Thousands of years ago man used handy
rocks for his surgical operations. Later he used sharp bone or horn, metal
knives and, more recently, rubber and plastic. And that was where we stuck, in
surgical instrument terms, for many years. In the 1960s a new tool was
developed, one which was, first of all, to be of great practical use to the
armed forces and industry, but which was also, in time, to revolutionize the art
and science of surgery. The tool is the laser and it is, being
used by more and more surgeons all over the world, for a very large number of
different complaints. The word laser means: Light Amplification by Stimulated
Emission of Radiation. As we all know, light is hot; any source of light--from
the sun itself down to a humble match burning--will give warmth. But light is
usually spread out over a wide area. The l A. medical help became available to industrial workers B. the study of surgical techniques went through a complete revolution C. more and more surgeons began using surgical instruments D. man’s whole approach to surgery changed completely
[单项选择] Passage One
Thousands of years ago man used handy
rocks for his surgical operations. Later he used sharp bone or horn, metal
knives and more recently, rubber and plastic. And that was where we stuck, in
surgical instrument terms, for many years. In the 1960s a new tool was
developed, one which was, first of all, to be of great practical use to the
armed forces and industry, but which was also, in time, to revolutionize the art
and science of surgery. The tool is the laser and it is being
used by more and more surgeons all over the world, for a very large number of
different complaints. The word laser means: Light Amplification by Stimulated
Emission of Light. As we all know, light is hot; any source of light ——from the
sun itself down to a humble match burning ——will give warmth. But light is
usually spread out over a wide area. The lig A. fashionable B. extraordinary C. special D. basic
[填空题]Tens and thousands of years passed before wheels were used to make a vehicle.
[单项选择]Thousands of years ago, royalty of diverse cultures were often buried in extremely lavish tombs that they themselves commissioned in preparation for their inevitable deaths. About 2,200 years ago, a Chinese emperor named Qin Shihuang had such a tomb prepared. At the age of thirteen, Qin Shihuang had succeeded his father as emperor. The boy was very aggressive and ambitious. He assumed full power at the age of 22 by ridding himself of his rival, a man who had controlled the throne while Qin Shihuang was a minor. Qin Shihuang’s goal was to unify and subjugate all of the Chinese states using his powerful political, economic, and military strength. Despite an ongoing quest for immortality, Qin Shihuang died while traveling at the age of 49. Although he has been dead for centuries, historians can continue to learn of his life by studying the artifacts found in the extravagant tomb in which he was laid to rest.
[填空题]For thousands of years men have been wandering around--for pleasure, for profit, or to satisfy their curiosity. When the only means of transportation were horses, camels and small boats, travelers were already crossing seas and deserts to acquire rare goods or to visit famous places. For the pure joy of learning, scholars ventured into distant kingdoms and observed their customs. They tasted the foods; they questioned the wise men about their gods and their history; they sat in fearful admiration on the banks of newly discovered rivers. Then they went back home reflecting upon what they had seen, and perhaps they wrote a book or two about their discoveries. Slowly, nations learned about each other, men met and ideas spread--for better or worse. There was a time, close to ours, when artists and writers traveled all over Europe and sometimes further to study ancient works of art and to exchange ideas and methods with their foreign colleagues. Poor adventurers traveled on foot whil
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