The Hubble Space Telescope helps scientists to understand the nature of the universe.

试卷相关题目

• 1The nearest black holes are hundreds of light years away from us.

  A.Right

  B.Wrong

  C.Not mentioned

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• 2The sun is the heaviest star in the universe.

  A.Right

  B.Wrong

  C.Not mentioned

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• 3The attraction of two large stars leads to gravity.

  A.Right

  B.Wrong

  C.Not mentioned

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• 4The center of a black hole is empty.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5Black holes exist but are difficult to observe.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6To reduce car crash rate,many scientists are working hard to

  A.design fully automatic cars.

  B.develop faster electric vehicles.

  C.analyze road deaths occurring worldwide each year.

  D.improve the safety of cars and develop new fuels.

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• 7According to the second paragraph,most road accidents happen due to

  A.heavy traffic.

  B.human mistakes.

  C.B.human mistakes.C.engine failure.

  D.bad weather.

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• 8Which of the following safety developments is NOT mentioned in the passage、

  A.Windscreens that can help drivers to improve their vision.

  B.Radars that can help drivers to see obstacles in fog.

  C.Devices that can help drivers to see through big vehicles.

  D.Improvements in seat belts,pedal controls and tyres.

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• 9Satellite tracking and remote communication systems cna be used to

  A.reduce oil consumption.

  B.remove the obstacles on the road.

  C.call for help when one’s car crashes.

  D.help drivers get out of a traffic jam.

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• 10Which of the following statements is true of robotic drivers、

  A.It will take some time before robotic drivers are available.

  B.Robotic drivers are not allowed to driveon busy roads.

  C.Robotic drivers can never replace human drivers.

  D.Robotic drivers are too expensive to us

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