Imagine a chart that begins when man first appeared on the planet and tracks the economic growth of societies from then forward. It would be a long, flat line until the late 16th or early 17th century, when it would start trending upward. For most of humankind life was as the English philosopher Thomas Hobbes famously described it in 1651—"solitary, poor, nasty, brutish, and short." But as Hobbes was writing those words, the world around him was changing. Put simply, human beings were getting smarter.
People have always sought knowledge. The scientific revolution, followed by the Enlightenment, marked a fundamental shift. Humans were no longer searching for ways simply to fit into a natural or divine order; but they were seeking to change it. Once people found ways to harness energy—using steam engines—they were able to build machines that harnessed far more power than any human or horse could ever do. And people could work without ever getting
A. were looking for better ways of seeking knowledge
B. were not satisfied with their past achievements
C. were trying to fit into the natural environment
D. were tired of working
Imagine a chart that begins when man first appeared on the planet and tracks the economic growth of societies from then forward. It would be a long, flat line until the late 16th or early 17th century, when it would start trending upward. For most of humankind life was as the English philosopher Thomas Hobbes famously described it in 1651—"solitary, poor, nasty, brutish, and short." But as Hobbes was writing those words, the world around him was changing. Put simply, human beings were getting smarter.
People have always sought knowledge. The scientific revolution, followed by the Enlightenment, marked a fundamental shift. Humans were no longer searching for ways simply to fit into a natural or divine order; but they were seeking to change it. Once people found ways to harness energy—using steam engines—they were able to build machines that harnessed far more power than any human or horse could ever do. And people could work without ever getting
A. Britain’s leadership in the Industrial Revolution
B. The Industrial Revolution in countries like the U.S. and Germany
C. Great development of some Eastern Asian countries
D. The economic boom in Turkey and Brazil
When man began to search the skies, he saw a lot of things. In the universe(宇宙), the earth seemed to be just a small bit of dust. It is only a small planet, and travels around the sun. The sun together with its planets, travels in the Milky Way(银河), our galaxy(星系). The Milky Way has about thirty billion stars like our sun, and is one of about a hundred million galaxies in the universe.
Because the space (空间)is so great, it is difficult to work out how far away a star is. Instead of kilometres, we have light-years. A light-year means how far light travels in one year. Our nearest neighbour galaxy is more than 9000,000 light-years away from the earth.
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