职称英语综合A阅读理解考试题及答案.doc

职称英语综合A阅读理解考试题及答案 职称英语综合A阅读理解考试题及答案 　　Understand yourself in order to better understanding others.以下是为大家搜索的综合A阅读理解题及答案，希望能给大家带来帮助!更多精彩内容请及时关注我们! 　　An underground revolution begins this winter. With the flip (轻击) of a switch, 30,000 homes in one part of Detroit will soon bee the first in the country to receive electricity transmitted by ice-cold high-performance cables. Other American cities are expected to follow Detroit's example in the years ahead, which could conserve enormous amounts of power. 　　The new electrical cables at the Frisbie powe.r station in Detroit are revolutionary because they are made of superconductors. A superconductor is a material that transmits electricity with little or no resistance. Resistance is the degree to which a substance resists electric current. All mon electrical conductors have a certain amount of electrical resistance. They convert at least some of the electrical energy passing through them into waste heat. Superconductors don't. No one understands how superconductivity works. It just does. 　　Making superconductors isn't easy. A superconductor material has to be cooled to an extremely low temperature to lose its resistance. The first superconductors, made more than 50 years ago, had to be cooled to -263 degrees Celsius before they lost their resistance. Newer superconducting materials lose their resistance at -143 degrees Celsius. 　　The superconductors cable installed at the Frisbie station is made of a ceramic material that contains copper, oxygen; bismuth(铋 ), strontium(偲 ), and calcium( 钙 ). A ceramic is a hard, strong pound made from clay or minerals. The superconducting ceramic has been fashioned into a tape that is wrapped lengthwis.e around a long tube filled with liquid nitrogen. Liquid nitrogen is supercold and lowers the temperature of the ceramictape to the point where it conveys electricity 　　with zero resistance. 　　The United States loses an enormous amount of electricity each year to resistance. Because cooled superconductors have no resistance, they waste much less power. Other cities are watching the Frisbie experiment in the hope that they might switch to superconducting cable and conserve power, too. 　　1.What is the benefit of the revolution mentioned in the first paragraph? 　　A. With a flip of swish, electricity can be transmitted. 　　B. Other American cities can benefit from the high-perfo ——rraance cables. 　　C. Great amounts of power can be conserved. 　　D. Detroit will first receive electricity transmitted by the new electrical cables. 　　2.Compared to mon electrical conductors, superconductors 　　A. have little or no electrical resistance. 　　B. can be used for a long time. 　　C. are not energy-efficient. 　　D. can be made easily. 　　3.At what temperature does the superconducting ceramic lose its resistance? 　　A. -143 degree Celsius. 　　B. -263 degree Celsius. 　　C. As long as it is ice-cold. 　　D. Absolute zero. 　　4.What element enables the ceramic tape to lower its temperature? 　　A. Copper. 　　B. Liquid nitrogen. 　　C. Clay. 　　D. Calcium. 　　5.Aording to the last paragraph, which of the following statements is NOT true? 　　A. Other cities hope they can also conserve power. 　　B. Other cities hope they can use superconducting cables soon. 　　C. Superconductors waste less power because of their low resistance. 　　D. The Fribie experiment is not suessful. 。