Flying the Hypert1 Skies
A little airplane has given new meaning to the term going hyper.
The Hyper-X is an unmanned,experimental aircraft just 12 feet long. It achieves hypersonic speed using a special sort of engine known as a scramjet3.It may sound like something from a comic book,but engineers have been experimenting with scramjets since the 1960s.
Out of the three experimental Hyper-X aircrafts built for NASA5,only one is now left.The agency has plans for another 11-second hypersonic flight,this time at 10 times the speed of the sound.
hypersonicadj.超音速的 boostern.助推器
unmannedadj.无人的 booster rocket 助推火箭5skrAmdVet5kB:^Eup
喷气发动机
练习:
A it was the first air-breathing jet plane.
C it flew at speeds smaller than five times the speed of sound.
2. What kind of an engine did the Hyper-X use?
B A scramjet engine that doesnt carry its own oxygen supply.
D A iet engine that uses no oxygen.
A It goes slower than a rocket.
C It works only at speeds greater than five times the speed of sound.
4. What did Werner J.A.Dahm of the University of Michigan say about the Hyper-X test flight?
B It was self-powered,so it lasted only 11 seconds.
【2015职称英语理工类阅读理解训练题(2)】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01