At what temperature does the superconducting ceramic lose its resistance__________、

试卷相关题目

• 1Compared to common electrical conductors, superconductors__________

  A.have little or no electrical resistance

  B.Can be used for along time

  C.are not energy-efficient

  D.can be made easily

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• 2What 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 conserve

  D.D.Detroit will first receive electricity transmitted by the new electrical cables

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• 3Less—educated people report fewer days of stress possibly because

  A.they don’t want to tell the truth.

  B.they don’t want to face the truth.

  C.stress is too common a factor in their life.D their stress is more acute.

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• 4The less advantaged people are，the greater

  A.the impact of stress on their health is.

  B.the effect of education on their health is

  C.the level of their education is.

  D.the degree of their health concern is.

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• 5Which group reported the biggest number of stressful days、

  A.People without any education.

  B.People without high school degrees.

  C.People with high school degrees.

  D.People with college degrees.

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• 6What element enables the ceramic tape to lower its temperature__________、

  A.Copper.

  B.Liquid nitrogen.

  C.Clay.

  D.Calcium.

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• 7According 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.

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• 8According to the passage, the science of the future is likely to be__________

  A.electronics

  B.biotechnology

  C.genetic engineering

  D.nuclear technology

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• 9Organic chemistry helps to produce materials that are__________

  A.as good as wool

  B.as good as an insect's body

  C.not as good as natural materials

  D.better than natural materials

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• 10According to the passage, it may soon be possible__________

  A.to make something as good as human skin

  B.to produce drugs without side effects

  C.to transplant human organs

  D.to make artificial hearts and eyes

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