today is based on the assumption that drama evolved from ritual（典礼，宗教仪式）. The argument for this view goes

13 Skyscrapers and Environment

13 Skyscrapers and Environment In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a

12 Museums

12 Museums From Boston to Los Angeles, from New York City to Chicago to Dallas, museums are either planning, building, or wrapping up wholesale expansion programs. These programs already have radically altered facades and floor plans or are expected

02 Schooling and Education

02 Schooling and Education It is commonly believed in United States that school is where people go to get an education. Nevertheless（然而，不过）, it has been said that today children interrupt their education to go to school. The distinction

01 The Language of Music

01 The Language of Music A painter hangs his or her finished pictures on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed. Professional singers and players have great responsibilities, for the co

04 Electricity

04 Electricity The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope(摸索) abo