What does the underlined word “forerunner”(Paragraph 6) probably mean、

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• 1Which of the following is about the five countries that launched man-made satelliteindependently before 1970、

  A.The former Union of Soviet Socialist Republics，the UK，France，China and Japan.

  B.The former Union of Soviet Socialist Republics，the USA，Japan，Canada and China.

  C.America，France，Japan，China and Australia.

  D.The former Union of Soviet Socialist Republics，America，France，Japan and China.

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• 2When did Qian xuesen begin to study in Massachusetts Institute of Technology、

  A.In 1955.

  B.In 1935.

  C.In 1936.

  D.In 1934.

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• 3According to the passage，which of the following about Qian Xuesen is NOT true、

  A.In 1956，he made good preparations for the Fifth Research Institute of State Ministry of Defense.

  B.He made outstanding contributions to the establishment and development of Chinese aerospace undertaking.

  C.He returned to China，bringing China the hope of developing space science and its own missiles.

  D.He devoted all his life to China’s space scienc

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• 4It can be inferred from Paragraph 6 that ________.

  A.Qian Xuesen is very concerned about the development of young scientists.

  B.The help of Qian Xuesen is beneficial to young scientists.

  C.Qian Xuesen gives many opportunities to general designers.

  D.When the chief designers do something wrong，Qian Xuesen helps them find out the caus

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