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职称英语理工类辅导资料:阅读理解Flying the Hypert1(二)

2013-1-16  来自于:课评集

  3. What is NOT true about the scramjet engine?

  A It goes slower than a rocket.

  B It extracts oxygen from the air that flows through the engine.

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

  D It doesn‘t carry its own oxygen supply.

  4. What did Werner J.A.Dahm of the University of Michigan say about the Hyper-X test flight?

  A It indicated the birth of a very fast airplane.

  B It was self-powered,so it lasted only 11 seconds.

  C It can transportcargo quickly and cheaply to the brink of space.

  D It is a major milestone in the journey of making a new type of very fast airplanes,

  5. What has NASA planned to do?

  A To make another 11-second hypersonic flight at 10 times the speed of the sound.

  B To make three more Hyper-X experiments.

  C To retest the aircraft that is left.

  D To make the aircraft fly higher and longer.

  答案与题解:

  1. C Hyper-X之所以打破纪录是因为它的飞行速度是音速的7倍。它不是第一架空气喷气式飞机,也不是第一架超音速飞机,所以A和D都不对。Hyper-X的试飞并未绕赤道飞行,所以B也是错误的选择。

  2. B 第四段讲了三种发动机的氧气来源:喷气式发动机是从空气中汲取氧气,火箭发动机必须自携氧气,而超音速冲压喷气发动机则不必白携氧气,而这正是Hyper-X使用的发动机装置。

  3. A 根据第五段内容,B、C、D都是正确的说法。第四段最后一句告诉我们,A的说法是不正确的。

  4. D 文章的第六段中,密歇根大学的研究人员Werner J.A.Dahm说,Hyper-X的试飞成功只是研制一种新式快速飞机过程中的一个里程碑(a major milestone on the way to a new breed of very fast airplanes),而不是新型飞机的诞生。所以,D是正确选择,A是错误选择。B也不是Werner J.A.Dahm想要表达的意思。C是其他下程师而不是Werner J.A.Dahm说的话。

  5. A 答案可在最后一段找到。