[多项选择]By any measure, computers are among the most influential and powerful tools of the modern age. They represent the high-tech revolution that has transformed the ways in which human beings interact with each other and with the world at large. Seemingly, computers are the very definition of the modern era. Although modern computers have only been a part of our everyday world for a few decades, a discovery made just over a century ago found that the concept behind them is far older than anyone could have imagined. In fact, according to the experts who have studied an ancient Greek shipwreck, one particular "computer" dates back more than 2,000 years.
Made of metal, this mechanism is approximately the size of a shoebox. It was found in 1901 by divers working off the isle of Antikythera. Uncertain of the mechanism’s function, the divers naned it after the island near which it was found. At the time, the Antikythera was in terrible shape from being underwater for so long. Its pieces had

[单项选择]By any measure, computers are among the most influential and powerful tools of the modern age. They represent the high-tech revolution that has transformed the ways in which human beings interact with each other and with the world at large. Seemingly, computers are the very definition of the modern era. Although modern computers have only been a part of our everyday world for a few decades, a discovery made just over a century ago found that the concept behind them is far older than anyone could have imagined. In fact, according to the experts who have studied an ancient Greek shipwreck, one particular "computer" dates back more than 2,000 years.
Made of metal, this mechanism is approximately the size of a shoebox. It was found in 1901 by divers working off the isle of Antikythera. Uncertain of the mechanism’s function, the divers naned it after the island near which it was found. At the time, the Antikythera was in terrible shape from being underwater for so long. Its pieces had
A. explain how computers were originally designed
B. provide details on how to compute solar and lunar eclipses
C. introduce the concept of an ancient device with a modern application
D. describe the discovery of a computer-like machine designed more than 2,000 years ago
E. show how x-ray computer tomography has helped scientists explore ancient discoveries

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Science Fiction
Among the most popular books being written today are those which are usually classified as science fiction. Hundreds of titles are published every year and are read by all kinds of people. Furthermore, some of the most successful films of re cent years have been based on science fiction stories.
It is often thought that science fiction is a fairly new development in literature, but its ancestors can be found in books written hundreds of years ago. These books were often concerned with the presentation of some form of ideal society, a theme which is still often found in modern stories.
Most of the classics of science fiction, however, have been written within the last hundred years. Books by writers such as Jules Verne and H. G. Wells, to mention just two well - known authors, have been translated into many languages. Modern science fiction writers don’ t write about men from Mars or space adventures stories. They are more inte