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A careless person is apt to make mistakes
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A new era is upon us A new era is upon us. Call it what you will: the service economy, the information age, the knowledge society. It all translates to a fundamental change in the way we work. Already we’re partly there. The percentage of people who earn their living by making things has fallen dramatically in the Western World. Today the majority of jobs in America, Europe and Japan ( two thirds or more in many of these countries) are in the service industry, and the number is on the rise. More part-time jobs, more people are self-employed. But the breadth of the economic transformation can’t be measured by numbers alone, because it also is giving rise to a radical new way of thinking about the nature of work itself. Long-held notions about jobs and careers, the skills needed to succeed, even the relation between individuals and employers---all these are being challenged. We have only to look behind us to get some sense of what may lie ahead. No one looking ahead 20 years possibly could have foreseen the ways in which a single invention, the chip (集成块), would transform our world to its applications in personal computers, digital communications and factory robots. Tomorrow’s achievements in biotechnology, artificial intelligence or even some still unimagined technology could produce a similar wave of dramatic changes. But one thing is certain: information and knowledge will become even more vital, and the people who possess it, whether they work in manufacturing or services, will have the advantage and produce the wealth. Computer knowledge will become as basic requirement as the ability to read and write. The ability to solve problems by applying information instead of performing routine tasks will be valued above all else, if you cast your mind ahead 10 years, information services will be predominant. It will be the way you do your job.
Man is fated to suffer many disappointments in his quest for truth.
说明晶体结构为何不存在5次或高于6次的对称轴
第三篇 Oil Refining An important new industry, oil refining, grew after the civil war. Crude oil, or petroleum --- a dark, thick ooze from the earth --- had been known for hundreds of years. But little use had ever been made of it. In the 1850’s Samuel M. Kier a manufacturer in western Pennsylvania, began collecting the oil from local seepages (油苗) and refining it into kerosene. Refining, like smelting is a process of removing impurities from a raw material. Kerosene was used to light lamps. It was a cheap substitute for whale oil, which was becoming harder to get. Soon there was a large demand for kerosene. People began to search for new supplies of petroleum. The first oil well was drilled by E.L.Drake, a retaired railroad conductor. In 1859 he began drilling in Titusvill, Pennsylvania. The whole venture seemed so impractical and foolish that onlookers called it “ Drake’s Folly”. But when he had drilled down about 70 feet (21 meters ), Drake struck oil and his well began to yield 20 barrels of crude oil a day. News of Drake’s success brought oil prospectors to the scene. By the early 1860’s these wildcatters were drilling for “black gold “ all over western Pennsylvania. The boom rivaled the California gold rush of 1848 in its excitement and Wild West atmosphere. And it brought far more wealth to the prospectors than any gold rush. Crude oil could be refined into many products. For some years kerosene continued to be the principal one. It was sold in grocery stores and door-to-door. In the 1880’s and 1890’s refiners learned how to make other petroleum products such as waxes and lubricating oils. Petroleum was not then used to make gasoline or heating oil.
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