The Hyper-X broke the record because

试卷相关题目

• 1Generally we remember only a few facts about the past.

  A.Right

  B.Wrong

  C.Not mentioned

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• 2Long—term memory is more important than short-term memory.

  A.Right

  B.Wrong

  C.Not mentioned

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• 3Animals do not have a long-term memory

  A.Right

  B.Wrong

  C.Not mentioned

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• 4Emotional memory is used when we perform physical movements

  A.Right

  B.Wrong

  C.Not mentioned

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• 5Verbal memory helps US read words we have never heard

  A.Right

  B.Wrong

  C.Not mentioned

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• 6What kind of engine did the Hyper-X use、

  A.jet engine that carries its own oxygen supply．

  B.jet engine that uses no oxygen．

  C.scramjet engine that doesn't carry its own oxygen supply．

  D.rocket engine that carries its own oxygen supply.

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• 7Which of the following is NOT true of the scramjet engine、

  A.It has been used on passenger planes．

  B.The air it breathes does not put out the combustion flames．

  C.It works at speeds greater than five times the speed of sound．

  D.It goes as fast as a rocket．

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• 8What does Werner J．A．Dahm say about the Hyper-X test flight、

  A.It was unsuccessful because it lasted only 11 seconds．

  B.It is a very important event in developing very fast airplanes．

  C.It allows people to fly at an altitude of 100,000 feet．

  D.It can transport cargo quickly and cheaply to outer space．

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• 9What does NASA plan to do、

  A.To build one more Hyper-X aircraft．

  B.To carry out three more Hyper-X experiments．

  C.To make the aircraft fly higher and longer．

  D.To test another hypersonic flight at 10 times the speed of sound．

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• 10Parents in the United States tend to ask their children

  A.to save food for tomorrow．

  B.to wash the dishes．

  C.not to waste food．

  D.not to eat too much．

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