单项选择
单项选择
Detroit is famous for the production of （）
A:automobile B:timber C:bamboo
One of the world’s (largest) salt mines (lie) directly (under) the (city) Detroit.（ ）
A:largest B:lie C:under D:city
{{B}}第二篇{{/B}}
| {{B}}
? ?An underground revolution begins this winter. With the flip (轻击) of a switch, 30,000 homes in one part of Detroit will soon become 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 power 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 common 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 superconducting 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 (锶), and calcium (钙). A ceramic is a hard, strong compound made from clay or minerals. The superconducting ceramic has been fashioned into a tape that is wrapped lengthwise around a long tube filled with liquid nitrogen. Liquid nitrogen is supercold and lowers the temperature of the ceramic tape 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. |
A:With a flip of switch, electricity can be transmitted. B:Other American cities can benefit from the high-performance cables. C:Great amounts of power can be conserved. D:Detroit will first receive electricity transmitted by the new electrical cables.
{{B}}第二篇{{/B}}
| {{B}}
? ?An underground revolution begins this winter. With the flip (轻击) of a switch, 30,000 homes in one part of Detroit will soon become 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 power 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 common 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 superconducting 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 (锶), and calcium (钙). A ceramic is a hard, strong compound made from clay or minerals. The superconducting ceramic has been fashioned into a tape that is wrapped lengthwise around a long tube filled with liquid nitrogen. Liquid nitrogen is supercold and lowers the temperature of the ceramic tape 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. |
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.
{{B}}第二篇{{/B}}
| {{B}}
? ?An underground revolution begins this winter. With the flip (轻击) of a switch, 30,000 homes in one part of Detroit will soon become 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 power 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 common 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 superconducting 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 (锶), and calcium (钙). A ceramic is a hard, strong compound made from clay or minerals. The superconducting ceramic has been fashioned into a tape that is wrapped lengthwise around a long tube filled with liquid nitrogen. Liquid nitrogen is supercold and lowers the temperature of the ceramic tape 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. |
A:-143 degree Celsius. B:-263 degree Celsius. C:As long as it is ice-cold. D:Absolute zero.
What is the benefit of the revolution mentioned in the first paragraph?
A:With a flip of switch, electricity can be transmitted. B:Other American cities can benefit from the high-performance cables. C:Great amounts of power can be conserved. D:Detroit will first receive electricity transmitted by the new electrical cables.
第二篇 Superconductor Ceramic(陶瓷) An underground revolution begins this winter．with the flip(轻击)of a switch，30，000 homes in one part of Detroit will soon become 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 power 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 common 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 10se 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 10se 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(锶)．and calcium(钙)．A ceramic is a hard．strong compound made from clay or minerals．The superconducting ceramic has been fashioned into a tape that is wrapped lengthwise around a long tube filled with liquid nitrogen．Liquid nitrogen is supercold and lowers the temperature of the ceramic tape 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．0ther cities are watching the Frisbie experiment in the hope that they might switch to superconducting cable and conserve power．too． 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?performance cables． C:Great amounts of power can be conserved． D:Detroit will first receive electricity transmitted by the new electrical cables
While the president’s Homeowner Stabilization Initiative, announced on Feb. 18, offers loan modifications for homeowners already in negative- equity (资产净值)situations and the stimulus package offers an $ 8,000 tax credit for first -time buyers, there are several places where such efforts are likely to have little effect.
Specifically, you don’t want to be a homeowner in several parts of California, Florida and the upper Midwest. Detroit, Mich. , Miami, Fl
A:a. , and Merced, Calif. , are among the top five riskiest spots for homeowners, ranking second, third and fifth, respectively. California and Florida areas dominate the list, taking up almost three - quarters of the 25 spots. B:What is the reason that people don’t want to buy homes in some parts of California. Florida and the upper Midwest They are very likely to lose money. People don’t have money to buy homes. These places are not covered in the stimulus package. Homes are too expensive in these places.
汉译英：“底特律”，正确的翻译为( )。
A:Dublin B:Detroit C:Darwin D:Dunkir
