In the early days of ancient Olympic Games ________.

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• 1In ancient Greece, the Olympic Games ________.

  A.were merely national athletic festivals

  B.were in the nature of a national event with a strong religious colour

  C.had rules which put foreign participants in a disadvantageous position

  D.were primarily national events with few foreign participants

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• 2Under what conditions are helicopters found to be absolutely essential、

  A.For overseas passenger transportation.

  B.For extremely high altitude flights.

  C.For high-speed transportation.

  D.For urgent mission to places inaccessible to other kinds of craft.

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• 3How has the use of helicopters developed、

  A.They have been widely used for various purposes.

  B.They are taking the place of high-flying jets.

  C.They are used for rescue work.

  D.They are now used exclusively for commercial projects.

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• 4What is said about the development of the helicopter、

  A.Helicopters have only been worked on by man since 1940.

  B.Chinese children were the first to achieve flight in helicopters.

  C.Helicopters were considered more dangerous than the early airplanes.

  D.Some people thought they would become widely used by average individuals.

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• 5Helicopters work with the aid of ________.

  A.a combination of rotating devices in front and on top

  B.a rotating device topside

  C.one rotating fan in the center of the aircraft and others at each end

  D.a rotating fan underneath for lifting

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• 6The order of athletic events at the ancient Olympics ________.

  A.has not definitely been established

  B.varied according to the number of foreign competitors

  C.was decided by Zeus, in whose honor the Games were held

  D.was considered unimportant

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• 7Modern athletes’ results cannot be compared with those of ancient runners because ________.

  A.the Greeks had no means of recording the results

  B.they are much better

  C.details such as the time were not recorded in the past

  D.they are much worse

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• 8Nowadays, the athletes’ expenses are paid for ________.

  A.out of the prize money of the winners

  B.out of the funds raised by the competing nations

  C.by the athletes themselves

  D.by contributions

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• 9The aim of controlled scientific experiments is ________.

  A.to explain why things happen

  B.to explain how things happen

  C.to describe self-evident principles

  D.to support Aristotelian science

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• 10What principles most influenced scientific thought for two thousand years、

  A.the speculations of Thales

  B.the forces of electricity, magnetism, and gravity

  C.Aristotle’s natural science

  D.Galileo’s discoveries

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