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.以下是小编为大家搜索整理的职称英语综合A阅读理解考试题及答案,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!
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 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 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 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 compound 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.
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.
ared to common 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.
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.
element enables the ceramic tape to lower its temperature?
A. Copper.
B. Liquid nitrogen.
C. Clay.
D. Calcium.
rding 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 successful.
-
2014年职称英语真题(卫生A)阅读理解原文出处
2014年职称英语真题(卫生A)阅读理解原文出处原文来自于职称英语教材阅读判断第十二篇FirstSelf-containedHeartImplanted【首例整套人工心脏移植】Apatientonthebrinkofdeathhasreceivedtheworld’sfirstself-containedartificialheart—abattery-po...
-
2017年职称英语卫生补全短文精选
在成功的路上,我们只有不懒惰,不胆怯,脚踏实地的,勤奋不辍,才能取得辉煌的成果。以下是小编为大家搜索整理的2017年职称英语卫生补全短文精选,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!TheDayaLanguageDiedWhenCariosWestezdiedattheageof7...
-
2017年职称英语词汇选项考前冲刺题
考试复习的时候需要同学们明确考试重点,将考试基础知识与重点知识从头到尾梳理一遍,另外还需要做一些题。以下是小编为大家搜索整理的2017年职称英语词汇选项考前冲刺题,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!第1部分:词汇选项(第1&md...
-
2016年职称英语理工C级完形填空真题
下面是小编整理的'2016年职称英语理工C级完形填空真题,提供给同学们复习参考。完形填空(第51——65题,每题1分,共15分)下面的短文有15处空白,请根据短文内容为每处空白确定1个最佳选项。FreezingtoDeathforBeautyPeopleinBeijingwearalotofclothingduri...